什么是最好的方法(我假设最简单的方法)，以放置光标在文本的输入文本元素的末尾通过JavaScript -焦点已设置到元素?
当前回答
我想把光标放在一个“div”元素的末尾，其中contentteditable = true，我得到了一个解决方案与Xeoncross代码:
<input type="button" value="Paste HTML" onclick="document.getElementById('test').focus(); pasteHtmlAtCaret('<b>INSERTED</b>'); ">
<div id="test" contenteditable="true">
Here is some nice text
</div>
这个函数很神奇:
function pasteHtmlAtCaret(html) {
var sel, range;
if (window.getSelection) {
// IE9 and non-IE
sel = window.getSelection();
if (sel.getRangeAt && sel.rangeCount) {
range = sel.getRangeAt(0);
range.deleteContents();
// Range.createContextualFragment() would be useful here but is
// non-standard and not supported in all browsers (IE9, for one)
var el = document.createElement("div");
el.innerHTML = html;
var frag = document.createDocumentFragment(), node, lastNode;
while ( (node = el.firstChild) ) {
lastNode = frag.appendChild(node);
}
range.insertNode(frag);
// Preserve the selection
if (lastNode) {
range = range.cloneRange();
range.setStartAfter(lastNode);
range.collapse(true);
sel.removeAllRanges();
sel.addRange(range);
}
}
} else if (document.selection && document.selection.type != "Control") {
// IE < 9
document.selection.createRange().pasteHTML(html);
}
}
适用于大多数浏览器，请检查，这段代码将文本和焦点放在div元素(不是输入元素)文本的末尾
https://jsfiddle.net/Xeoncross/4tUDk/
谢谢,Xeoncross
其他回答
检查这个解决方案!
//fn setCurPosition $.fn.setCurPosition = function(pos) { this.focus(); this.each(function(index, elem) { if (elem.setSelectionRange) { elem.setSelectionRange(pos, pos); } else if (elem.createTextRange) { var range = elem.createTextRange(); range.collapse(true); range.moveEnd('character', pos); range.moveStart('character', pos); range.select(); } }); return this; }; // USAGE - Set Cursor ends $('#str1').setCurPosition($('#str1').val().length); // USAGE - Set Cursor at 7 position // $('#str2').setCurPosition(7); <script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script> <p>Set cursor at any position</p> <p><input type="text" id="str1" value="my string here" /></p> <p><input type="text" id="str2" value="my string here" /></p>
我也面临着同样的问题。这个终于对我有用了
jQuery.fn.putCursorAtEnd = = function() {
return this.each(function() {
// Cache references
var $el = $(this),
el = this;
// Only focus if input isn't already
if (!$el.is(":focus")) {
$el.focus();
}
// If this function exists... (IE 9+)
if (el.setSelectionRange) {
// Double the length because Opera is inconsistent about whether a carriage return is one character or two.
var len = $el.val().length * 2;
// Timeout seems to be required for Blink
setTimeout(function() {
el.setSelectionRange(len, len);
}, 1);
} else {
// As a fallback, replace the contents with itself
// Doesn't work in Chrome, but Chrome supports setSelectionRange
$el.val($el.val());
}
// Scroll to the bottom, in case we're in a tall textarea
// (Necessary for Firefox and Chrome)
this.scrollTop = 999999;
});
};
我们可以这样称呼它:
var searchInput = $("#searchInputOrTextarea");
searchInput
.putCursorAtEnd() // should be chainable
.on("focus", function() { // could be on any event
searchInput.putCursorAtEnd()
});
它适用于safari, IE, Chrome, Mozilla。在移动设备上，我没有尝试过这种方法。
我想把光标放在一个“div”元素的末尾，其中contentteditable = true，我得到了一个解决方案与Xeoncross代码:
<input type="button" value="Paste HTML" onclick="document.getElementById('test').focus(); pasteHtmlAtCaret('<b>INSERTED</b>'); ">
<div id="test" contenteditable="true">
Here is some nice text
</div>
这个函数很神奇:
function pasteHtmlAtCaret(html) {
var sel, range;
if (window.getSelection) {
// IE9 and non-IE
sel = window.getSelection();
if (sel.getRangeAt && sel.rangeCount) {
range = sel.getRangeAt(0);
range.deleteContents();
// Range.createContextualFragment() would be useful here but is
// non-standard and not supported in all browsers (IE9, for one)
var el = document.createElement("div");
el.innerHTML = html;
var frag = document.createDocumentFragment(), node, lastNode;
while ( (node = el.firstChild) ) {
lastNode = frag.appendChild(node);
}
range.insertNode(frag);
// Preserve the selection
if (lastNode) {
range = range.cloneRange();
range.setStartAfter(lastNode);
range.collapse(true);
sel.removeAllRanges();
sel.addRange(range);
}
}
} else if (document.selection && document.selection.type != "Control") {
// IE < 9
document.selection.createRange().pasteHTML(html);
}
}
适用于大多数浏览器，请检查，这段代码将文本和焦点放在div元素(不是输入元素)文本的末尾
https://jsfiddle.net/Xeoncross/4tUDk/
谢谢,Xeoncross
document.querySelector(“输入”)。addEventListener('focus'， e => { Const {value} = e.target; e.target.setSelectionRange(价值。长度,value.length); })； <input value="my text" />
在这之后，我发现最好的方法是使用setSelectionRange函数，如果浏览器支持它;如果不是，则恢复使用Mike Berrow回答中的方法(即将值替换为本身)。
我还将scrollTop设置为一个高值，以防我们在一个垂直滚动的文本区域。(在Firefox和Chrome中，使用任意的高值似乎比$(this).height()更可靠。)
我已经把它作为一个jQuery插件。(如果你没有使用jQuery，我相信你仍然可以很容易地得到主旨。)
我在IE6, IE7, IE8, Firefox 3.5.5，谷歌Chrome 3.0, Safari 4.0.4, Opera 10.00中进行了测试。
它可以在jquery网站上作为PutCursorAtEnd插件使用。为方便起见，1.0版的代码如下:
// jQuery plugin: PutCursorAtEnd 1.0
// http://plugins.jquery.com/project/PutCursorAtEnd
// by teedyay
//
// Puts the cursor at the end of a textbox/ textarea
// codesnippet: 691e18b1-f4f9-41b4-8fe8-bc8ee51b48d4
(function($)
{
jQuery.fn.putCursorAtEnd = function()
{
return this.each(function()
{
$(this).focus()
// If this function exists...
if (this.setSelectionRange)
{
// ... then use it
// (Doesn't work in IE)
// Double the length because Opera is inconsistent about whether a carriage return is one character or two. Sigh.
var len = $(this).val().length * 2;
this.setSelectionRange(len, len);
}
else
{
// ... otherwise replace the contents with itself
// (Doesn't work in Google Chrome)
$(this).val($(this).val());
}
// Scroll to the bottom, in case we're in a tall textarea
// (Necessary for Firefox and Google Chrome)
this.scrollTop = 999999;
});
};
})(jQuery);
