a. Using basic syntax of switch const month = 'may'; switch (thing) { case 'january': console.log('January has 31 days.'); break; case 'june': console.log('May has 30 days.'); break; case 'june': console.log('J
Syntax of the switch...case Statement switch (expression) { case value1: // code block to be executed // if expression matches value1 break; case value2: // code block to be executed // if expression matches value2 break; ... default: // code block to be executed // if expression...
JavaScript Switch statement is used to execute different set of statements based on different conditions. It is similar to If-Else statement, but excels in code simplicity and works greatly with numbers, characters and Strings. Syntax </> Copy switch(expression){ case value_1 : // set of st...
原文:7. JavaScript’s Syntax 译者:飞龙 协议:CC BY-NC-SA 4.0 JavaScript 的语法相当简单。本章描述了需要注意的事项。 语法概述 本节让你快速了解 JavaScript 的语法是什么样子的。 以下是五种基本类型的值: 布尔值: true false 数字: 1023 7.851 字符串: 'hello' "hello" 普通对象: { firstName: 'Jan...
Thedefaultkeyword specifies some code to run if there is no case match. There can only be one default keyword in a switch. Although this is optional, it is recommended that you use it, as it takes care of unexpected cases. Syntax
The switch statement is used to perform different actions based on different conditions.The JavaScript Switch StatementUse the switch statement to select one of many blocks of code to be executed.Syntaxswitch(expression) { case n: code block break; case n: code block break; default: default ...
JavaScript 语法 JavaScript 是一个程序语言。语法规则定义了语言结构。 JavaScript 语法 JavaScript 是一个脚本语言。 它是一个轻量级,但功能强大的编程语言。 JavaScript 字面量 在编程语言中,一般固定值称为字面量,如 3.14。 数字(Number)字面量 可以是整数
Syntax switch (expression) { case value1: //Statements executed when the result of expression matches value1 [break;] case value2: //Statements executed when the result of expression matches value2 [break;] ... case valueN: //Statements executed when the result of expression matches valueN...
case catch class const continue debugger default delete do else enum export extends false finally for function if implements import in instanceof interface let new null package private protected public return static super switch this throw true ...
babel 编译的第一步是把源码 parse 成抽象语法树 AST (Abstract Syntax Tree),后续对这个 AST 进行转换。(之所以叫抽象语法树是因为省略掉了源码中的分隔符、注释等内容) AST 也是有标准的,JS parser 的 AST 大多是 estree 标准,从 SpiderMonkey 的 AST 标准扩展而来。babel 的整个编译流程都是围绕 AST 来的,...