in nodejs, each file is a module, but is isolated by default how to ask nodejs not only...
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CommonJS module & module wrapper & module caching -
Nodejs behind the sceneJS has no capability of controlling network or file system (this language doesn't do th...
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typing hooksuseState: simple state values when initial value is only know at a future point in time...
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why TypeScripttypes are associated with run-time valaues type checking is not done in runtime but bef...
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typing react propshttps://react-typescript-cheatsheet.netlify.app/docs/basic/getting-started/basic_type_e...
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HOCcomponent transforms props into UI, HOC transforms component into another component. co...
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this in 7 casesGlobal Context: (outside of any function), this refers to the global object, which is...
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try catch finally
In atry...catch...finallyscenario, thefinally[https://developer.mozilla.org/en-US/docs/...
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Object to Primitive conversion: valueOf/toString
Object to Primitive Conversion: In JavaScript, when you use an object in a context wher...
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catch()为参数创建块作用域
try中捕获到错误以后，会把异常对象推入一个可变对象并置于作用域的头部。在catch代码块内部，函数的所有局部变量将会被放在第二个作用域对象中，catch中的代码执行完，会立...
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sass-loader和less-loader
这两个loader看名字也能猜到，用来处理sass和less样式的。 安装：npm i -D sass-loader less-loader 在config中进行配置，代码在...
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babel-loader: transpile modern js
写完代码发现自己的js代码不能运行在IE10或者IE11上，然后尝试着引入各种polyfill babel的出现提供了便利，将高版本的ES6甚至ES7转为ES5，兼容低版本浏...
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useState: async/copy then setState/arrow func if based on previous stateReact hooks are used by functional components to provide the same functionality as clas...
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useReducerThen you can replace useState: useReducer is very similar to useState[https://react.dev...
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render order vs mount order
Therender orderis executed in the order of the react component tree, however, themount ...
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component composition with props.childrenfunction A({children}){ console.log("A"); const [state, setState]=useState(0); useEffec...
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shallow copy vs deep clone对象复制：分类讨论 1.可以用lodash 2.不能用库，可以用浏览器自带api，structuredClone const obj1 = { a: 0, b: { c: 0...
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Function Composition: compose/pipehttps://www.educative.io/answers/function-composition-in-javascript Function compositio...
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reduceRight((acc, curVal, index, array)ThereduceRight()method ofArray[https://developer.mozilla.org/en-US/docs/Web/JavaScript/...