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angularinternet-explorerangular12

Angular 12 warns about requested IE 11 support. Why?

After upgrading Angular from v.11 to v.12 I am getting the following warning:

Warning: Support was requested for IE 11 in the project's browserslist configuration. IE 11 support is deprecated since Angular v12. For more information, see https://angular.io/guide/browser-support

I don't have browserlist in my project. And in polyfill.ts everything related to IE is commented out. Where does Angular infer this request from?

Solution

  • I had the same issue. It's because of the missing browserslist config in your project.

    If the Angular CLI compiler doesn't find a .browserslistrc file or a browserslist config in your package.json it will use the default config from the browserslist project.

    At the moment (v 4.16.6) this is

    > 0.5%
last 2 versions
Firefox ESR
not dead

    which includes ie11-support.

    I would recommend you to a add a .browserslistrc, in the root direcotry of your application (meaning in the same directory as angular.json) with a default config. f.e:

    last 1 Chrome version
last 1 Firefox version
last 2 Edge major versions
last 2 Safari major versions
last 2 iOS major versions
Firefox ESR
not IE 11 # Angular supports IE 11 only as an opt-in. To opt-in, remove the 'not' prefix on this line.