JavaScript在粘贴事件中获取剪贴板数据（跨浏览器）
web应用程序如何检测粘贴事件并检索要粘贴的数据 我想在将文本粘贴到富文本编辑器之前删除HTML内容 在粘贴文本之后清理文本是可行的，但问题是所有以前的格式都会丢失。例如，我可以在编辑器中编写一个句子并将其加粗，但当我粘贴新文本时，所有格式都会丢失。我只想清理粘贴的文本，保留任何以前的格式不变 理想情况下，该解决方案应该适用于所有现代浏览器（如MSIE、Gecko、Chrome和Safari）JavaScript在粘贴事件中获取剪贴板数据（跨浏览器）,javascript,cross-browser,clipboard,Javascript,Cross Browser,Clipboard,web应用程序如何检测粘贴事件并检索要粘贴的数据 我想在将文本粘贴到富文本编辑器之前删除HTML内容 在粘贴文本之后清理文本是可行的，但问题是所有以前的格式都会丢失。例如，我可以在编辑器中编写一个句子并将其加粗，但当我粘贴新文本时，所有格式都会丢失。我只想清理粘贴的文本，保留任何以前的格式不变 理想情况下，该解决方案应该适用于所有现代浏览器（如MSIE、Gecko、Chrome和Safari） 请注意，MSIE有clipboardData.getData（），但我在其他浏览器中找不到类似的功能。
请注意，MSIE有
clipboardData.getData（）写下这个答案后，情况发生了变化：现在Firefox在版本22中增加了支持，所有主要浏览器现在都支持在粘贴事件中访问剪贴板数据。请参阅以获取示例。 在过去，这通常不可能以跨浏览器的方式实现。理想的情况是能够通过
pastedesignModefocus（）designModefunction onPasteMe(currentData, maxLen) {
// validate max length of pasted text
var totalCharacterCount = window.clipboardData.getData('Text').length;
}
<input type="text" onPaste="return onPasteMe(this, 50);" />
我在这里为Tim Downs提案编写了一个小的概念证明，带有屏幕外文本区。下面是代码：
<html>
<head>
<script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.4/jquery.min.js"></script>
<script language="JavaScript">
$(document).ready(function()
{
var ctrlDown = false;
var ctrlKey = 17, vKey = 86, cKey = 67;
$(document).keydown(function(e)
{
if (e.keyCode == ctrlKey) ctrlDown = true;
}).keyup(function(e)
{
if (e.keyCode == ctrlKey) ctrlDown = false;
});
$(".capture-paste").keydown(function(e)
{
if (ctrlDown && (e.keyCode == vKey || e.keyCode == cKey)){
$("#area").css("display","block");
$("#area").focus();
}
});
$(".capture-paste").keyup(function(e)
{
if (ctrlDown && (e.keyCode == vKey || e.keyCode == cKey)){
$("#area").blur();
//do your sanitation check or whatever stuff here
$("#paste-output").text($("#area").val());
$("#area").val("");
$("#area").css("display","none");
}
});
});
</script>
</head>
<body class="capture-paste">
<div id="paste-output"></div>
<div>
<textarea id="area" style="display: none; position: absolute; left: -99em;"></textarea>
</div>
</body>
</html>
$（文档）.ready（函数（）
{
var ctrlDown=false；
var ctrlKey=17，vKey=86，cKey=67；
$（文档）.keydown（函数（e）
{
如果（e.keyCode==ctrlKey）ctrlDown=true；
}).keyup（功能（e）
{
如果（e.keyCode==ctrlKey）ctrlDown=false；
});
$（“.capture-paste”）.keydown（函数（e）
{
if（ctrlDown&（e.keyCode==vKey | | e.keyCode==cKey））{
$（“#区域”）.css（“显示”、“块”）；
$（“#面积”）.focus（）；
}
});
$（“.capture-paste”）.keyup（函数（e）
{
如果（ctrlDown&（e.keyCode==vKey | | e.keyCode==cKey））{
$（“#面积”）.blur（）；
//你在这里做卫生检查什么的
$（“#粘贴输出”）.text（$（“#区域”）.val（））；
$（“#面积”）.val（“”）；
$（“#面积”）.css（“显示”、“无”）；
}
});
});
请随意使用此代码，如果您有一些改进或问题，请将其发回。还要注意的是，我不是Javascript开发人员，所以我可能错过了一些东西（=>自己做测试）。这一个没有使用任何setTimeout（） 我使用了很棒的文章来实现跨浏览器支持
$(document).on("focus", "input[type=text],textarea", function (e) {
var t = e.target;
if (!$(t).data("EventListenerSet")) {
//get length of field before paste
var keyup = function () {
$(this).data("lastLength", $(this).val().length);
};
$(t).data("lastLength", $(t).val().length);
//catch paste event
var paste = function () {
$(this).data("paste", 1);//Opera 11.11+
};
//process modified data, if paste occured
var func = function () {
if ($(this).data("paste")) {
alert(this.value.substr($(this).data("lastLength")));
$(this).data("paste", 0);
this.value = this.value.substr(0, $(this).data("lastLength"));
$(t).data("lastLength", $(t).val().length);
}
};
if (window.addEventListener) {
t.addEventListener('keyup', keyup, false);
t.addEventListener('paste', paste, false);
t.addEventListener('input', func, false);
}
else {//IE
t.attachEvent('onkeyup', function () {
keyup.call(t);
});
t.attachEvent('onpaste', function () {
paste.call(t);
});
t.attachEvent('onpropertychange', function () {
func.call(t);
});
}
$(t).data("EventListenerSet", 1);
}
});
对于清理粘贴的文本和用粘贴的文本替换当前选定的文本来说，事情非常简单：
<div id='div' contenteditable='true' onpaste='handlepaste(this, event)'>Paste</div>
简单版：
document.querySelector('[contenteditable]').addEventListener('paste', (e) => {
e.preventDefault();
const text = (e.originalEvent || e).clipboardData.getData('text/plain');
window.document.execCommand('insertText', false, text);
});
剪贴板数据注意：记住检查服务器端的输入/输出同样（就像）您可以这样做
<html>
<head>
<script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.4/jquery.min.js"></script>
<script language="JavaScript">
$(document).ready(function()
{
var ctrlDown = false;
var ctrlKey = 17, vKey = 86, cKey = 67;
$(document).keydown(function(e)
{
if (e.keyCode == ctrlKey) ctrlDown = true;
}).keyup(function(e)
{
if (e.keyCode == ctrlKey) ctrlDown = false;
});
$(".capture-paste").keydown(function(e)
{
if (ctrlDown && (e.keyCode == vKey || e.keyCode == cKey)){
$("#area").css("display","block");
$("#area").focus();
}
});
$(".capture-paste").keyup(function(e)
{
if (ctrlDown && (e.keyCode == vKey || e.keyCode == cKey)){
$("#area").blur();
//do your sanitation check or whatever stuff here
$("#paste-output").text($("#area").val());
$("#area").val("");
$("#area").css("display","none");
}
});
});
</script>
</head>
<body class="capture-paste">
<div id="paste-output"></div>
<div>
<textarea id="area" style="display: none; position: absolute; left: -99em;"></textarea>
</div>
</body>
</html>
$(document).on("focus", "input[type=text],textarea", function (e) {
var t = e.target;
if (!$(t).data("EventListenerSet")) {
//get length of field before paste
var keyup = function () {
$(this).data("lastLength", $(this).val().length);
};
$(t).data("lastLength", $(t).val().length);
//catch paste event
var paste = function () {
$(this).data("paste", 1);//Opera 11.11+
};
//process modified data, if paste occured
var func = function () {
if ($(this).data("paste")) {
alert(this.value.substr($(this).data("lastLength")));
$(this).data("paste", 0);
this.value = this.value.substr(0, $(this).data("lastLength"));
$(t).data("lastLength", $(t).val().length);
}
};
if (window.addEventListener) {
t.addEventListener('keyup', keyup, false);
t.addEventListener('paste', paste, false);
t.addEventListener('input', func, false);
}
else {//IE
t.attachEvent('onkeyup', function () {
keyup.call(t);
});
t.attachEvent('onpaste', function () {
paste.call(t);
});
t.attachEvent('onpropertychange', function () {
func.call(t);
});
}
$(t).data("EventListenerSet", 1);
}
});
<div id='div' contenteditable='true' onpaste='handlepaste(this, event)'>Paste</div>
function handlepaste(el, e) {
document.execCommand('insertText', false, e.clipboardData.getData('text/plain'));
e.preventDefault();
}
document.querySelector('[contenteditable]').addEventListener('paste', (e) => {
e.preventDefault();
const text = (e.originalEvent || e).clipboardData.getData('text/plain');
window.document.execCommand('insertText', false, text);
});
$.fn.pasteEvents = function( delay ) {
if (delay == undefined) delay = 20;
return $(this).each(function() {
var $el = $(this);
$el.on("paste", function() {
$el.trigger("prepaste");
setTimeout(function() { $el.trigger("postpaste"); }, delay);
});
});
};
$('#txt').on("prepaste", function() {
$(this).find("*").each(function(){
var tmp=new Date.getTime();
$(this).data("uid",tmp);
});
}).pasteEvents();
$('#txt').on("postpaste", function() {
$(this).find("*").each(function(){
if(!$(this).data("uid")){
$(this).removeClass();
$(this).removeAttr("style id");
}
});
}).pasteEvents();
$("#editText").on("paste", function (e) {
e.preventDefault();
var text;
var clp = (e.originalEvent || e).clipboardData;
if (clp === undefined || clp === null) {
text = window.clipboardData.getData("text") || "";
if (text !== "") {
if (window.getSelection) {
var newNode = document.createElement("span");
newNode.innerHTML = text;
window.getSelection().getRangeAt(0).insertNode(newNode);
} else {
document.selection.createRange().pasteHTML(text);
}
}
} else {
text = clp.getData('text/plain') || "";
if (text !== "") {
document.execCommand('insertText', false, text);
}
}
});
onPaste: function() {
var oThis = this;
setTimeout(function() { // Defer until onPaste() is done
console.log('paste', oThis.input.value);
// Manipulate pasted input
}, 1);
}
$('#dom').on('paste',function (e){
setTimeout(function(){
console.log(e.currentTarget.value);
},0);
});
<div contenteditable="true" id="target_paste_element"></div>
document.getElementById("target_paste_element").addEventListener("paste", pasteEventVerifierEditor.bind(window, pasteCallBack), false);
function pasteEventVerifierEditor(callback, e)
{
//is fired on a paste event.
//pastes content into another contenteditable div, mutation observer observes this, content get pasted, dom tree is copied and can be referenced through call back.
//create temp div
//save the caret position.
savedCaret = saveSelection(document.getElementById("target_paste_element"));
var tempDiv = document.createElement("div");
tempDiv.id = "id_tempDiv_paste_editor";
//tempDiv.style.display = "none";
document.body.appendChild(tempDiv);
tempDiv.contentEditable = "true";
tempDiv.focus();
//we have to wait for the change to occur.
//attach a mutation observer
if (window['MutationObserver'])
{
//this is new functionality
//observer is present in firefox/chrome and IE11
// select the target node
// create an observer instance
tempDiv.observer = new MutationObserver(pasteMutationObserver.bind(window, callback));
// configuration of the observer:
var config = { attributes: false, childList: true, characterData: true, subtree: true };
// pass in the target node, as well as the observer options
tempDiv.observer.observe(tempDiv, config);
}
}
function pasteMutationObserver(callback)
{
document.getElementById("id_tempDiv_paste_editor").observer.disconnect();
delete document.getElementById("id_tempDiv_paste_editor").observer;
if (callback)
{
//return the copied dom tree to the supplied callback.
//copy to avoid closures.
callback.apply(document.getElementById("id_tempDiv_paste_editor").cloneNode(true));
}
document.body.removeChild(document.getElementById("id_tempDiv_paste_editor"));
}
function pasteCallBack()
{
//paste the content into the element.
restoreSelection(document.getElementById("target_paste_element"), savedCaret);
delete savedCaret;
pasteHtmlAtCaret(this.innerHTML, false, true);
}
saveSelection = function(containerEl) {
if (containerEl == document.activeElement)
{
var range = window.getSelection().getRangeAt(0);
var preSelectionRange = range.cloneRange();
preSelectionRange.selectNodeContents(containerEl);
preSelectionRange.setEnd(range.startContainer, range.startOffset);
var start = preSelectionRange.toString().length;
return {
start: start,
end: start + range.toString().length
};
}
};
restoreSelection = function(containerEl, savedSel) {
containerEl.focus();
var charIndex = 0, range = document.createRange();
range.setStart(containerEl, 0);
range.collapse(true);
var nodeStack = [containerEl], node, foundStart = false, stop = false;
while (!stop && (node = nodeStack.pop())) {
if (node.nodeType == 3) {
var nextCharIndex = charIndex + node.length;
if (!foundStart && savedSel.start >= charIndex && savedSel.start <= nextCharIndex) {
range.setStart(node, savedSel.start - charIndex);
foundStart = true;
}
if (foundStart && savedSel.end >= charIndex && savedSel.end <= nextCharIndex) {
range.setEnd(node, savedSel.end - charIndex);
stop = true;
}
charIndex = nextCharIndex;
} else {
var i = node.childNodes.length;
while (i--) {
nodeStack.push(node.childNodes[i]);
}
}
}
var sel = window.getSelection();
sel.removeAllRanges();
sel.addRange(range);
}
function pasteHtmlAtCaret(html, returnInNode, selectPastedContent) {
//function written by Tim Down
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
// only relatively recently standardized and is not supported in
// some 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);
}
var firstNode = frag.firstChild;
range.insertNode(frag);
// Preserve the selection
if (lastNode) {
range = range.cloneRange();
if (returnInNode)
{
range.setStart(lastNode, 0); //this part is edited, set caret inside pasted node.
}
else
{
range.setStartAfter(lastNode);
}
if (selectPastedContent) {
range.setStartBefore(firstNode);
} else {
range.collapse(true);
}
sel.removeAllRanges();
sel.addRange(range);
}
}
} else if ( (sel = document.selection) && sel.type != "Control") {
// IE < 9
var originalRange = sel.createRange();
originalRange.collapse(true);
sel.createRange().pasteHTML(html);
if (selectPastedContent) {
range = sel.createRange();
range.setEndPoint("StartToStart", originalRange);
range.select();
}
}
}
$('[contenteditable]').on('paste', function (e) {
setTimeout(function () {
$(e.target).children('span').each(function () {
$(this).replaceWith($(this).text());
});
}, 0);
});
var $plainText = $("#plainText");
var $linkOnly = $("#linkOnly");
var $html = $("#html");
$plainText.on('paste', function (e) {
window.setTimeout(function () {
$plainText.html(removeAllTags(replaceStyleAttr($plainText.html())));
}, 0);
});
$linkOnly.on('paste', function (e) {
window.setTimeout(function () {
$linkOnly.html(removeTagsExcludeA(replaceStyleAttr($linkOnly.html())));
}, 0);
});
function replaceStyleAttr (str) {
return str.replace(/(<[\w\W]*?)(style)([\w\W]*?>)/g, function (a, b, c, d) {
return b + 'style_replace' + d;
});
}
function removeTagsExcludeA (str) {
return str.replace(/<\/?((?!a)(\w+))\s*[\w\W]*?>/g, '');
}
function removeAllTags (str) {
return str.replace(/<\/?(\w+)\s*[\w\W]*?>/g, '');
}
function myFunct( e ){
e.preventDefault();
var pastedText = undefined;
if( window.clipboardData && window.clipboardData.getData ){
pastedText = window.clipboardData.getData('Text');
}
else if( e.clipboardData && e.clipboardData.getData ){
pastedText = e.clipboardData.getData('text/plain');
}
//work with text
}
document.onpaste = myFunct;
if (/text\/plain/.test(e.clipboardData.types)) {
// shouldn't this be writing to elem.value for text/plain anyway?
elem.innerHTML = e.clipboardData.getData('text/plain');
}
types = e.clipboardData.types;
if (((types instanceof DOMStringList) && types.contains("text/plain")) ||
(/text\/plain/.test(types))) {
// shouldn't this be writing to elem.value for text/plain anyway?
elem.innerHTML = e.clipboardData.getData('text/plain');
}
selRange.deleteContents();
$('[contenteditable]').on('paste', function (e) {
e.preventDefault();
if (window.clipboardData) {
content = window.clipboardData.getData('Text');
if (window.getSelection) {
var selObj = window.getSelection();
var selRange = selObj.getRangeAt(0);
selRange.deleteContents();
selRange.insertNode(document.createTextNode(content));
}
} else if (e.originalEvent.clipboardData) {
content = (e.originalEvent || e).clipboardData.getData('text/plain');
document.execCommand('insertText', false, content);
}
});
document.onpaste = function(e) {
var pasted = e.clipboardData.getData('Text');
console.log(pasted)
}