We want to write a Babel Plugin, which move 'const versionRegex = /(/d+)\.(/d+)\.(/d+)/gi' out of function scope and put it into global scope. Code: function getVersion(versionString) { const versionRegex = /(\d+)\.(\d+)\.(\d+)/gi var x = /foo/.text(
For example we have current code: function add(a, b) { console.log(a, b) return a + b } function subtract(a, b) { console.log(a, b) return a - b } add(, ) subtract(, ) console.log('sup dawg') We want to transform the code to: function add(a, b) { con
卧槽,原谅我这么晚还在写blog,明天早上还要上班. 问题,idea 新建springmvc无法自动下载lib,报这个: you have JVM property "https.proxyHost" set to 127.0.0.1". This may lead to incorrect behaviour, Proxy should be set in Setting 最后的解决的方案: 1.重启电脑,不管用. 2.设置正确的proxy.. 关于2,如果设置正确的htt
The code we want to trasform: 2 ** 3; a ** b; a **b * c; a ** b ** c; (a+1) ** (b+1); transform to: Math.pow(2, 3); Math.pow(a, b); Math.pow(a, b) * c; Math.pow(a, Math.pow(b, c)); Math.pow(a+1, b+1); Code: export default function (babel) { const { t
a = () => {}, // Support for the experimental syntax 'classProperties' isn't currently enabled yarn add @babel/plugin-proposal-class-properties --dev @babel/plugin-transform-runtime 有async await 时候, 要用中间件 redux-thunk
Continue with previous post: https://www.cnblogs.com/Answer1215/p/12342540.html Now we need to think about functionExpression and ArrowFunction: function add(a, b) { console.log(a, b) return a + b } function subtract(a, b) { console.log(a, b) return
个人总结:读完这篇文章需要15分钟,文章主要讲解了Babel和TypeScript的工作原理,(例如对es6 类的转换,是将原始es6代码转换为es5代码,这些代码中包含着类似于 _classCallCheck 和 _createClass这样的函数,而这些函数已经在Babel和TypeScript的标准库中预先定义好了,然后进行处理). 顺便温习了Object.create这个方法, 比如有一个obj:{name:'是ho',f:function(){alert(1)}} var a = O
In this lesson we'll learn about how you can use the prop-types module to validate a custom React component's props. You can write you own PropTypes vlidators like such: const PropTypes = { string(props, propName, componentName) { if(typeof props[pro
To write a simple Babel plugin, we can use http://astexplorer.net/ to help us. The plugin we want to write is: var foo = 'o' var bar = 'o' foo === bar function foo(foo, bar) { foo === bar; } We want to trasnform the code which highlighted in foo() fu