Arrow Function.md Arrow Functions The basic syntax of an arrow function is as follows var fn = data => data; The code means : var fn = function( data ) { return data; } let getNumber = () => 42; console.log(typeof getNumber); console.log(getNumber()…

Default Function Parameters.md Default Function Parameters function getSum(a,b){ a = (a !== undefined) ? a : 1 ; b = (b !== undefined) ? b : 41; console.log(a+b); } getSum(); getSum(1,2); getSum (10); getSum(null, 6); In ES5,if the argument is not sp…

(x) => x + 相当于 function(x){ ; }; var ids = this.sels.map(item => item.id).join() var ids = this.sels.map(function(item,index){ return item.id }); //无参数的箭头函数 ; 等价于 }; //一个参数的箭头函数 var f = v => v; 等价于 var f = function(v) { return v; }; //2个参数的箭头函数 v…

例行声明:接下来的文字内容全部来自 Understanding ECMAScript 6,作者是Nicholas C.Zakas,也就是大名鼎鼎的Professional JavaScript for Web Developers(<JavaScript高级程序设计>)的作者.我很喜欢他的写作风格,所以在看了Understanding ECMAScript 6后试着自己写篇博客梳理一下,相当于简单地翻译和巩固一下吧.在此特别感谢Nicholas的原创,我只是一个小矮人,站在巨人的肩膀上,所以看…

[原创] 码路工人 大家好,这里是码路工人有力量,我是码路工人,你们是力量. 如果没用过CSharp的lambda 表达式,也没有了解过ES6,那第一眼看到这样代码什么感觉? /* eg.0 * function definition */ var arr = [1,2,3,5,8,13,21] arr.forEach(n => console.log(n)) 数组的forEach 方法里需要传入一个函数(没用过 CSharp 里委托 delegate 的也许会觉得奇怪,js 里参数竟然可以是一…

ES6 arrow function is somehow like CoffeeScirpt. CoffeeScript: //function call coffee = -> coffee() coffee=(message) -> coffee("Yo"), coffee "Yo" coffee=(message, other) -> coffee("Yo", 2), coffee "Yo", 2 N…

vue & lifecycle methods & this bug ES6 Arrow function & this bind bug bad fetchTableData: (url = ``, options = {}) => {} // arrow function & this bind bug! // fetchTableData: (url = ``, options = {}) => { fetchTableData (url = ``, op…

ES6 Arrow Function & this bug let accHeadings = document.querySelectorAll(`.accordionItemHeading`); // NodeList(3) // let accHeadings = [...document.querySelectorAll(`.accordionItemHeading`)]; for (let i = 0; i < accHeadings.length; i++) { accHeadi…

ES6 Arrow Function All In One this const log = console.log; const arrow_func = (args) => log(`args =`, args); // OR const arrow_func = args => log(`args =`, args); const arrow_func = (arg1, arg2) => { log(`args =`, args); // return void 0; } 应用场景…

ES6 arrow function vs ES5 function ES6 arrow function 与 ES5 function 区别 this refs xgqfrms 2012-2020 www.cnblogs.com 发布文章使用:只允许注册用户才可以访问!…