It is now read-only. The following ES6 modules create a real-time digital clock used to demonstrate Rollup.js processing. According to the docs the TypeScript Transpiler should be installed globally. This is a relevant snippet of my rollup.config.js: For some reason, the compiled file still contains lit-html ES6 code in it and this shouldn't be the case. The project is in maintenance mode but still works well. BabelJS - Transpile ES6 features to ES5 To learn more, see our tips on writing great answers. enjoy another stunning sunset 'over' a glass of assyrtiko. just by using an alias to tell WebPack to import the /es variants of MUI and letting babel-loader transpile the /es variant to it to ES5 that works in IE11, instead of having it transpile the pre-compiled ES5 version. If you do not provide a CommonJS shim in your browser then that explains why module.exports is undefined. // Include a custom plugin in the options. All worked beautifully for files in my src folder, they transpiled to ES5, but the files in the node_modules folder were left untouched. Bringing Modern JavaScript to Libraries - DEV Community Add a __POLYFILL__ token to the top of src/main.js: Then set it in the Rollup.js configuration in the ES5 "plugins" array: Run npx rollup --config to build both the ES6 build/bundle.mjs and ES5 build/bundle.js scripts. You can also return an array of objects to define multiple input and output operations: It may be practical to define an array even when returning a single object. The map is referenced as a comment at the end of ./build/bundle.js: Alternatively, you can create an inline source map with --sourcemap inline. Once build.target is set to ie11 the build process will start complaining that Esbuild is not ready to transpile quite some parts of your code to IE11 specification. Rollup TypeScript not properly targeting ES5 #3003 - Github What are the advantages of running a power tool on 240 V vs 120 V? The examples below specifically use npx rollup, since it will work regardless of whether rollup is installed locally or globally. Asking for help, clarification, or responding to other answers. I had the same issue after upgrade to the latest versions of rollup-plugin-vue, rollup-plugin-babel & etc.
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