originally run directly in the browser (Chrome 65) will report ReferenceError errors, but after babel conversion, and then run, it will be undefined, these two errors are completely different, does it mean that the conversion of babel is not complete? ...

The project has a reference to a plug-in plugin , and Object.entries is called in the plug-in. index.js import Plugin from plugin ; xxx... .babelrc { "presets": [ ["env", { "modules"...

A plug-in is referenced in the project, because the plug-in has already been compiled through babel, but Object.entries has not been compiled, so you need to compile it yourself through babel. .babelrc { "presets": [ ["e...

computer version of Safari, Firefox reports an error: Safari: chrome browser is completely normal, and no other browsers can be used. import { combineReducers ,createStore,applyMiddleware,compose} from redux import thunk from redux-thunk i...

what does this path refer to? I didn t understand it. I thought it was the path to the imported file, but look at the source code, this path also has a find method. ...

babel ES7 decorator plug-in, it seems that can only be used on Class, how to break? ...

main.js webpack.base.conf.js in package.json seek God s solution, Google has not found a suitable solution for a long time ...

with this setting, babel-preset-env does not seem to read the contents of the configuration file .browserslistrc. but autoprefixer is readable Why, please be instructed by God ...

to use es2017 s asynchronous functions in your project. so when using gulp to process js files, I used babel-preset-env and babel-plugin-transform-runtime . the require syntax of nodejs appears after parsing, so the browser reported an...

< H2 > question < H2 > antd-mobile,`babel-plugin-transform-runtime`, then try to import and keep reporting an error after using the plugins definition in the babelrc file. < H2 > part of the profile code < H2 > java programmer s tough request...

...

transform-class-properties mainly solves the problem that is not supported by defaultProps= {} in the declaration of using class in es6. needs to be escaped using stage-0 or the plug-in. < H2 > question: < H2 > { spec:true false } < H2 > refere...

I was testing the JavaScript script with Jest, using ES6 Modules, so I used babel to convert ESM to CommonJS, but prompted me to turn it off when Rollup was packaged. Now after opening it, you can t run Rollup,. If you close it, you can t run ESM in J...

The project introduces the Plyr video player component. An error has been reported in the vivo old model chrome 39 kernel, and it is found that Array.prototype.find is not supported. The solution is Plyr provides polyfilled version, import ...

package.json is configured with "scripts ": { "build": "babel src -d lib" } ...

< H1 > question < H1 > first describe the problem: the current project uses TypeScript, to configure tsconfig.json. Then use webpack + ts-loader to package. now I d like to ask what tsconfig.json and ts-loader do, and whether you need to add the ex...

first of all, import is not supported before Node 9. I made it possible to use import, in Node by introducing babel-cli and babel-preset-es2015 , but I still had a problem when importing axios. I didn t add a path when I import, which is similar...

Use babel-polyfill to report errors under ie9 htmlscript ie10 ie9 ...

here s the problem. The es6 specification for writing code at the front end. Browsers do not fully support . The problem arises when uses babel transformations. Babel can not directly transfer the code used by the browser, must use other tools? Peopl...

var babel = require( babel-core ); var t = require( babel-types ); const visitor = {} visitor.JSXElement = function(path) { ... } module.exports = function(babel) { return { visitor }; } var babel = require( babel-core ); c...