Provide Internet Explorer support Permalink to "Provide Internet Explorer support"

Tip submitted by @wmarques & @anthony-o

JHipster supports only evergreen browsers. However you can still easily support some older browsers like Internet Explorer.

In order to do that you have to:

1. Set target to es5 in your tsconfig
2. Then you have two options:
   1. Add the correct polyfills from ‘core-js’, if you don’t know which one you should use, check the Angular CLI project and their polyfills.
   2. Or use babel + Babel preset-env to automatically import the correct core-js polyfills based on a browserslist file.

Full tip using Babel Permalink to "Full tip using Babel"

First, add those package.json dependencies: @babel/core, @babel/preset-env and babel-loader. Example with yarn: bash yarn add @babel/core @babel/preset-env babel-loader --exact --dev (tested with the following versions for a working IE11 version on a JHipster v6.3.1 generated application: json "@babel/core": "7.6.4", "@babel/preset-env": "7.6.3", "babel-loader": "8.0.6", )

Now add the following lines at the top of src/main/webapp/app/polyfills.ts: ts import 'core-js/stable'; import 'regenerator-runtime/runtime';

In webpack/webpack.common.js, after js { test: /manifest.webapp$/, loader: 'file-loader', options: { name: 'manifest.webapp' } }, add the following lines: js { test: /\.js/, use: { loader: 'babel-loader', options: { "presets": [ [ "@babel/preset-env", { "targets": { "firefox": "60", "ie": "11" }, "useBuiltIns": "entry", "corejs": 3 } ] ] } }, exclude: /@babel(?:\/|\\{1,2})runtime|core-js/, },

And finally, change target to es5 in tsconfig.json & tsconfig-aot.json.

See this GitHub issue & this SO answer for more details.