JavaScript String search()用法及代码示例

字符串 search() 方法

search() is method 是一个 String 方法，用于检查给定字符串中是否存在子字符串。它从子字符串所在的字符串返回子字符串的起始索引。如果字符串中不存在子字符串 – 则返回 -1。

用法:

    String.search(substring);

这里，substring是要搜索的字符串的一部分。

例：

<html>
<head>
<title>JavaScipt Example</title>
</head>

<body>
<script>		
	var str = "friends say Hello";
	
	var substr = "Hello";		
	var index = str.search(substr);
	if(index!=-1)
		document.write(substr + " found at " + index + " position.<br>");
	else
		document.write(substr + " does not exist in the " + str + ".<br>");

	substr = "Hi";
	index = str.search(substr);		
	if(index!=-1)
		document.write(substr + " found at " + index + " position.<br>");
	else
		document.write(substr + " does not exist in the " + str + ".<br>");	
</script>
</body>
</html>

输出

Hello found at 12 position.
Hi does not exist in the friends say Hello.

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注：本文由纯净天空筛选整理自 String search() Method with Example in JavaScript。非经特殊声明，原始代码版权归原作者所有，本译文未经允许或授权，请勿转载或复制。