svelte

packages/@ember/-internals/views/lib/system/lookup_partial.js

@@ -1,65 +1,74 @@
 import { assert, deprecate } from '@ember/debug';
 import EmberError from '@ember/error';
+import { PARTIALS } from '@ember/deprecated-features';
 
 function parseUnderscoredName(templateName) {
-  let nameParts = templateName.split('/');
-  let lastPart = nameParts[nameParts.length - 1];
+  if (PARTIALS) {
+    let nameParts = templateName.split('/');
+    let lastPart = nameParts[nameParts.length - 1];
 
-  nameParts[nameParts.length - 1] = `_${lastPart}`;
+    nameParts[nameParts.length - 1] = `_${lastPart}`;
 
-  return nameParts.join('/');
+    return nameParts.join('/');
+  }
 }
 
 export default function lookupPartial(templateName, owner) {
-  deprecate(
-    `The use of \`{{partial}}\` is deprecated, please refactor the "${templateName}" partial to a component`,
-    false,
-    {
-      id: 'ember-views.partial',
-      until: '4.0.0',
-      url: 'https://deprecations.emberjs.com/v3.x#toc_ember-views-partial',
-    }
-  );
+  if (PARTIALS) {
+    deprecate(
+      `The use of \`{{partial}}\` is deprecated, please refactor the "${templateName}" partial to a component`,
+      false,
+      {
+        id: 'ember-views.partial',
+        until: '4.0.0',
+        url: 'https://deprecations.emberjs.com/v3.x#toc_ember-views-partial',
+      }
+    );
 
-  if (templateName == null) {
-    return;
-  }
+    if (templateName == null) {
+      return;
+    }
 
-  let template = templateFor(owner, parseUnderscoredName(templateName), templateName);
+    let template = templateFor(owner, parseUnderscoredName(templateName), templateName);
 
-  assert(`Unable to find partial with name "${templateName}"`, Boolean(template));
+    assert(`Unable to find partial with name "${templateName}"`, Boolean(template));
 
-  return template;
+    return template;
+  }
 }
 
 export function hasPartial(name, owner) {
-  if (!owner) {
-    throw new EmberError(
-      'Container was not found when looking up a views template. ' +
-        'This is most likely due to manually instantiating an Ember.View. ' +
-        'See: http://git.io/EKPpnA'
+  if (PARTIALS) {
+    if (!owner) {
+      throw new EmberError(
+        'Container was not found when looking up a views template. ' +
+          'This is most likely due to manually instantiating an Ember.View. ' +
+          'See: http://git.io/EKPpnA'
+      );
+    }
+
+    return (
+      owner.hasRegistration(`template:${parseUnderscoredName(name)}`) ||
+      owner.hasRegistration(`template:${name}`)
     );
   }
-
-  return (
-    owner.hasRegistration(`template:${parseUnderscoredName(name)}`) ||
-    owner.hasRegistration(`template:${name}`)
-  );
 }
 
 function templateFor(owner, underscored, name) {
-  if (!name) {
-    return;
-  }
-  assert(`templateNames are not allowed to contain periods: ${name}`, name.indexOf('.') === -1);
+  if (PARTIALS) {
+    if (!name) {
+      return;
+    }
+    assert(`templateNames are not allowed to contain periods: ${name}`, name.indexOf('.') === -1);
 
-  if (!owner) {
-    throw new EmberError(
-      'Container was not found when looking up a views template. ' +
-        'This is most likely due to manually instantiating an Ember.View. ' +
-        'See: http://git.io/EKPpnA'
-    );
-  }
+    if (!owner) {
+      throw new EmberError(
+        'Container was not found when looking up a views template. ' +
+          'This is most likely due to manually instantiating an Ember.View. ' +
+          'See: http://git.io/EKPpnA'
+      );
+    }
 
-  return owner.lookup(`template:${underscored}`) || owner.lookup(`template:${name}`);
+    return owner.lookup(`template:${underscored}`) || owner.lookup(`template:${name}`);
+  }
 }

packages/@ember/deprecated-features/index.ts

@@ -15,3 +15,4 @@ export const APP_CTRL_ROUTER_PROPS = !!'3.10.0-beta.1';
 export const FUNCTION_PROTOTYPE_EXTENSIONS = !!'3.11.0-beta.1';
 export const MOUSE_ENTER_LEAVE_MOVE_EVENTS = !!'3.13.0-beta.1';
 export const EMBER_COMPONENT_IS_VISIBLE = !!'3.15.0-beta.1';
+export const PARTIALS = !!'3.15.0-beta.1';