I'm getting below error while creating a new Angular application - npm WARN deprecated [email protected]: core-js@<3 is no longer maintained and not recommended for usage due to the number...

I came across an issue and found out its because Babel does not polyfill .at as default According to spec , Array.prototype.at is merely stage 4, and I already set browserslist to > 0.2%, which ...

I use babel 7.8.3 together with @babel/preset-env, useBuiltIns: 'usage' and corejs: 3. The documentation for @babel/preset-env is not clear to me. Do I need to add the following lines at the top ...

I'm trying to revive the build for an old, unmaintained library so that we can check in some changes (or publish a fork) that lets it play nicely with another updated library (namely Bootstrap 4, b...

I'm reducing my js bundle size and stumbled upon core-js. It takes around 62kB which represents ~24% of the whole package. I tried using @babel/preset-env, but wasn't able to shrink the size any f...

I am currently trying to debug my packed Webpack bundle. To improve compatibility, I use the babel plugin and corejs to make using async/await functions possible. I am also using the 'eval-source-m...

When running my tests with jest, I had the above error; Error: Uncaught [TypeError: array.map(...).flat is not a function] Following the solution from that issue, https://github.com/kulshekhar/t...

After updating to Angular 7.3.6, I get the following error on ng serve: ERROR in ./node_modules/@angular-devkit/build-angular/src/angular-cli-files/models/jit-polyfills.js Module not found: ...

Following on from this question I have set up my Webpack 4 config to handle babel-loader like this { module : { rules : [{ test : /\.js$/, // Some module should not be transpiled by Babel // ...

With my current config (see below), I'm getting this error: [object Error]{description: "Argument ob...", message: "Argument ob...", name: "TypeError", number: -2147418113, stack: "TypeError: ......

I am working on a react app bootstrapped using create-react-app and it works perfectly in Chrome but I cannot get it to work in IE11. Upon launching the app, I am getting the following error from ...

Using babel 7.5.5, core-js 3.1.4 and webpack 4.38.0, how can I exclude core-js from transpiling? I do not want to exclude node_modules altogether since I have libs that need transpiling If I use ...

Polyfill services like polyfill.io seem to be delivering only small feature detects to the browser and then lazy-load only the polyfills that are actually needed. As I understand the babel documen...