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代码的括号(前有分号;的问题
阅读量:673 次
发布时间:2019-03-16

本文共 411 字,大约阅读时间需要 1 分钟。

1、当我们在编写代码的时候,如果一行代码是以:括号 ( 、中括号 [ 、以及键盘上数字1左边的这个符号 ` 开头的时候,我们需要在前面补上一个分号用以避免一些语法解析错误。所以当我们会发现在一些第三方的代码中能看到一上来就以一个 ; 开头,举个例子如下:

;(function () {  console.log('hello')})();['开发', '测试'].forEach(function (item) {   console.log(item) })

2、 ` 是 EcmaScript 6 中新增的一种字符串包裹方式,叫做:模板字符串,它支持换行和非常方便拼接变量

var test= `            鹅、鹅、鹅,            曲项向天歌,            白毛浮绿水,            红掌拨清波。`console.log(test)  //  结果将按照我们规定的格式输出

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