Tips for ensuring that my Angular 4 code runs smoothly on Firefox browsers

After successfully testing my angular 4 code in the Chrome browser, I encountered an error when trying to open it in Firefox.

ERROR TypeError: hostEl.createShadowRoot is not a function
Stack trace:
ShadowDomRenderer@http://localhost:4200/vendor.bundle.js:166030:28
../../../platform-browser/@angular/platform-browser.es5.js/DomRendererFactory2.prototype.createRenderer@http://localhost:4200/vendor.bundle.js:165743:24
../../../platform-browser/@angular/platform-browser/animations.es5.js/AnimationRendererFactory.prototype.createRenderer@http://localhost:4200/vendor.bundle.js:167745:41
../../../core/@angular/core.es5.js/</DebugRendererFactory2.prototype.createRenderer@http://localhost:4200/vendor.bundle.js:127912:35
createComponentView@http://localhost:4200/vendor.bundle.js:126511:24
callWithDebugContext@http://localhost:4200/vendor.bundle.js:127880:39
debugCreateComponentView@http://localhost:4200/vendor.bundle.js:127237:12
createViewNodes@http://localhost:4200/vendor.bundle.js:126569:37
createRootView@http://localhost:4200/vendor.bundle.js:126494:5
callWithDebugContext@http://localhost:4200/vendor.bundle.js:127880:39
debugCreateRootView@http://localhost:4200/vendor.bundle.js:127197:12

Although I have utilized ViewEncapsulation.Native in my code, I am struggling to remove it. One suggested solution is to employ polyfills to prevent this issue, yet my index.html file (located in the dist folder) already includes a polyfills file.

I would appreciate any guidance on how to resolve this compatibility issue with Firefox.

angulartypescript

Answer №1

If you are utilizing (ViewEncapsulation.Native) encapsulation for native shadow DOM, it's important to note that this feature is only supported in Chrome. You can either use emulated encapsulation or consider integrating the polyfills provided by webcomponents.org for compatibility with other browsers. As far as I'm aware, these are your main options available. You can install the polyfills using the following command:

npm install @webcomponents/webcomponentsjs

You can also make use of 'webcomponents-sd-ce' for custom elements and shadow DOM integration: simply add the following line to your polyfills.ts file:

import '@webcomponents/webcomponentsjs/webcomponents-sd-ce.js';

Answer №2

I found a solution that worked by following the instructions on this link: 

https://github.com/angular/angular/issues/6531

To fix the issue, I removed ViewEncapsulation.None or ViewEncapsulation.Native from all the TypeScript files.

I also made sure to add any CSS files to the index.html file.

Trying other solutions using polyfills did not work and resulted in the same error appearing from jquery-2.1.3.min.js file.

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