babel

问题 Trying to unit test reactjs application using mocha but getting error from es6 features (import/export) used inside node_modules folder. The application in question is transpiled using babel but since one of react component is using a module from node_modules its throwing error Syntax Error:Unexpected token export . I am aware that babel ignores node_modules folder by default, but not sure how to approach this. Any help would be appreciated. Thanks. Test Command :- "test": "SET NODE_ENV=test&

问题 I have migrated my app to babel 7 beta and everything seems to work except the tests. I think I've read everything out there but I'm still getting this error: ● Test suite failed to run Requires Babel "^7.0.0-0", but was loaded with "6.26.0". If you are sure you have a compatible version of @babel/core, it is likely that something in your build process is loading the wrong version. Inspect the stack trace of this error to look for the first entry that doesn't mention "@babel/core" or "babel

问题 I have migrated my app to babel 7 beta and everything seems to work except the tests. I think I've read everything out there but I'm still getting this error: ● Test suite failed to run Requires Babel "^7.0.0-0", but was loaded with "6.26.0". If you are sure you have a compatible version of @babel/core, it is likely that something in your build process is loading the wrong version. Inspect the stack trace of this error to look for the first entry that doesn't mention "@babel/core" or "babel

问题 I have problem with Safari version <= 9. Babel doesn't seem to replace const with var. I get this error in console: Unexpected keyword 'const'. Const declarations are not supported in strict mode. I tried using @babel/preset-stage-0 but babel removed it. This is my app configuration: .babelrc { "presets": [ "@babel/preset-env", "@babel/preset-react" ], "plugins": [ "@babel/plugin-transform-object-assign" ] } webpack.config.js const path = require("path"); const webpack = require("webpack");

问题 I have problem with Safari version <= 9. Babel doesn't seem to replace const with var. I get this error in console: Unexpected keyword 'const'. Const declarations are not supported in strict mode. I tried using @babel/preset-stage-0 but babel removed it. This is my app configuration: .babelrc { "presets": [ "@babel/preset-env", "@babel/preset-react" ], "plugins": [ "@babel/plugin-transform-object-assign" ] } webpack.config.js const path = require("path"); const webpack = require("webpack");

问题 DISCLAIMER: I'm not terribly familiar with webpack or babel outside of simple setup, so if the question isn't clear then I apologize and will do my best to offer further clarity. So, the situation currently is that a coworker updated a bunch of packages recently, babel among them, and babel is no longer transpiling the code properly for .forEach and spread operators in ie11 (specifically when iterating over a node list). The resulting behavior is a bit frustrating; simply put, nothing happens

问题 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 // See https://github.com/zloirock/core-js/issues/743#issuecomment-572074215 exclude: ['/node_modules/', /\bcore-js\b/, /\bwebpack\/buildin\b/, /@babel\/runtime-corejs3/], loader : "babel-loader", options : { babelrc : false, // Fixes "TypeError: __webpack_require__(...) is not a function" // https://github

问题 I replaced babel-core with @babel/core while babel-loader expects babel-core : { "name": "myproject-ui", "version": "1.0.0", "description": "User interface for myproject", "main": "index.js", "scripts": { "start": "npx webpack-dev-server", "build": "npx webpack", "test": "echo \"Error: no test specified\" && exit 1" }, "author": "Hello", "license": "ISC", "devDependencies": { "@babel/core": "^7.0.0-rc.2", "@babel/plugin-proposal-object-rest-spread": "^7.0.0-rc.2", "@babel/preset-env": "^7.0.0

问题 Trying to set up Jest to test my React components (Technically I'm using Preact) but same idea... Anytime I try to get a coverage report, I get errors when it hits any jsx syntax. Error Running coverage on untested files...Failed to collect coverage from /index.js ERROR: /index.js: Unexpected token (52:2) 50 | 51 | render( > 52 | <Gallery images={images} />, | ^ I've tried following the docs and similar issues but no luck! It seems as though my babel settings aren't getting used by Jest. Any

问题 Trying to set up Jest to test my React components (Technically I'm using Preact) but same idea... Anytime I try to get a coverage report, I get errors when it hits any jsx syntax. Error Running coverage on untested files...Failed to collect coverage from /index.js ERROR: /index.js: Unexpected token (52:2) 50 | 51 | render( > 52 | <Gallery images={images} />, | ^ I've tried following the docs and similar issues but no luck! It seems as though my babel settings aren't getting used by Jest. Any