您可以在 JavaScript 中设置和/或更改用户的文本选择吗？
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Can you set and/or change the user’s text selection in JavaScript?
提问by Paul D. Waite
In JavaScript, there are various methods for accessing the user's text selection, and creating text selections (or ranges) — see http://www.quirksmode.org/dom/range_intro.html.
在 JavaScript 中，有多种方法可以访问用户的文本选择和创建文本选择（或范围）——请参阅http://www.quirksmode.org/dom/range_intro.html。
As per that page, you can programmatically create a range, and access the text within that. But doing this doesn't change the user's text selection, or make the user have some selected text if they don't already.
根据该页面，您可以以编程方式创建一个范围，并访问其中的文本。但是这样做不会改变用户的文本选择，或者让用户选择一些文本，如果他们还没有的话。
Can you set and/or change the user's text selection in JavaScript?
您可以在 JavaScript 中设置和/或更改用户的文本选择吗？
回答by Tim Down
Yes. In all browsers you can get one or more Ranges or a TextRangefrom the user's selection, and both Rangeand TextRangehave methods for changing the contents of the range.
是的。在所有的浏览器，你可以得到一个或多个RangeS或ATextRange从用户的选择，都Range和TextRange对改变区域的内容的方法。
UPDATE
更新
You can set the user's selection by creating a Rangeand adding it to the Selectionobject in most browsers and by creating a TextRangeand calling its select()method in IE <= 8.
您可以通过在大多数浏览器中创建 a并将其Range添加到Selection对象中以及通过在 IE <= 8 中创建 aTextRange并调用其select()方法来设置用户的选择。
For example, to set the selection to encompass the contents of an element:
例如，要将选择设置为包含元素的内容：
function selectElementContents(el) {
if (window.getSelection && document.createRange) {
var sel = window.getSelection();
var range = document.createRange();
range.selectNodeContents(el);
sel.removeAllRanges();
sel.addRange(range);
} else if (document.selection && document.body.createTextRange) {
var textRange = document.body.createTextRange();
textRange.moveToElementText(el);
textRange.select();
}
}
There are also several methods of the Selectionobject that can be used to change the user's selection in non-IE browsers. If you can be more specific about how you want to change the selection then it will be easier to help.
该Selection对象还有多种方法可用于在非 IE 浏览器中更改用户的选择。如果您可以更具体地了解如何更改选择，那么帮助会更容易。
