JS入门代码集合第1/4页

2024-05-06 14:17:59

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基础知识：HTML
JavaScript就这么回事1：基础知识

1 创建脚本块

1: <script language=”JavaScript”>
2: JavaScript code goes here
3: </script>
2 隐藏脚本代码
1: <script language=”JavaScript”>
2: 
5: </script>
在不支持JavaScript的浏览器中将不执行相关代码
3 浏览器不支持的时候显示
1: <noscript>
2: Hello to the non-JavaScript browser.
3: </noscript>

4 链接外部脚本文件
1: <script language=”JavaScript” src="/”filename.js"”></script>

5 注释脚本
1: // This is a comment
2: document.write(“Hello”); // This is a comment
3: /*
4: All of this
5: is a comment
6: */

6 输出到浏览器
1: document.write(“<strong>Hello</strong>”);

7 定义变量
1: var myVariable = “some value”;

8 字符串相加
1: var myString = “String1” + “String2”;
9 字符串搜索
1: <script language=”JavaScript”>
2: 
7: </script>

10 字符串替换

1: thisVar.replace(“Monday”,”Friday”);

11 格式化字串

1: <script language=”JavaScript”>
2: <!--
3: var myVariable = “Hello there”;
4: document.write(myVariable.big() + “<br>”);
5: document.write(myVariable.blink() + “<br>”);
6: document.write(myVariable.bold() + “<br>”);
7: document.write(myVariable.fixed() + “<br>”);
8: document.write(myVariable.fontcolor(“red”) + “<br>”);

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