diff --git a/app/assets/javascripts/annotatable.js.coffee b/app/assets/javascripts/annotatable.js.coffee
index 49757f16a..fbf7f3862 100644
--- a/app/assets/javascripts/annotatable.js.coffee
+++ b/app/assets/javascripts/annotatable.js.coffee
@@ -7,9 +7,9 @@ App.Annotatable =
       annotator.ui.editor.Editor.template = [
         '<div class="annotator-outer annotator-editor annotator-hide">',
         '  <form class="annotator-widget">',
-        '    ' + _t('Unregistered'),
+        "    #{_t('Unregistered')}",
         '    <div class="annotator-controls">',
-        '      <a href="#cancel" class="annotator-cancel">' + _t('Cancel') + '</a>',
+        "      <a href='#cancel' class='annotator-cancel'>#{_t('Cancel')}</a>",
         '    </div>',
         '  </form>',
         '</div>'
@@ -23,7 +23,7 @@ App.Annotatable =
       app = new annotator.App()
         .include ->
           beforeAnnotationCreated: (ann) ->
-            ann[ann_type + "_id"] = ann_id
+            ann["#{ann_type}_id"] = ann_id
             ann.permissions = ann.permissions || {}
             ann.permissions.admin = []
         .include(annotator.ui.main, { element: this })
@@ -34,5 +34,5 @@ App.Annotatable =
         app.ident.identity = current_user_id
 
         options = {}
-        options[ann_type + "_id"] = ann_id
+        options["#{ann_type}_id"] = ann_id
         app.annotations.load(options)
diff --git a/app/assets/javascripts/check_all_none.js.coffee b/app/assets/javascripts/check_all_none.js.coffee
index ffc34ec7f..92a7cc544 100644
--- a/app/assets/javascripts/check_all_none.js.coffee
+++ b/app/assets/javascripts/check_all_none.js.coffee
@@ -3,8 +3,8 @@ App.CheckAllNone =
   initialize: ->
     $('[data-check-all]').on 'click', ->
       target_name = $(this).data('check-all')
-      $("[name='" + target_name + "']").prop('checked', true)
+      $("[name='#{target_name}']").prop('checked', true)
 
     $('[data-check-none]').on 'click', ->
       target_name = $(this).data('check-none')
-      $("[name='" + target_name + "']").prop('checked', false)
+      $("[name='#{target_name}']").prop('checked', false)
diff --git a/app/assets/javascripts/documentable.js.coffee b/app/assets/javascripts/documentable.js.coffee
index a61458150..73bebc4b8 100644
--- a/app/assets/javascripts/documentable.js.coffee
+++ b/app/assets/javascripts/documentable.js.coffee
@@ -69,7 +69,7 @@ App.Documentable =
 
       progress: (e, data) ->
         progress = parseInt(data.loaded / data.total * 100, 10)
-        $(data.progressBar).find('.loading-bar').css 'width', progress + '%'
+        $(data.progressBar).find('.loading-bar').css 'width', "#{progress}%"
         return
 
   buildFileUploadData: (e, data) ->
@@ -112,7 +112,7 @@ App.Documentable =
       $(data.titleField).val(title)
 
   setInputErrors: (data) ->
-    errors = '<small class="error">' + data.jqXHR.responseJSON.errors + '</small>'
+    errors = "<small class='error'>#{data.jqXHR.responseJSON.errors}</small>"
     $(data.errorContainer).append(errors)
 
   lockUploads: ->
@@ -157,4 +157,4 @@ App.Documentable =
       App.Documentable.doDeleteCachedAttachmentRequest(this.href, data)
 
   removeDocument: (id) ->
-    $('#' + id).remove()
+    $("##{id}").remove()
diff --git a/app/assets/javascripts/flaggable.js.coffee b/app/assets/javascripts/flaggable.js.coffee
index 7ada75686..411723368 100644
--- a/app/assets/javascripts/flaggable.js.coffee
+++ b/app/assets/javascripts/flaggable.js.coffee
@@ -1,4 +1,4 @@
 App.Flaggable =
 
   update: (resource_id, button) ->
-    $("#" + resource_id + " .js-flag-actions").html(button).foundation()
+    $("##{resource_id} .js-flag-actions").html(button).foundation()
diff --git a/app/assets/javascripts/followable.js.coffee b/app/assets/javascripts/followable.js.coffee
index 9fa9aa319..10923d327 100644
--- a/app/assets/javascripts/followable.js.coffee
+++ b/app/assets/javascripts/followable.js.coffee
@@ -1,7 +1,7 @@
 App.Followable =
 
   update: (followable_id, button, notice) ->
-    $("#" + followable_id + " .js-follow").html(button)
+    $("##{followable_id} .js-follow").html(button)
     if ($('[data-alert]').length > 0)
       $('[data-alert]').replaceWith(notice)
     else
diff --git a/app/assets/javascripts/globalize.js.coffee b/app/assets/javascripts/globalize.js.coffee
index 5dc30432f..df05b47dc 100644
--- a/app/assets/javascripts/globalize.js.coffee
+++ b/app/assets/javascripts/globalize.js.coffee
@@ -16,18 +16,18 @@ App.Globalize =
       else
         $(this).hide()
       $('.js-delete-language').hide()
-      $('#js_delete_' + locale).show()
+      $("#js_delete_#{locale}").show()
 
   highlight_locale: (element) ->
     $('.js-globalize-locale-link').removeClass('is-active')
     element.addClass('is-active')
 
   remove_language: (locale) ->
-    $(".js-globalize-attribute[data-locale=" + locale + "]").each ->
+    $(".js-globalize-attribute[data-locale=#{locale}]").each ->
       $(this).val('').hide()
       if CKEDITOR.instances[$(this).attr('id')]
         CKEDITOR.instances[$(this).attr('id')].setData('')
-    $(".js-globalize-locale-link[data-locale=" + locale + "]").hide()
+    $(".js-globalize-locale-link[data-locale=#{locale}]").hide()
     next = $(".js-globalize-locale-link:visible").first()
     App.Globalize.highlight_locale(next)
     App.Globalize.display_translations(next.data("locale"))
@@ -48,10 +48,10 @@ App.Globalize =
     )
 
   destroy_locale_field: (locale) ->
-    $("input[id$=_destroy][data-locale=" + locale + "]")
+    $("input[id$=_destroy][data-locale=#{locale}]")
 
   site_customization_enable_locale_field: (locale) ->
-    $("#enabled_translations_" + locale)
+    $("#enabled_translations_#{locale}")
 
   refresh_visible_translations: ->
     locale = $('.js-globalize-locale-link.is-active').data("locale")
diff --git a/app/assets/javascripts/imageable.js.coffee b/app/assets/javascripts/imageable.js.coffee
index e029dff52..70fff0f8a 100644
--- a/app/assets/javascripts/imageable.js.coffee
+++ b/app/assets/javascripts/imageable.js.coffee
@@ -70,7 +70,7 @@ App.Imageable =
 
       progress: (e, data) ->
         progress = parseInt(data.loaded / data.total * 100, 10)
-        $(data.progressBar).find('.loading-bar').css 'width', progress + '%'
+        $(data.progressBar).find('.loading-bar').css 'width', "#{progress}%"
         return
 
   buildFileUploadData: (e, data) ->
@@ -117,11 +117,11 @@ App.Imageable =
       $(data.titleField).val(title)
 
   setInputErrors: (data) ->
-    errors = '<small class="error">' + data.jqXHR.responseJSON.errors + '</small>'
+    errors = "<small class='error'>#{data.jqXHR.responseJSON.errors}</small>"
     $(data.errorContainer).append(errors)
 
   setPreview: (data) ->
-    image_preview = '<div class="small-12 column text-center image-preview"><figure><img src="' + data.result.attachment_url + '" class="cached-image"/></figure></div>'
+    image_preview = "<div class='small-12 column text-center image-preview'><figure><img src='#{data.result.attachment_url}' class='cached-image'></figure></div>"
     if $(data.preview).length > 0
       $(data.preview).replaceWith(image_preview)
     else
@@ -162,5 +162,5 @@ App.Imageable =
       App.Imageable.doDeleteCachedAttachmentRequest(this.href, data)
 
   removeImage: (id) ->
-    $('#' + id).remove()
+    $("##{id}").remove()
     $("#new_image_link").removeClass('hide')
diff --git a/app/assets/javascripts/investment_report_alert.js.coffee b/app/assets/javascripts/investment_report_alert.js.coffee
index c535f4c09..4a1d1d43b 100644
--- a/app/assets/javascripts/investment_report_alert.js.coffee
+++ b/app/assets/javascripts/investment_report_alert.js.coffee
@@ -2,6 +2,6 @@ App.InvestmentReportAlert =
   initialize: ->
     $('#js-investment-report-alert').on 'click', ->
       if this.checked && $('#budget_investment_feasibility_unfeasible').is(':checked')
-        confirm(this.dataset.alert + "\n" + this.dataset.notFeasibleAlert)
+        confirm("#{this.dataset.alert}\n#{this.dataset.notFeasibleAlert}")
       else if this.checked
         confirm(this.dataset.alert)
diff --git a/app/assets/javascripts/legislation_admin.js.coffee b/app/assets/javascripts/legislation_admin.js.coffee
index 5aa19f083..161881ab7 100644
--- a/app/assets/javascripts/legislation_admin.js.coffee
+++ b/app/assets/javascripts/legislation_admin.js.coffee
@@ -6,7 +6,7 @@ App.LegislationAdmin =
         checkbox = $(this)
         parent = $(this).parents('.row:eq(0)')
         date_selector = $(this).data('disable-date')
-        parent.find("input[type='text'][id^='" + date_selector + "']").each ->
+        parent.find("input[type='text'][id^='#{date_selector}']").each ->
           if checkbox.is(':checked')
             $(this).removeAttr("disabled")
           else
diff --git a/app/assets/javascripts/legislation_annotatable.js.coffee b/app/assets/javascripts/legislation_annotatable.js.coffee
index 34385bc1e..d201b4f49 100644
--- a/app/assets/javascripts/legislation_annotatable.js.coffee
+++ b/app/assets/javascripts/legislation_annotatable.js.coffee
@@ -45,7 +45,7 @@ App.LegislationAnnotatable =
 
     $.ajax
       method: "GET"
-      url: event.annotation_url + "/annotations/" + event.annotation_id + "/comments"
+      url: "#{event.annotation_url}/annotations/#{event.annotation_id}/comments"
       dataType: 'script'
 
   onClick: (event) ->
@@ -54,7 +54,7 @@ App.LegislationAnnotatable =
 
     if App.LegislationAnnotatable.isMobile()
       annotation_url = $(event.target).closest(".legislation-annotatable").data("legislation-annotatable-base-url")
-      window.location.href = annotation_url + "/annotations/" + $(this).data('annotation-id')
+      window.location.href = "#{annotation_url}/annotations/#{$(this).data('annotation-id')}"
       return
 
     $('[data-annotation-id]').removeClass('current-annotation')
@@ -66,7 +66,7 @@ App.LegislationAnnotatable =
       $(elem).data("annotation-id")
 
     annotation_id = target.data('annotation-id')
-    $('[data-annotation-id="' + annotation_id + '"]').addClass('current-annotation')
+    $("[data-annotation-id='#{annotation_id}']").addClass('current-annotation')
 
     $('#comments-box').html('')
     App.LegislationAllegations.show_comments()
@@ -101,7 +101,7 @@ App.LegislationAnnotatable =
     annotation_url = $('[data-legislation-annotatable-base-url]').data('legislation-annotatable-base-url')
     $.ajax(
       method: 'GET'
-      url: annotation_url + '/annotations/new'
+      url: "#{annotation_url}/annotations/new"
       dataType: 'script').done (->
         $('#new_legislation_annotation #legislation_annotation_quote').val(@annotation.quote)
         $('#new_legislation_annotation #legislation_annotation_ranges').val(JSON.stringify(@annotation.ranges))
@@ -118,11 +118,11 @@ App.LegislationAnnotatable =
               $("#comments-box").html("").hide()
               $.ajax
                 method: "GET"
-                url: annotation_url + "/annotations/" + data.responseJSON.id + "/comments"
+                url: "#{annotation_url}/annotations/#{data.responseJSON.id}/comments"
                 dataType: 'script'
             else
               $(e.target).find('label').addClass('error')
-              $('<small class="error">' + data.responseJSON[0] + '</small>').insertAfter($(e.target).find('textarea'))
+              $("<small class='error'>#{data.responseJSON[0]}</small>").insertAfter($(e.target).find('textarea'))
             return true
           )
         return
@@ -138,8 +138,8 @@ App.LegislationAnnotatable =
         ann_id = anchor.split("-")[-1..]
 
         checkExist = setInterval((->
-          if $("span[data-annotation-id='" + ann_id + "']").length
-            el = $("span[data-annotation-id='" + ann_id + "']")
+          if $("span[data-annotation-id='#{ann_id}']").length
+            el = $("span[data-annotation-id='#{ann_id}']")
             el.addClass('current-annotation')
             $('#comments-box').html('')
             App.LegislationAllegations.show_comments()
@@ -164,11 +164,11 @@ App.LegislationAnnotatable =
       last_annotation = annotations[annotations.length - 1]
 
       checkExist = setInterval((->
-        if $("span[data-annotation-id='" + last_annotation.id + "']").length
+        if $("span[data-annotation-id='#{last_annotation.id}']").length
           for annotation in annotations
             ann_weight = App.LegislationAnnotatable.propotionalWeight(annotation.weight, max_weight)
-            el = $("span[data-annotation-id='" + annotation.id + "']")
-            el.addClass('weight-' + ann_weight)
+            el = $("span[data-annotation-id='#{annotation.id}']")
+            el.addClass("weight-#{ann_weight}")
           clearInterval checkExist
         return
       ), 100)
diff --git a/app/assets/javascripts/map.js.coffee b/app/assets/javascripts/map.js.coffee
index 1eabfa132..68ec8e943 100644
--- a/app/assets/javascripts/map.js.coffee
+++ b/app/assets/javascripts/map.js.coffee
@@ -75,7 +75,7 @@ App.Map =
     openMarkerPopup = (e) ->
       marker = e.target
 
-      $.ajax '/investments/' + marker.options['id'] + '/json_data',
+      $.ajax "/investments/#{marker.options['id']}/json_data",
         type: 'GET'
         dataType: 'json'
         success: (data) ->
diff --git a/app/assets/javascripts/polls.js.coffee b/app/assets/javascripts/polls.js.coffee
index 6f3a61859..eb39bf9a2 100644
--- a/app/assets/javascripts/polls.js.coffee
+++ b/app/assets/javascripts/polls.js.coffee
@@ -23,7 +23,7 @@ App.Polls =
       click: =>
         token_message = $(".js-token-message")
         if !token_message.is(':visible')
-          token_message.html(token_message.html() + "<br><strong>" + @token + "</strong>")
+          token_message.html("#{token_message.html()}<br><strong>#{@token}</strong>")
           token_message.show()
     false
 
diff --git a/app/assets/javascripts/tags.js.coffee b/app/assets/javascripts/tags.js.coffee
index e641203f7..b2bb95d4e 100644
--- a/app/assets/javascripts/tags.js.coffee
+++ b/app/assets/javascripts/tags.js.coffee
@@ -8,7 +8,7 @@ App.Tags =
 
       unless $this.data('initialized') is 'yes'
         $this.on('click', ->
-          name = '"' + $(this).text() + '"'
+          name = "\"#{$(this).text()}\""
           current_tags = $tag_input.val().split(',').filter(Boolean)
 
           if $.inArray(name, current_tags) >= 0
diff --git a/app/assets/javascripts/tree_navigator.js.coffee b/app/assets/javascripts/tree_navigator.js.coffee
index 406b156f6..5f984a6d9 100644
--- a/app/assets/javascripts/tree_navigator.js.coffee
+++ b/app/assets/javascripts/tree_navigator.js.coffee
@@ -30,7 +30,7 @@ App.TreeNavigator =
           elem.siblings('ul').show()
 
     if anchor = $(location).attr('hash')
-      if link = elem.find('a[href="' + anchor + '"]')
+      if link = elem.find("a[href='#{anchor}']")
         link.parents('ul').each ->
           $(this).show()
           $(this).siblings('span').removeClass('closed').addClass('open')