榜单
服务器优惠
AI论文
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_.flattenDeep
_.flattenDeep Browser Support Browser Support for Array.prototype.flat() _.flattenDeep Recursively flattens array. // Underscore/Lodash _ . flattenDeep ([ 1 , [ 2 , [ 3... -
Function.prototype.toString()
Function.prototype.toString() Function.prototype.toString() ES2019 对函数实例的toString() 方法做出了修改。 toString() 方法返回函数代码本身，以前会省略注释和空格。 function /* foo comment */ foo () {} ... -
16. Symbol.prototype.description
16. Symbol.prototype.description Please support this book: buy it or donate 16. Symbol.prototype.description This chapter describes the ES2019 feature “Symbol.prototype.d... -
optional-catch-binding
@babel/plugin-proposal-optional-catch-binding Examples Installation Usage With a configuration file (Recommended) Via CLI Via Node API References @babel/plugin-proposal-o... -
catch 命令的参数省略
catch 命令的参数省略 catch 命令的参数省略 JavaScript 语言的try...catch 结构，以前明确要求catch 命令后面必须跟参数，接受try 代码块抛出的错误对象。 try { // ... } catch ( err ) { // 处理错误 } 上面代码中，catch... -
json-strings
@babel/plugin-proposal-json-strings Examples Installation Usage With a configuration file (Recommended) Via CLI Via Node API References @babel/plugin-proposal-json-string... -
20. JSON superset
20. JSON superset Please support this book: buy it or donate 20. JSON superset This chapter covers the ES2019 feature “JSON superset ” by Richard Gibson) is at [stage 4](... -
Defined
Defined Defined JS is an implementation of the ECMAScript standard (version ES2019 as of this writing), which is guided by the TC39 committee and hosted by ECMA. It runs in bro... -
Backwards & Forwards
Backwards & Forwards Jumping the Gaps Filling the Gaps Backwards & Forwards One of the most foundational principles that guides JavaScript is preservation of backwards compat... -
实例方法：trimStart()，trimEnd()
实例方法：trimStart()，trimEnd() 实例方法：trimStart()，trimEnd() ES2019 对字符串实例新增了trimStart() 和trimEnd() 这两个方法。它们的行为与trim() 一致，trimStart() 消除字符串头部的空格，trimEnd() 消除尾部的空格。它们返回的都是新字符串，不会修改原始字...