babel-polyfill | 易学教程

babel vs babel-core vs babel-loader vs babel-preset-2015 vs babel-preset-react vs babel-polyfill

阅读更多关于 babel vs babel-core vs babel-loader vs babel-preset-2015 vs babel-preset-react vs babel-polyfill

问题 I was setting up Webpack for my React project and got confused between babel , babel-core , babel-loader , babel-preset-2015 and babel-preset-react . I know that Babel is needed to transform ES7 or ES6 code to ES5 but in my package.json I have installed all these dependencies except Babel and they also as devDependencies . Can someone please explain what's the difference between all these and why all of them are needed for my project? Isn't there any single dependency to replace them all? And

react warning cannot set state when using promises

阅读更多关于 react warning cannot set state when using promises

问题 I'm trying to query the server to get list of nav items so I can build my menu on init. I've so far managed to create a static page with 3 contents on the home page, which includes header, sidebar and content. The sidebar is the menu which is different for different type of users so I need to retrieve the menu items on load. Error I receive is Can only update a mounted or mounting component. This usually means you called setState, replaceState, or forceUpdate on an unmounted component. This

How do I install the babel-polyfill library?

阅读更多关于 How do I install the babel-polyfill library?

I just started to use Babel to compile my ES6 javascript code into ES5. When I start to use Promises it looks like it's not working. The Babel website states support for promises via polyfills. Without any luck, I tried to add: require("babel/polyfill"); or import * as p from "babel/polyfill"; With that I'll get the following error on my app bootstrapping: Cannot find module 'babel/polyfill' I searched for the module but it seems I'm missing some fundamental thing here. I also tried to add the old and good bluebird NPM but it looks like it's not working. How to use the polyfills from Babel?

How do I install the babel-polyfill library?

阅读更多关于 How do I install the babel-polyfill library?

问题 I just started to use Babel to compile my ES6 javascript code into ES5. When I start to use Promises it looks like it's not working. The Babel website states support for promises via polyfills. Without any luck, I tried to add: require("babel/polyfill"); or import * as p from "babel/polyfill"; With that I'll get the following error on my app bootstrapping: Cannot find module 'babel/polyfill' I searched for the module but it seems I'm missing some fundamental thing here. I also tried to add