JavaScript范围出错 [英] JavaScript ranging gone wrong
问题描述
以下代码使我在Firefox中出现了一个非常奇怪的错误:
The following code gives me a really weird error in Firefox:
错误:未捕获的异常: [例外...索引或大小为 负数或大于允许值 金额"代码:"1" nsresult: "0x80530001 (NS_ERROR_DOM_INDEX_SIZE_ERR)" 位置:"file:///G:/test.html行: 13]
Error: uncaught exception: [Exception... "Index or size is negative or greater than the allowed amount" code: "1" nsresult: "0x80530001 (NS_ERROR_DOM_INDEX_SIZE_ERR)" location: "file:///G:/test.html Line: 13"]
<html>
<head>
<title>test</title>
<script>
function xxx() {
var myList = document.getElementsByTagName("div");
var range = document.createRange();
var start = myList[0];
var end = myList[0];
range.setStart(start, 1); // Edit: this is (presumably) line 13
range.setEnd(end, 3);
window.getSelection().addRange(range);
}
</script>
</head>
<body onload="xxx();">
<div>abcddasdsadasda</div>
<div>2312321</div>
</body>
</html>
我在做什么错了?
谢谢.
推荐答案
您需要扩展功能xxx以支持IE，而目前它尚不支持. document.createRange和window.getSelection函数在此环境中似乎不起作用.
You need to expand function xxx to support IE, which it currently doesn't. The document.createRange and window.getSelection functions do not appear to work within this environment.
怎么样:
function xxx()
{
var myList = document.getElementsByTagName("div");
if(window.getSelection)
{
var range = document.createRange();
var start = myList[0];
var end = myList[0];
range.setStart(start, 0);
range.setEnd(end, 1);
window.getSelection().addRange(range);
}
else
if(document.selection)
{
document.selection.empty();
var txt = document.body.createTextRange();
txt.moveToElementText(myList[0]);
txt.setEndPoint("EndToEnd", txt);
var start;
txt.moveStart('character', start);
if (length + start > myList[0].innerHTML.length)
{
length = myList[0].innerHTML.length - start;
}
txt.moveEnd('character', -(myList[0].innerHTML.length - start - length));
txt.select();
}
}
代码将选择整个DIV元素的文本.您需要弄乱端点才能使它仅选择该范围的一部分.
The code will select the entire DIV element's text. You'll need to fiddle with the endpoints to get this to select only a portion of this range.
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