Downlevel for IE11

(cherry picked from commit 72c3fd7)

Author: chancancode

lib/index.js

@@ -554,61 +554,59 @@ module.exports = {
       this.ui.writeWarnLine('[DEPRECATION] ' + globalMessage);
     }
 
-    let onDotAccess = `(dotKey, importKey, module) => {
-      let message =
-        \`Using \\\`\${dotKey}\\\` has been deprecated. Instead, import the value directly from \${module}:\\n\\n\` +
-        \`  import { \${importKey} } from '\${module}';\\n\\n\` +
-        'These usages may be caused by an outdated ember-cli-babel dependency. ' +
-        ${JSON.stringify(suggestions)};
-
-      if (${
-        hasActionableSuggestions &&
-        process.env.EMBER_RUNLOOP_AND_COMPUTED_DOT_ACCESS_DEPRECATIONS !== 'all'
-      }) {
-        message +=
-          '\\n### Important ###\\n\\n' +
-          'In order to avoid repeatedly showing the same deprecation messages, ' +
-          'no further deprecation messages will be shown for theses deprecated usages ' +
-          'until ember-cli-babel is upgraded to v7.26.6 or above.\\n\\n' +
-          'To see all instances of this deprecation message, ' +
-          'set the \`EMBER_RUNLOOP_AND_COMPUTED_DOT_ACCESS_DEPRECATIONS\` environment variable to "all", ' +
-          'e.g. \`EMBER_RUNLOOP_AND_COMPUTED_DOT_ACCESS_DEPRECATIONS=all ember test\`.\\n';
-      }
+    let onDotAccess = `function (dotKey, importKey, module) {
+          var message =
+            'Using \`' + dotKey + '\` has been deprecated. Instead, import the value directly from ' + module + ':\\n\\n' +
+            '  import { ' + importKey + ' } from \\'' + module + '\\';\\n\\n' +
+            'These usages may be caused by an outdated ember-cli-babel dependency. ' +
+            ${JSON.stringify(suggestions)};
+
+          if (${
+            hasActionableSuggestions &&
+            process.env.EMBER_RUNLOOP_AND_COMPUTED_DOT_ACCESS_DEPRECATIONS !== 'all'
+          }) {
+            message +=
+              '\\n### Important ###\\n\\n' +
+              'In order to avoid repeatedly showing the same deprecation messages, ' +
+              'no further deprecation messages will be shown for theses deprecated usages ' +
+              'until ember-cli-babel is upgraded to v7.26.6 or above.\\n\\n' +
+              'To see all instances of this deprecation message, ' +
+              'set the \`EMBER_RUNLOOP_AND_COMPUTED_DOT_ACCESS_DEPRECATIONS\` environment variable to "all", ' +
+              'e.g. \`EMBER_RUNLOOP_AND_COMPUTED_DOT_ACCESS_DEPRECATIONS=all ember test\`.\\n';
+          }
 
-      message += ${JSON.stringify(details)};
+          message += ${JSON.stringify(details)};
 
-      return message;
-    }`;
+          return message;
+        }`;
 
     this._bootstrapEmber = `
       require('@ember/-internals/bootstrap').default(
         ${JSON.stringify(globalMessage)},
         ${hasActionableSuggestions && process.env.EMBER_GLOBAL_DEPRECATIONS !== 'all'}
       );
 
-      {
-        let disabled = false;
-
-        let once = ${
-          hasActionableSuggestions &&
-          process.env.EMBER_RUNLOOP_AND_COMPUTED_DOT_ACCESS_DEPRECATIONS !== 'all'
-        };
-
-        let _onDotAccess = ${onDotAccess};
-
-        let onDotAccess = (...args) => {
+      (function(disabled, once, _onDotAccess) {
+        var onDotAccess = function () {
           if (disabled) {
             return null;
           } else {
             disabled = once;
-            return _onDotAccess(...args);
+            return _onDotAccess.apply(undefined, arguments);
           }
         };
 
         require('@ember/object')._onDotAccess(onDotAccess);
 
         require('@ember/runloop')._onDotAccess(onDotAccess);
-      }
+      })(
+        false,
+        ${
+          hasActionableSuggestions &&
+          process.env.EMBER_RUNLOOP_AND_COMPUTED_DOT_ACCESS_DEPRECATIONS !== 'all'
+        },
+        ${onDotAccess}
+      );
     `;
   },
 };