diff --git a/addons/website/static/src/xml/website.xml b/addons/website/static/src/xml/website.xml
index 0998a03c66d..5890350e2dc 100644
--- a/addons/website/static/src/xml/website.xml
+++ b/addons/website/static/src/xml/website.xml
@@ -80,7 +80,7 @@
                             <p>The web site has encountered an error.</p>
                             <p>
                                 It might be possible to edit the relevant items
-                                or fix the issue in <a t-href="#{backend_url}">
+                                or fix the issue in <a t-attf-href="#{backend_url}">
                                 the classic OpenERP interface</a>.
                             </p>
                         </section>
diff --git a/addons/website_blog/views/website_blog_templates.xml b/addons/website_blog/views/website_blog_templates.xml
index f0e090e1d15..037a00ef8ff 100644
--- a/addons/website_blog/views/website_blog_templates.xml
+++ b/addons/website_blog/views/website_blog_templates.xml
@@ -12,7 +12,7 @@
 <!-- Layout add nav and footer -->
 <template id="header_footer_custom" inherit_id="website.layout" name="Footer News Blog Link">
     <xpath expr="//footer//div[@name='info']/ul" position="inside">
-        <li><a t-href="/blog/%(website_blog.blog_blog_1)d/">News</a></li>
+        <li><a t-attf-href="/blog/%(website_blog.blog_blog_1)d/">News</a></li>
     </xpath>
 </template>
 
@@ -53,7 +53,7 @@
                     <t t-foreach="blogs" t-as="blog">
                       <div class="col-md-4">
                         <h4>
-                            <a t-href="/blogpost/#{ slug(blog) }?#{ tag and 'tag=%s' % tag.id or '' }#{tag and date and '&amp;' or ''}#{ date and 'date=%s' % date or ''}" t-field="blog.name"></a>
+                            <a t-attf-href="/blogpost/#{ slug(blog) }?#{ tag and 'tag=%s' % tag.id or '' }#{tag and date and '&amp;' or ''}#{ date and 'date=%s' % date or ''}" t-field="blog.name"></a>
                             <span t-if="not blog.website_published" class="text-warning">
                                 &amp;nbsp;
                                 <span class="fa fa-warning" title="Not published"/>
@@ -62,7 +62,7 @@
                         <div class="text-muted">
                             <span class="fa fa-calendar"> <span t-field="blog.create_date"/> &amp;nbsp;</span>
                             <span class="fa fa-folder-open"> In
-                                <a t-href="/blog/#{ slug(blog.blog_id) }">
+                                <a t-attf-href="/blog/#{ slug(blog.blog_id) }">
                                 <span t-field="blog.blog_id"/>
                                 </a> &amp;nbsp;
                             </span>
@@ -75,7 +75,7 @@
                         </div>
                         <div class="text-muted" t-if="len(blog.message_ids) &gt; 0">
                             <span class="fa fa-comment-o">
-                                <a t-href="/blogpost/#{ slug(blog) }/?#{ tag and 'tag=%s' % tag.id or '' }#{tag and date and '&amp;' or ''}#{ date and 'date=%s' % date or ''}#comment">
+                                <a t-attf-href="/blogpost/#{ slug(blog) }/?#{ tag and 'tag=%s' % tag.id or '' }#{tag and date and '&amp;' or ''}#{ date and 'date=%s' % date or ''}#comment">
                                     <t t-if="len(blog.message_ids) &lt;= 1" ><t t-esc="len(blog.message_ids)"/> comment</t>
                                     <t t-if="len(blog.message_ids) > 1"><t t-esc="len(blog.message_ids)"/> comments</t>
                                 </a>
@@ -100,7 +100,7 @@
     <div t-if="not blog_posts">
         <div class="text-center text-muted">
           <h3 class="css_editable_display">No blog post found</h3>
-          <h3 class="css_editable_hidden">Nothing published yet click <a t-href="/page/website.contactus">here</a> to contact us</h3>
+          <h3 class="css_editable_hidden">Nothing published yet click <a t-attf-href="/page/website.contactus">here</a> to contact us</h3>
           <t groups="base.group_website_publisher">
             <t groups="base.group_document_user">
                 <p>Click on "Content" to define a new blog post or "Help" for more informations.</p>
@@ -112,12 +112,12 @@
     <t t-foreach="blog_posts" t-as="blog_post">
       <div t-att-data-publish="blog_post.website_published and 'on' or 'off'">
         <h2 class="text-center">
-            <a t-href="/blogpost/#{ slug(blog_post) }/?#{ tag and 'tag=%s' % tag.id or '' }#{tag and date and '&amp;' or ''}#{ date and 'date=%s' % date or ''}" t-field="blog_post.name"></a>
+            <a t-attf-href="/blogpost/#{ slug(blog_post) }/?#{ tag and 'tag=%s' % tag.id or '' }#{tag and date and '&amp;' or ''}#{ date and 'date=%s' % date or ''}" t-field="blog_post.name"></a>
         </h2>
         <p class="post-meta text-muted text-center" name='blog_post_data'>
             <span class="fa fa-calendar oe_date"> <span t-field="blog_post.create_date"/> &amp;nbsp;</span>
             <span t-if="len(blog_post.message_ids) &gt; 0" class="fa fa-comment-o">
-                <a t-href="/blogpost/#{ slug(blog_post) }/?#{ tag and 'tag=%s' % tag.id or '' }#{tag and date and '&amp;' or ''}#{ date and 'date=%s' % date or ''}#comment">
+                <a t-attf-href="/blogpost/#{ slug(blog_post) }/?#{ tag and 'tag=%s' % tag.id or '' }#{tag and date and '&amp;' or ''}#{ date and 'date=%s' % date or ''}#comment">
                     <t t-if="len(blog_post.message_ids) &lt;= 1" ><t t-esc="len(blog_post.message_ids)"/> comment</t>
                     <t t-if="len(blog_post.message_ids) > 1"><t t-esc="len(blog_post.message_ids)"/> comments</t>
                 </a>
@@ -147,7 +147,7 @@
         <p class="post-meta text-muted text-center" t-if="len(blog_post.tag_ids)">
             <span class="fa fa-tags"/>
             <t t-foreach="blog_post.tag_ids" t-as="tag">
-                <a t-href="/blog/#{ slug(blog) }/tag/#{ slug(tag) }" t-esc="tag.name"/> &amp;nbsp;
+                <a t-attf-href="/blog/#{ slug(blog) }/tag/#{ slug(tag) }" t-esc="tag.name"/> &amp;nbsp;
             </t>
         </p>
     </xpath>
@@ -212,10 +212,10 @@
           <div class="row">
             <div class="col-sm-9">
                 <ol class="breadcrumb">
-                    <li><a t-href="/blog/#{ slug(blog) }"><span t-field="blog.name"/></a></li>
-                    <li t-if="tag"><a t-href="/blog/#{ slug(blog) }/tag/#{ slug(tag) }"><span t-field="tag.name"/></a></li>
-                    <li t-if="tag and date"><a t-href="/blog/#{ slug(blog) }/tag/#{ slug(tag) }/date/#{ date }" t-esc="date_name"/></li>
-                    <li t-if="not tag and date"><a t-href="/blog/#{ slug(blog) }/date/#{ date }" t-esc="date_name"/></li>
+                    <li><a t-attf-href="/blog/#{ slug(blog) }"><span t-field="blog.name"/></a></li>
+                    <li t-if="tag"><a t-attf-href="/blog/#{ slug(blog) }/tag/#{ slug(tag) }"><span t-field="tag.name"/></a></li>
+                    <li t-if="tag and date"><a t-attf-href="/blog/#{ slug(blog) }/tag/#{ slug(tag) }/date/#{ date }" t-esc="date_name"/></li>
+                    <li t-if="not tag and date"><a t-attf-href="/blog/#{ slug(blog) }/date/#{ date }" t-esc="date_name"/></li>
                     <li class="active"><span t-field="blog_post.name"/></li>
                 </ol>
             </div><div class="col-sm-3">
@@ -268,7 +268,7 @@
         <p class="post-meta text-muted text-center" t-if="len(blog_post.tag_ids)">
             <span class="fa fa-tags"/>
             <t t-foreach="blog_post.tag_ids" t-as="tag">
-                <a t-href="/blog/#{ slug(blog) }/tag/#{ slug(tag) }" t-esc="tag.name"/> &amp;nbsp;
+                <a t-attf-href="/blog/#{ slug(blog) }/tag/#{ slug(tag) }" t-esc="tag.name"/> &amp;nbsp;
             </t>
         </p>
     </xpath>
@@ -313,7 +313,7 @@
         <ul class="nav nav-pills nav-stacked">
             <t t-foreach="tags" t-as="tag_id">
             <li t-att-class="tag and tag_id.id == tag.id and 'active' or None" style="display: inline-block;">
-                <a t-href="/blog/#{ slug(blog) }/tag/#{ slug(tag_id) }"><span t-field="tag_id.name"/></a>
+                <a t-attf-href="/blog/#{ slug(blog) }/tag/#{ slug(tag_id) }"><span t-field="tag_id.name"/></a>
             </li>
             </t>
         </ul>
@@ -330,7 +330,7 @@
         <ul class="nav nav-pills nav-stacked">
             <t t-foreach="nav_list" t-as="months">
             <li t-att-class="months['date'] == date and 'active' or None">
-                <a t-ignore="True" t-href="/blog/#{ slug(blog) }/#{ tag and 'tag/%s/' % slug(tag) or '' }date/#{ months['date'] }"><t t-esc="months['create_date']"/><span class="pull-right badge" t-esc="months['create_date_count']"/></a>
+                <a t-ignore="True" t-attf-href="/blog/#{ slug(blog) }/#{ tag and 'tag/%s/' % slug(tag) or '' }date/#{ months['date'] }"><t t-esc="months['create_date']"/><span class="pull-right badge" t-esc="months['create_date_count']"/></a>
             </li>
             </t>
         </ul>
@@ -391,7 +391,7 @@
         <ul class="nav nav-pills nav-stacked">
             <t t-foreach="blogs" t-as="nav_blog">
                 <li t-att-class="nav_blog.id == blog.id and 'active' or ''">
-                    <a t-href="/blog/#{ slug(nav_blog) }">
+                    <a t-attf-href="/blog/#{ slug(nav_blog) }">
                         <span t-field="nav_blog.name"/>
                     </a>
                 </li>
diff --git a/addons/website_crm_partner_assign/views/website_crm_partner_assign.xml b/addons/website_crm_partner_assign/views/website_crm_partner_assign.xml
index 97d611a5d04..a8b1c43e765 100644
--- a/addons/website_crm_partner_assign/views/website_crm_partner_assign.xml
+++ b/addons/website_crm_partner_assign/views/website_crm_partner_assign.xml
@@ -41,7 +41,7 @@
                     <t t-foreach="countries" t-as="country_dict">
                         <t t-if="country_dict['country_id']">
                             <li t-att-class="country_dict['country_id'][0] == current_country_id and 'active' or ''">
-                                <a t-href="#{ country_dict['country_id'][0] and '/partners/country/%s' % slug(country_dict['country_id']) or '/partners/' }">
+                                <a t-attf-href="#{ country_dict['country_id'][0] and '/partners/country/%s' % slug(country_dict['country_id']) or '/partners/' }">
                                     <t t-esc="country_dict['country_id'][1]"/> <small>(<t t-esc="country_dict['country_id_count']"/>)</small>
                                 </a>
                             </li>
@@ -83,11 +83,11 @@
                             <t t-set="internal_gid" t-value="partner_data['grade_id'][1]"/>
                         </t>
                         <div class="media thumbnail">
-                            <a class="pull-left" t-href="/partners/#{ slug([partner_data.get('id'), partner_data.get('name')]) }/">
+                            <a class="pull-left" t-attf-href="/partners/#{ slug([partner_data.get('id'), partner_data.get('name')]) }/">
                                 <img class="media-object" t-attf-src="data:image/png;base64,#{partner_data['image_small']}"/>
                             </a>
                             <div class="media-body" style="min-height: 64px;">
-                                <a class="media-heading" t-href="/partners/#{ slug([partner_data.get('id'), partner_data.get('name')]) }/"><t t-if="partner_data['parent_id']"><span t-esc="partner_data['parent_id'][1]"/></t> <span t-esc="partner_data['name']"/></a> - <span t-esc="partner_data['grade_id'][1]"/>
+                                <a class="media-heading" t-attf-href="/partners/#{ slug([partner_data.get('id'), partner_data.get('name')]) }/"><t t-if="partner_data['parent_id']"><span t-esc="partner_data['parent_id'][1]"/></t> <span t-esc="partner_data['name']"/></a> - <span t-esc="partner_data['grade_id'][1]"/>
                                 <div t-esc="partner_data['website_short_description']"/>
                             </div>
                         </div>
diff --git a/addons/website_customer/views/website_customer.xml b/addons/website_customer/views/website_customer.xml
index 6f8055694fc..def29a71d03 100644
--- a/addons/website_customer/views/website_customer.xml
+++ b/addons/website_customer/views/website_customer.xml
@@ -41,12 +41,12 @@
                         <div class="row">
                             <t t-foreach="partners_data" t-as="partner_data" class="media">
                                 <div class="col-md-2">
-                                    <a t-href="/customers/#{ slug([partner_data.get('id'), partner_data.get('name')]) }/">
+                                    <a t-attf-href="/customers/#{ slug([partner_data.get('id'), partner_data.get('name')]) }/">
                                         <img class="img img-thumbnail" t-attf-src="data:image/png;base64,#{partner_data.get('image')}"/>
                                     </a>
                                 </div><div class="col-md-10">
                                     <h4>
-                                        <a t-href="/customers/#{ slug([partner_data.get('id'), partner_data.get('name')]) }/" t-esc="partner_data.get('name')"/>
+                                        <a t-attf-href="/customers/#{ slug([partner_data.get('id'), partner_data.get('name')]) }/" t-esc="partner_data.get('name')"/>
                                     </h4>
                                     <div t-raw="partner_data.get('website_short_description')"/>
                                 </div>
@@ -78,7 +78,7 @@
             <t t-foreach="countries" t-as="country_dict">
                 <t t-if="country_dict['country_id']">
                     <li t-att-class="country_dict['country_id'][0] == current_country_id and 'active' or ''">
-                        <a t-href="/customers/#{ country_dict['country_id'][0] and 'country/%s/' % slug(country_dict['country_id']) or '' }">
+                        <a t-attf-href="/customers/#{ country_dict['country_id'][0] and 'country/%s/' % slug(country_dict['country_id']) or '' }">
                             <span class="badge pull-right" t-esc="country_dict['country_id_count']"/>
                             <t t-esc="country_dict['country_id'][1]"/>
                         </a>
@@ -171,7 +171,7 @@
                         </div>
                     </address>
                     <div>
-                        <a t-href="/customers/#{ slug([partner_data.get('id'), partner_data.get('name')]) }/#references/" t-if="implemented_partner_ids">
+                        <a t-attf-href="/customers/#{ slug([partner_data.get('id'), partner_data.get('name')]) }/#references/" t-if="implemented_partner_ids">
                             <t t-esc="len(implemented_partner_ids)"/> references
                         </a>
                     </div>
@@ -186,11 +186,11 @@
         <t t-if="implemented_partners_data">
             <h3 id="references">References</h3>
             <div t-foreach="implemented_partners_data" t-as="partner_data" class="media thumbnail">
-                <a class="pull-left" t-href="/customers/#{ slug([partner_data.get('id'), partner_data.get('name')]) }/">
+                <a class="pull-left" t-attf-href="/customers/#{ slug([partner_data.get('id'), partner_data.get('name')]) }/">
                     <img class="media-object" t-attf-src="data:image/png;base64,#{partner_data.get('image_small')}"/>
                 </a>
                 <div class="media-body" style="min-height: 64px;">
-                    <a class="media-heading" t-href="/customers/#{ slug([partner_data.get('id'), partner_data.get('name')]) }/">
+                    <a class="media-heading" t-attf-href="/customers/#{ slug([partner_data.get('id'), partner_data.get('name')]) }/">
                         <t t-if="partner_data.get('parent_id')"><span t-esc="partner_data.get('parent_id')[1]"/></t> <span t-esc="partner_data.get('name')"/>
                     </a>
                     <div t-if="partner_data.get('website_short_description')" t-raw="partner_data.get('website_short_description')"/>
diff --git a/addons/website_event/views/website_event.xml b/addons/website_event/views/website_event.xml
index 5fd4dd04bda..fbaf512fe45 100644
--- a/addons/website_event/views/website_event.xml
+++ b/addons/website_event/views/website_event.xml
@@ -46,7 +46,7 @@
                     <t t-if="not event_ids">
                         <div class="text-center text-muted">
                           <h3 class="css_editable_display">No event found</h3>
-                          <h3 class="css_editable_hidden">There isn't available events right now, <t t-if="current_date or current_country or current_type">click <a t-href="/event">here</a> to check all events or</t> click <a t-href="/page/website.contactus">here</a> to contact us</h3>
+                          <h3 class="css_editable_hidden">There isn't available events right now, <t t-if="current_date or current_country or current_type">click <a t-attf-href="/event">here</a> to check all events or</t> click <a t-attf-href="/page/website.contactus">here</a> to contact us</h3>
                           <t groups="base.group_website_publisher">
                             <t groups="event.group_event_manager">
                                 <p>Click on "Content" to define a new event or "Help" for more informations.</p>
@@ -60,7 +60,7 @@
                         <li t-foreach="event_ids" t-as="event" class="media">
                             <div class="media-body">
                                 <h4 class="media-heading">
-                                    <a t-att-class="event.state == 'done' and 'text-success'" t-href="/event/#{ slug(event) }/#{(not event.menu_id) and 'register/' or ''}"><span t-field="event.name"> </span></a>
+                                    <a t-att-class="event.state == 'done' and 'text-success'" t-attf-href="/event/#{ slug(event) }/#{(not event.menu_id) and 'register/' or ''}"><span t-field="event.name"> </span></a>
                                     <small t-if="not event.website_published" class="label label-danger">not published</small>
                                 </h4>
                                 <div>
@@ -136,7 +136,7 @@
             <ul class="nav nav-pills nav-stacked">
                 <t t-foreach="dates" t-as="date">
                     <li t-att-class="searches.get('date') == date[0] and 'active' or ''" t-if="date[3] or (date[0] in ('old','all'))">
-                        <a t-href="/event/?{{ keep_query('country', 'type', date=date[0] }}"><t t-esc="date[1]"/>
+                        <a t-attf-href="/event/?{{ keep_query('country', 'type', date=date[0] }}"><t t-esc="date[1]"/>
                             <span t-if="date[3]" class="badge pull-right"><t t-esc="date[3]"/></span>
                         </a>
                     </li>
@@ -151,7 +151,7 @@
         <ul class="nav nav-pills nav-stacked mt32">
             <t t-foreach="types">
                 <li t-if="type" t-att-class="searches.get('type') == str(type and type[0]) and 'active' or ''">
-                    <a t-href="/event/?{{ keep_query('country', 'date', type=type[0] }}"><t t-esc="type[1]"/>
+                    <a t-attf-href="/event/?{{ keep_query('country', 'date', type=type[0] }}"><t t-esc="type[1]"/>
                         <span class="badge pull-right"><t t-esc="type_count"/></span>
                     </a>
                 </li>
@@ -164,7 +164,7 @@
         <ul class="nav nav-pills nav-stacked mt32">
             <t t-foreach="countries">
                 <li t-if="country_id" t-att-class="searches.get('country') == str(country_id and country_id[0]) and 'active' or ''">
-                    <a t-href="/event/?{{ keep_query('type', 'data', country=country_id[0] }}"><t t-esc="country_id[1]"/>
+                    <a t-attf-href="/event/?{{ keep_query('type', 'data', country=country_id[0] }}"><t t-esc="country_id[1]"/>
                         <span class="badge pull-right"><t t-esc="country_id_count"/></span>
                     </a>
                 </li>
@@ -183,10 +183,10 @@
                     <ol class="breadcrumb mb0" t-if="not event.menu_id">
                         <li><a href="/event">All Events</a></li>
                         <li t-if="event.type">
-                            <a t-href="/event?type=#{event.type.id}" t-esc="event.type.name"/>
+                            <a t-attf-href="/event?type=#{event.type.id}" t-esc="event.type.name"/>
                         </li>
                         <li t-if="event.country_id">
-                            <a t-href="/event?country=#{event.country_id.id}" t-esc="event.country_id.name"/>
+                            <a t-attf-href="/event?country=#{event.country_id.id}" t-esc="event.country_id.name"/>
                         </li>
                         <li class="active">
                             <span t-field="event.name"/>
@@ -258,7 +258,7 @@
                 <div class="container">
                     <h1 class="mt32">Event not found!</h1>
                     <p>Sorry, the requested event is not available anymore.</p>
-                    <p><a t-href="/event/">Return to the event list.</a></p>
+                    <p><a t-attf-href="/event/">Return to the event list.</a></p>
                 </div>
             </div>
         </div>
diff --git a/addons/website_event_sale/views/website_event_sale.xml b/addons/website_event_sale/views/website_event_sale.xml
index e6d784b9b97..302c76a89a9 100644
--- a/addons/website_event_sale/views/website_event_sale.xml
+++ b/addons/website_event_sale/views/website_event_sale.xml
@@ -15,7 +15,7 @@
 
 <template id="event_description_full" inherit_id="website_event.event_description_full" inherit_option_id="website_event.event_description_full" name="Event's Ticket form">
     <xpath expr="//div[@t-field='event.description']" position="before">
-        <form t-action="/event/add_cart?event_id=#{ event.id }" method="post" t-if="event.event_ticket_ids">
+        <form t-attf-action="/event/add_cart?event_id=#{ event.id }" method="post" t-if="event.event_ticket_ids">
             <table class="table table-striped">
                 <thead>
                     <tr>
diff --git a/addons/website_event_track/views/website_event.xml b/addons/website_event_track/views/website_event.xml
index e1c454ce24f..b92f7547ce1 100644
--- a/addons/website_event_track/views/website_event.xml
+++ b/addons/website_event_track/views/website_event.xml
@@ -17,7 +17,7 @@
             <div class="row">
                 <div t-attf-class="col-md-#{(len(event.sponsor_ids) > 6) and 2 or (12/ len(event.sponsor_ids))} text-center" t-foreach="event.sponsor_ids" t-as="sponsor">
                     <t t-if="sponsor.has_access_to_partner()">
-                        <a t-href="/partners/#{ slug([sponsor.partner_id.id, sponsor.partner_id.name]) }" style="position: relative; display: inline-block;">
+                        <a t-attf-href="/partners/#{ slug([sponsor.partner_id.id, sponsor.partner_id.name]) }" style="position: relative; display: inline-block;">
                             <span t-field="sponsor.partner_id.image"
                                 t-field-options='{"widget": "image", "class": "shadow"}'/>
                             <div class="ribbon-wrapper">
@@ -143,7 +143,7 @@
                 </div>
                 <div class="col-sm-10">
                     <h3 class="mt0 mb0">
-                        <a t-href="/event/#{ slug(event) }/track/#{ slug(track) }"><span t-field="track.name"> </span></a>
+                        <a t-attf-href="/event/#{ slug(event) }/track/#{ slug(track) }"><span t-field="track.name"> </span></a>
                         <small t-if="not track.website_published" class="label label-danger">not published</small>
                     </h3>
                     <ul class="list-inline mb0">
@@ -159,7 +159,7 @@
                     </ul>
                     <ul class="list-inline">
                         <li t-foreach="track.tag_ids" t-as="tag_id" class="text-muted fa fa-tags">
-                            <a t-href="/event/#{ slug(event) }/track/tag/#{ slug(tag_id) }">
+                            <a t-attf-href="/event/#{ slug(event) }/track/tag/#{ slug(tag_id) }">
                                 <span t-field="tag_id.name"/>
                             </a>
                         </li>
@@ -174,10 +174,10 @@
 <template id="tracks_filter" inherit_id="website_event_track.tracks" inherit_option_id="website_event_track.tracks" name="Filter on Tags">
     <xpath expr="//div[@id='left_column']" position="inside">
         <ul class="nav nav-pills nav-stacked">
-            <li t-att-class="'' if searches.get('tag') else 'active'"><a t-href="/event/#{ slug(event) }/track/">All Tags</a></li>
+            <li t-att-class="'' if searches.get('tag') else 'active'"><a t-attf-href="/event/#{ slug(event) }/track/">All Tags</a></li>
             <t t-foreach="tags" t-as="tag">
                 <li t-att-class="searches.get('tag') == tag.id and 'active' or ''">
-                    <a t-href="/event/#{ slug(event) }/track/tag/#{ slug(tag) }">
+                    <a t-attf-href="/event/#{ slug(event) }/track/tag/#{ slug(tag) }">
                         <t t-esc="tag.name"/>
                     </a>
                 </li>
@@ -198,7 +198,7 @@
             <h3 t-field="event.name" class="text-center text-muted"/>
             <ul t-if="track.tag_ids" class="text-center text-muted list-inline">
                 <li t-foreach="track.tag_ids" t-as="tag_id" class="fa fa-tags">
-                    <a t-href="/event/#{ slug(event) }/track/tag/#{ slug(tag_id) }">
+                    <a t-attf-href="/event/#{ slug(event) }/track/tag/#{ slug(tag_id) }">
                         <span t-field="tag_id.name"/>
                     </a>
                 </li>
diff --git a/addons/website_hr_recruitment/views/website_hr_recruitment.xml b/addons/website_hr_recruitment/views/website_hr_recruitment.xml
index 5a339413b47..beabdcef008 100644
--- a/addons/website_hr_recruitment/views/website_hr_recruitment.xml
+++ b/addons/website_hr_recruitment/views/website_hr_recruitment.xml
@@ -58,7 +58,7 @@
                         <div t-if="not jobs">
                             <div class="text-center text-muted">
                               <h4 class="css_editable_display">No job offer found</h4>
-                              <h4 class="css_editable_hidden">There isn't job offer published now, click <a t-href="/page/website.contactus">here</a> to contact us</h4>
+                              <h4 class="css_editable_hidden">There isn't job offer published now, click <a t-attf-href="/page/website.contactus">here</a> to contact us</h4>
                               <t groups="base.group_website_publisher">
                                 <t  groups="base.group_hr_manager">
                                   <p>Click on "Content" to define a new job offer or "Help" for more informations.</p>
@@ -71,7 +71,7 @@
                             <li t-foreach="jobs" t-as="job" class="media">
                                 <div class="media-body" t-att-data-publish="job.website_published and 'on' or 'off'">
                                     <h3 class="media-heading">
-                                        <a t-href="/job/detail/#{ slug(job) }/">
+                                        <a t-attf-href="/job/detail/#{ slug(job) }/">
                                             <span t-field="job.name"/>
                                         </a>
                                         <small t-if="job.no_of_recruitment &gt; 1">
@@ -138,7 +138,7 @@
                 <div class="container">
                     <div class="row">
                         <div class="col-md-12 text-center mt16 mb16">
-                            <a t-href="/job/apply/?job=#{ job.id }" class="btn btn-primary btn-lg">Apply</a>
+                            <a t-attf-href="/job/apply/?job=#{ job.id }" class="btn btn-primary btn-lg">Apply</a>
                         </div>
                     </div>
                 </div>
@@ -240,7 +240,7 @@
             <li t-att-class=" '' if active else 'active' "><a href="/jobs">All Departments</a></li>
             <t t-foreach="departments" t-as="department">
                 <li t-att-class="department.id == active and 'active' or ''">
-                <a t-href="/jobs/department/#{ slug(department) }/" ><span t-field="department.name"/></a>
+                <a t-attf-href="/jobs/department/#{ slug(department) }/" ><span t-field="department.name"/></a>
                 </li>
             </t>
         </ul>
@@ -259,7 +259,7 @@
             <li t-att-class=" '' if office else 'active' "><a href="/jobs">All Offices</a></li>
             <t t-foreach="offices" t-as="thisoffice">
                 <li t-att-class="thisoffice.id == office and 'active' or ''">
-                    <a t-href="/jobs/office/#{ slug(thisoffice) }/" >
+                    <a t-attf-href="/jobs/office/#{ slug(thisoffice) }/" >
                         <span t-field="thisoffice.city"/><t t-if="thisoffice.country_id">,
                             <span t-field="thisoffice.country_id.name"/>
                         </t>
diff --git a/addons/website_membership/views/website_membership.xml b/addons/website_membership/views/website_membership.xml
index 9689f7da0f9..72d43aeff30 100644
--- a/addons/website_membership/views/website_membership.xml
+++ b/addons/website_membership/views/website_membership.xml
@@ -34,7 +34,7 @@
                     <li t-att-class="'' if membership else 'active'"><a href="/members/">All</a></li>
                     <t t-foreach="memberships" t-as="membership_id">
                         <li t-att-class="membership and membership_id.id == membership.id and 'active' or ''">
-                            <a t-href="/members/association/#{ membership_id.id }"><t t-esc="membership_id.name"/></a>
+                            <a t-attf-href="/members/association/#{ membership_id.id }"><t t-esc="membership_id.name"/></a>
                         </li>
                     </t>
                 </ul>
@@ -61,11 +61,11 @@
                         </t>
                         <t t-set="partner_data" t-value="partners_data[membership_line_id.partner.id]"/>
                         <div class="media">
-                            <a class="pull-left" t-href="/members/#{ slug([partner_data.get('id'), partner_data.get('name')]) }/">
+                            <a class="pull-left" t-attf-href="/members/#{ slug([partner_data.get('id'), partner_data.get('name')]) }/">
                                 <img class="media-object" t-attf-src="data:image/png;base64,#{partner_data.get('image_small')}"/>
                             </a>
                             <div class="media-body" style="min-height: 64px;">
-                                <a class="media-heading" t-href="/members/#{ slug([partner_data.get('id'), partner_data.get('name')]) }/"><t t-if="partner_data.get('parent_id')"><span t-esc="partner_data.get('parent_id')[1]"/></t> <span t-esc="partner_data.get('name')"/></a>
+                                <a class="media-heading" t-attf-href="/members/#{ slug([partner_data.get('id'), partner_data.get('name')]) }/"><t t-if="partner_data.get('parent_id')"><span t-esc="partner_data.get('parent_id')[1]"/></t> <span t-esc="partner_data.get('name')"/></a>
                                 <div t-raw="partner_data.get('website_short_description')"/>
                             </div>
                         </div>
@@ -87,7 +87,7 @@
             <li class="nav-header"><h3>Location</h3></li>
             <t t-foreach="countries">
                 <li t-if="country_id" t-att-class="post.get('country_id', '0') == str(country_id and country_id[0]) and 'active' or ''">
-                    <a t-href="/members/#{ membership and 'association/%s/' % membership.id or '' }#{ country_id[0] and 'country/%s/' % slug(country_id) or '' }#{ search }"><t t-esc="country_id[1]"/>
+                    <a t-attf-href="/members/#{ membership and 'association/%s/' % membership.id or '' }#{ country_id[0] and 'country/%s/' % slug(country_id) or '' }#{ search }"><t t-esc="country_id[1]"/>
                         <span class="badge pull-right"><t t-esc="country_id_count"/></span>
                     </a>
                 </li>
diff --git a/addons/website_project/views/website_project.xml b/addons/website_project/views/website_project.xml
index 5cb03786ac3..28adb31e3cf 100644
--- a/addons/website_project/views/website_project.xml
+++ b/addons/website_project/views/website_project.xml
@@ -5,14 +5,14 @@
 <!-- Layout add nav and footer -->
 <template id="footer_custom" inherit_id="website.layout" name="Footer Project's Links">
     <xpath expr="//footer//ul[@name='products']" position="inside">
-        <li t-foreach="website_project_ids" t-as="project"><a t-href="/project/#{ project.id }/" t-field="project.name"/></li>
+        <li t-foreach="website_project_ids" t-as="project"><a t-attf-href="/project/#{ project.id }/" t-field="project.name"/></li>
     </xpath>
 </template>
 
 <!-- Project --> 
 <template id="task_kanban_card" name="TaskKanban">
     <div class="thumbnail">
-        <a t-href="/web#model=project.task&amp;id=#{object_id.id}"><span t-field="object_id.name"/></a>
+        <a t-attf-href="/web#model=project.task&amp;id=#{object_id.id}"><span t-field="object_id.name"/></a>
         <div>
             Assigned to <span t-field="object_id.user_id"/>
         </div>
diff --git a/addons/website_quote/views/website_quotation.xml b/addons/website_quote/views/website_quotation.xml
index 90581529853..04d3eadb8c2 100644
--- a/addons/website_quote/views/website_quotation.xml
+++ b/addons/website_quote/views/website_quotation.xml
@@ -56,7 +56,7 @@
                               t-field-options='{"widget": "monetary", "display_currency": "quotation.pricelist_id.currency_id"}'/>
                       </td>
                       <td>
-                          <a t-href="./update_line/#{ line.id }/?order_id=#{ quotation.id }&amp;unlink=True&amp;token=#{ quotation.access_token }" class="mb8 js_update_line_json pull-right hidden-print" t-if="line.option_line_id">
+                          <a t-attf-href="./update_line/#{ line.id }/?order_id=#{ quotation.id }&amp;unlink=True&amp;token=#{ quotation.access_token }" class="mb8 js_update_line_json pull-right hidden-print" t-if="line.option_line_id">
                               <span class="fa fa-trash-o"></span>
                           </a>
                       </td>
@@ -96,13 +96,13 @@
       <xpath expr="//div[@id='quote_qty']" position="replace">
           <div class="input-group">
               <span class="input-group-addon hidden-print">
-                  <a t-href="./update_line/#{ line.id }/?order_id=#{ quotation.id }&amp;remove=True&amp;token=#{ quotation.access_token }" class="mb8 js_update_line_json">
+                  <a t-attf-href="./update_line/#{ line.id }/?order_id=#{ quotation.id }&amp;remove=True&amp;token=#{ quotation.access_token }" class="mb8 js_update_line_json">
                       <span class="fa fa-minus"/>
                   </a>
               </span>
               <input type="text" class="js_quantity form-control" t-att-data-id="line.id" t-att-value="line.product_uom_qty"/>
               <span class="input-group-addon hidden-print">
-                  <a t-href="./update_line/#{ line.id }/?order_id=#{ quotation.id }&amp;token=#{ quotation.access_token }" class="mb8 js_update_line_json">
+                  <a t-attf-href="./update_line/#{ line.id }/?order_id=#{ quotation.id }&amp;token=#{ quotation.access_token }" class="mb8 js_update_line_json">
                       <span class="fa fa-plus"/>
                   </a>
               </span>
@@ -443,7 +443,7 @@
                                 </strong>
                             </td>
                             <td class="pull-right">
-                                <a t-href="/quote/add_line/#{ option.id }/#{ quotation.id }/#{ quotation.access_token }" class="mb8 hidden-print">
+                                <a t-attf-href="/quote/add_line/#{ option.id }/#{ quotation.id }/#{ quotation.access_token }" class="mb8 hidden-print">
                                     <span class="fa fa-shopping-cart"/>
                                 </a>
                             </td>
diff --git a/addons/website_sale/views/website_sale.xml b/addons/website_sale/views/website_sale.xml
index 211ad683b44..dde42ea5ce7 100644
--- a/addons/website_sale/views/website_sale.xml
+++ b/addons/website_sale/views/website_sale.xml
@@ -27,7 +27,7 @@
 
 <template id="categories_recursive" name="Category list">
   <li t-att-class="category.id == search.get('category') and 'active' or ''">
-      <a t-href="/shop/category/#{ slug(category) }/" t-field="category.name"></a>
+      <a t-attf-href="/shop/category/#{ slug(category) }/" t-field="category.name"></a>
       <ul t-if="category.child_id" class="nav nav-pills nav-stacked nav-hierarchy">
           <t t-foreach="category.child_id" t-as="category">
               <t t-call="website_sale.categories_recursive"/>
@@ -54,12 +54,12 @@
     <div class="ribbon btn btn-danger">Sale</div>
   </div>
   <div class="oe_product_image">
-      <a t-href="/shop/product/{{ slug(product) }}/?{{ keep_query('category', 'search', 'filters') }}">
+      <a t-attf-href="/shop/product/{{ slug(product) }}/?{{ keep_query('category', 'search', 'filters') }}">
           <span t-field="product.image" t-field-options='{"widget": "image"}'/>
       </a>
   </div>
   <section>
-      <h5><strong><a t-href="/shop/product/{{ slug(product) }}/?{{ keep_query('category', 'search', 'filters') }}" t-field="product.name"/></strong></h5>
+      <h5><strong><a t-attf-href="/shop/product/{{ slug(product) }}/?{{ keep_query('category', 'search', 'filters') }}" t-field="product.name"/></strong></h5>
       <div class="product_price" t-if="product.product_variant_ids">
           <b>
               <t t-if="abs(product.product_variant_ids[0].lst_price - product.product_variant_ids[0].price) &gt; 0.2">
@@ -189,7 +189,7 @@
               <t t-if="not bins">
                 <div class="text-center text-muted">
                   <h3 class="css_editable_display">No product found</h3>
-                  <h3 class="css_non_editable_mode_hidden">There isn't available products right now, click <a t-href="/page/website.contactus">here</a> to contact us</h3>
+                  <h3 class="css_non_editable_mode_hidden">There isn't available products right now, click <a t-attf-href="/page/website.contactus">here</a> to contact us</h3>
                   <t groups="base.group_website_publisher">
                     <t groups="base.group_sale_manager">
                       <p>Click on "Content" to define a new product or "Help" for more informations.</p>
@@ -251,7 +251,7 @@
               <div class="container">
                   <h1 class="mt32">Product not found!</h1>
                   <p>Sorry, this product is not available anymore.</p>
-                  <p><a t-href="/shop/">Return to the product list.</a></p>
+                  <p><a t-attf-href="/shop/">Return to the product list.</a></p>
               </div>
           </div>
       </div>
@@ -360,7 +360,7 @@
                   <div class='mt16 text-center'>
                       <span t-field="product.image_small"/>
                       <h5>
-                          <a t-href="/shop/product/#{ slug(product) }/"
+                          <a t-attf-href="/shop/product/#{ slug(product) }/"
                              style="display: block">
                               <span t-field='product.name'
                                     style="display: block"/>
@@ -486,7 +486,7 @@
                               </td>
                               <td t-if="line.product_id.product_tmpl_id">
                                   <div>
-                                      <a t-href="/shop/product/#{ slug(line.product_id.product_tmpl_id) }/">
+                                      <a t-attf-href="/shop/product/#{ slug(line.product_id.product_tmpl_id) }/">
                                           <strong t-field="line.product_id.name"/>
                                           <t t-if="line.product_id.variants">(<t t-esc="line.product_id.variants"/>)</t>
                                       </a>
@@ -509,14 +509,14 @@
                               <td>
                                   <div class="input-group">
                                       <span class="input-group-addon">
-                                          <a t-href="../change_cart/#{ line.id }/?remove=True" class="mb8 js_add_cart_json">
+                                          <a t-attf-href="../change_cart/#{ line.id }/?remove=True" class="mb8 js_add_cart_json">
                                               <i class="fa fa-minus"></i>
                                           </a>
                                       </span>
                                       <input type="text" class="js_quantity form-control"
                                           t-att-data-id="line.id" t-att-value="int(line.product_uom_qty)"/>
                                       <span class="input-group-addon">
-                                          <a t-href="../change_cart/#{ line.id }/" class="mb8 float_left js_add_cart_json">
+                                          <a t-attf-href="../change_cart/#{ line.id }/" class="mb8 float_left js_add_cart_json">
                                               <i class="fa fa-plus"></i>
                                           </a>
                                       </span>
@@ -640,14 +640,14 @@
               <tr t-foreach="suggested_products" t-as="product">
 
                   <td>
-                      <a t-href="/shop/product/#{ slug(product.product_tmpl_id) }/">
+                      <a t-attf-href="/shop/product/#{ slug(product.product_tmpl_id) }/">
                           <span t-field="product.image_small"
                                 t-field-options='{"widget": "image", "class": "img-rounded"}'/>
                       </a>
                   </td>
                   <td>
                       <div>
-                          <a t-href="/shop/product/#{ slug(product.product_tmpl_id) }/">
+                          <a t-attf-href="/shop/product/#{ slug(product.product_tmpl_id) }/">
                               <strong t-field="product.name"/>
                           </a>
                       </div>
@@ -889,7 +889,7 @@
                       <tr t-foreach="website_sale_order.website_order_line" t-as="line">
                           <td colspan="2" t-if="not line.product_id.product_tmpl_id"></td>
                           <td t-if="line.product_id.product_tmpl_id">
-                              <a t-href="/shop/product/#{ slug(line.product_id.product_tmpl_id) }/">
+                              <a t-attf-href="/shop/product/#{ slug(line.product_id.product_tmpl_id) }/">
                                   <span t-field="line.product_id.image_small"
                                         t-field-options='{"widget": "image", "class": "img-rounded"}'/>
                               </a>