js中字符替换函数String.replace()使用技巧

2026-02-18 19:07:56

1、例子 1在本例中,我们将使用 "jb51.net" 替换字符串中的 "Microsoft":

<script type="text/javascript">

var str="Visit Microsoft!"

document.write(str.replace(/Microsoft/, "jb51.net"))

</script>

输出:

Visit jb51.net!

2、例子 2在本例中,我们将执行一次全局替换,每当 "Microsoft" 被找到,它就被替换为 "jb51.net":

<script type="text/javascript">

var str="Welcome to Microsoft! "

str=str + "We are proud to announce that Microsoft has "

str=str + "one of the largest Web Developers sites in the world."

document.write(str.replace(/Microsoft/g, "jb51.net"))

</script>

输出:

Welcome to jb51.net! We are proud to announce that jb51.net has one of the largest Web Developers sites in the world.

3、例子 3您可以使用本例提供的代码来确保匹配字符串大写字符的正确:

text = "javascript Tutorial";

text.replace(/javascript/i, "JavaScript");

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