How to use comments in javascript

How to use comments in JavaScript: 1. Single-line comments begin with [//], and any text between [//] and the end of the line will be ignored by JavaScript; 2. Multi-line comments begin with [*/ ] starts with [*/] and ends with [*/].

The operating environment of this tutorial: Windows 7 system, JavaScript version 1.8.5, DELL G3 computer.

How to use comments in javascript:

1. Single-line comments

Single-line comments start with // starts.

Any text between // and the end of the line will be ignored by JavaScript (will not be executed).

This example uses a single line comment before each line of code:

Example

// 改变标题：
 document.getElementById("myH").innerHTML = "我的第一张页面";
// 改变段落：
 document.getElementById("myP").innerHTML = "我的第一个段落。";

2. Multi-line comments

many Line comments start with /* and end with */.

Any text between /* and */ will be ignored by JavaScript.

This example uses multi-line comments (comment blocks) to explain the code:

Example

/*
 下面的代码会改变
 网页中
 id = "myH" 的标题
 以及 id = "myP" 的段落：
*/
document.getElementById("myH").innerHTML = "我的第一张页面";
document.getElementById("myP").innerHTML = "我的第一个段落。";

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