javascript string.lastIndexOf does not work with span innerHTML_问答_开发者

javascript string.lastIndexOf does not work with span innerHTML

开发者 https://www.devze.com 2023-01-05 16:46 出处：网络

look the below example. <html> <body> <form> <span id=\"spTest\">Your curre开发者_如何学Gont operation: Modify » newone</span>

look the below example.

<html>
<body>
<form>
<span id="spTest">Your curre开发者_如何学Gont operation: Modify &raquo; newone</span>
</form>
<script type="text/javascript">
var sp = document.getElementById("spTest");
var str = sp.innerHTML;
//var str = "Your current operation: Modify &raquo; newone";
alert(str)
var index = str.lastIndexOf("&raquo;");
alert(index);

</script>

</body>
</html>

the above example will popup the "index" value -1. If I uncomment the line ""Your current operation: Modify » newone";", the result will be 30.

So I think the reason is because I use the "innerHTML" to get the text. What else can i use the get text inside span and get the right index result?

Thanks

No, it has nothing to do with innerHTML. In the call to lastIndexOf, the » entity is not expanded as it is in the HTML code; instead it is considered as a raw string. Replace it with the actual character and it will work: