定义和用法
replace() 方法用于在字符串中用一些字符替换另一些字符,或替换一个与正则表达式匹配的子串。
语法
stringObject.replace(regexp/substr,replacement)
实例
例子 1
在本例中,我们将使用 "W3School" 替换字符串中的 "Microsoft":
<script type="text/javascript">
var str="Visit Microsoft!"
document.write(str.replace(/Microsoft/, "W3School")
)
</script>
输出:
Visit W3School!
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 "W3School":
<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, "W3School")
)
</script>
输出:
Welcome to W3School! We are proud to announce that W3School has one of the largest Web Developers sites in the world.
参考:
http://www.w3school.com.cn/jsref/jsref_replace.asp
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