如何使用javascript中的Range对象检查选择的节点? [英] How can I check the node of the selection using Range object in javascript?
问题描述
我想退出选择并检查选择的节点.我正在尝试以下代码.但我认为，我无法指向选择，因此代码失败.
<script type="text/javascript">函数选择AnchorNode(){if (window.getSelection) {//Firefox、Opera、Google Chrome 和 Safarivar selection = window.getSelection();如果(选择.anchorNode){var rangeToSelect = document.createRange();警报(选择.anchorNode.nodeName)；} 别的 {alert("您的浏览器不支持此示例！");}}<身体><button onclick="SelectAnchorNode();">点击查看！</button><br/><br/><div><div>这是第一行.</div><p>这是第二行.</p>您的代码中有一些错误，您缺少一个}"来关闭函数.
这也不会返回 true，因为选择是在按钮上而不是在锚点(链接)上进行的
试试这个代码(我知道这不是你想要的，但它可以让你的例子工作)
<头><script type="text/javascript">函数选择AnchorNode(){if (window.getSelection) {//Firefox、Opera、Google Chrome 和 Safarivar selection = window.getSelection();如果(选择.anchorNode){var rangeToSelect = document.createRange();警报(选择.anchorNode.nodeName)；} 别的 {alert("您的浏览器不支持此示例！");}}}<身体><a onclick="SelectAnchorNode();">点击查看！</a><br/><br/><div><div>这是第一行.</div><p>这是第二行.</p>如你所见，我用a"替换了button"，并添加了一个缺失的}"
编辑！
试试这一行，(我现在假设您想要获得用户所做的选择，并且您不想使用 javascript 创建选择?)
alert(selection.anchorNode.parentNode.nodeName);根据您开始选择的位置，您将获得不同的结果，您还需要首先检查是否选择了文本节点(因为我可以直接在正文中进行选择).但我希望这能让您更接近您的解决方案.
问候
托比亚斯
I want to retireve the selection and check the node of the selection. I'm trying following code. But I think, I'm not able to point to the selection and so the code fails.
<head>
<script type="text/javascript">
function SelectAnchorNode () {
if (window.getSelection) { // Firefox, Opera, Google Chrome and Safari
var selection = window.getSelection ();
if (selection.anchorNode) {
var rangeToSelect = document.createRange ();
alert(selection.anchorNode.nodeName);
} else {
alert ("Your browser does not support this example!");
}
}
</script>
</head>
<body>
<button onclick="SelectAnchorNode ();">Click to check!</button>
<br /><br />
<div>
<div>This is the first line.</div>
<p>This is the second line.</p>
</div>
</body>
You have some errors in your code, your missing a "}" to close the function.
Also this wont return true since the selection is made on a button and not on an anchor (link)
Try this code (I understand if this isn't what you want, but it makes your example work)
<html>
<head>
<script type="text/javascript">
function SelectAnchorNode () {
if (window.getSelection) { // Firefox, Opera, Google Chrome and Safari
var selection = window.getSelection();
if (selection.anchorNode) {
var rangeToSelect = document.createRange();
alert(selection.anchorNode.nodeName);
} else {
alert ("Your browser does not support this example!");
}
}
}
</script>
</head>
<body>
<a onclick="SelectAnchorNode();">Click to check!</a>
<br /><br />
<div>
<div>This is the first line.</div>
<p>This is the second line.</p>
</div>
As you can see I replaced "button" with "a", and added a missing "}"
EDIT!
Try this line instead, (I have now assumed that you want to get the selection made by the user, and that you don't want to create a selection with javascript?)
alert(selection.anchorNode.parentNode.nodeName);
Depending on where you start your selection you will get different results, you also need to first check if there was a text node selected or not (since I could make a selection directly in body). But I hope this brings you closer to your solution.
Regards
Tobias
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