编辑： 我收到此错误，知道吗？
aura_prod.js:24 Uncaught (in promise) TypeError: Failed to execute 'selectNodeContents' on 'Range': parameter 1 is not of type 'Node'.
at Proxy.Tt.l (aura_prod.js:24)
at T (clipboard:1)
at _ (clipboard:1)
at Object.eval (clipboard:1)
at eval (clipboard:1)
at Object.eval [as next] (clipboard:1)
at eval (clipboard:1)
at new Promise (<anonymous>)
at e (clipboard:1)
at Object.p [as write] (clipboard:1)
编辑结束
复制时是否有办法取出html标签？
我有一个输出，旁边有一个复制按钮，当用户单击copy时，我想保留粘贴时的格式。
我该怎么办？
我已经看过许多不同的方法，但是没有一个起作用，这是我尝试过的方法。
这是它在我的页面上的输出方式：
public class TestAccountTrigger {
@testSetup
static void initData(){
Account a0 = new Account(Name = 'Account Zero');
insert a0;
}
这是我在Google chrome中对其进行检查时的外观：
<p>public class TestAccountTrigger { </p><p></p>
<p>@testSetup</p><p>static void initData(){</p><p>Account a0 = new
Account(Name = 'Account Zero');</p><p>insert a0; </p><p> }</p>
我的JS代码：
var doc = new DOMParser().parseFromString(returnText, 'text/html');
// Create an hidden input
var hiddenInput = document.createElement("input");
// passed text into the input
hiddenInput.setAttribute("value", doc.body.textContent);
// Append the hiddenInput input to the body
document.body.appendChild(hiddenInput);
// select the content
hiddenInput.select();
// Execute the copy command
document.execCommand("copy");
// Remove the input from the body after copy text
document.body.removeChild(hiddenInput);
// store target button label value
var orignalLabel = event.getSource().get("v.label");
// change button icon after copy text
event.getSource().set("v.iconName" , 'utility:check');
// change button label with 'copied' after copy text
event.getSource().set("v.label" , 'Copied');
复制并粘贴后，它是这样的：
公共类TestAccountTrigger {@testSetup静态无效initData（）{ 帐户a0 =新帐户（名称=“帐户零”）；插入a0;
我的问题：复制后，如何保存格式？
答案 0 :(得分：1)
来自https://github.com/lgarron/clipboard-polyfill：
下载此版本：
此版本较小，但是除非您添加自己的Promise polyfill（请参阅下文），否则在 Internet Explorer 中将无法使用。
https://github.com/lgarron/clipboard-polyfill/releases/latest/download/clipboard-polyfill.js
或
此版本在所有支持复制到剪贴板的浏览器中均可使用，但更大。
https://github.com/lgarron/clipboard-polyfill/releases/latest/download/clipboard-polyfill.promise.js
一旦确定了上述两个文件之一，就可以链接到该文件，也可以直接将代码复制并粘贴到自己的页面中。它已经缩小了。
样品用量：
var dt = new clipboard.DT();
dt.setData("text/plain", "Fallback markup text.");
dt.setData("text/html", "<i>Markup</i> <b>text</b>.");
clipboard.write(dt);
我认为以下内容仍然有效...您只能在人为操作（例如单击按钮或键盘事件）期间执行复制。这是一种安全措施。
使用polyfill的好处在于，当修改浏览器以遵循公认的准则时，您的代码仍然可以运行，并且您可以放弃对此代码的依赖。
示例：
$("#copy").on("click", function(e)
{
var dt = new clipboard.DT();
dt.setData("text/plain", $("#table")[0].outerText);
dt.setData("text/html", $("#table")[0].outerHTML);
clipboard.write(dt);
});
$("#copy2").on("click", function(e)
{
var dt = new clipboard.DT();
dt.setData("text/plain", $("#content")[0].innerText);
dt.setData("text/html", $("#content")[0].innerHTML);
clipboard.write(dt);
});
// ---------------------------------------------------
!function(t,e){"object"==typeof exports&&"undefined"!=typeof module?e(exports):"function"==typeof define&&define.amd?define(["exports"],e):e((t=t||self).clipboard={})}(this,function(t){"use strict";function e(t,e,n,r){return new(n||(n=Promise))(function(o,i){function a(t){try{c(r.next(t))}catch(t){i(t)}}function u(t){try{c(r.throw(t))}catch(t){i(t)}}function c(t){t.done?o(t.value):new n(function(e){e(t.value)}).then(a,u)}c((r=r.apply(t,e||[])).next())})}function n(t,e){var n,r,o,i,a={label:0,sent:function(){if(1&o[0])throw o[1];return o[1]},trys:[],ops:[]};return i={next:u(0),throw:u(1),return:u(2)},"function"==typeof Symbol&&(i[Symbol.iterator]=function(){return this}),i;function u(i){return function(u){return function(i){if(n)throw new TypeError("Generator is already executing.");for(;a;)try{if(n=1,r&&(o=2&i[0]?r.return:i[0]?r.throw||((o=r.return)&&o.call(r),0):r.next)&&!(o=o.call(r,i[1])).done)return o;switch(r=0,o&&(i=[2&i[0],o.value]),i[0]){case 0:case 1:o=i;break;case 4:return a.label++,{value:i[1],done:!1};case 5:a.label++,r=i[1],i=[0];continue;case 7:i=a.ops.pop(),a.trys.pop();continue;default:if(!(o=(o=a.trys).length>0&&o[o.length-1])&&(6===i[0]||2===i[0])){a=0;continue}if(3===i[0]&&(!o||i[1]>o[0]&&i[1]<o[3])){a.label=i[1];break}if(6===i[0]&&a.label<o[1]){a.label=o[1],o=i;break}if(o&&a.label<o[2]){a.label=o[2],a.ops.push(i);break}o[2]&&a.ops.pop(),a.trys.pop();continue}i=e.call(t,a)}catch(t){i=[6,t],r=0}finally{n=o=0}if(5&i[0])throw i[1];return{value:i[0]?i[1]:void 0,done:!0}}([i,u])}}}var r=["text/plain","text/html"];var o=function(){(console.warn||console.log).call(arguments)}.bind(console,"[clipboard-polyfill]"),i=!0;var a=function(){function t(){this.m={}}return t.prototype.setData=function(t,e){i&&-1===r.indexOf(t)&&o("Unknown data type: "+t,"Call clipboard.suppressWarnings() to suppress this warning."),this.m[t]=e},t.prototype.getData=function(t){return this.m[t]},t.prototype.forEach=function(t){for(var e in this.m)t(this.m[e],e)},t}(),u=function(t){},c=!0;var s=function(){(console.warn||console.log).apply(console,arguments)}.bind("[clipboard-polyfill]"),d="text/plain";function l(t){u=t}function f(){c=!1,i=!1}function p(t){return e(this,void 0,void 0,function(){var e;return n(this,function(n){if(c&&!t.getData(d)&&s("clipboard.write() was called without a `text/plain` data type. On some platforms, this may result in an empty clipboard. Call clipboard.suppressWarnings() to suppress this warning."),k()){if(function(t){var e=t.getData(d);if(void 0!==e)return window.clipboardData.setData("Text",e);throw new Error("No `text/plain` value was specified.")}(t))return[2];throw new Error("Copying failed, possibly because the user rejected it.")}if(x(t))return u("regular execCopy worked"),[2];if(navigator.userAgent.indexOf("Edge")>-1)return u('UA "Edge" => assuming success'),[2];if(D(document.body,t))return u("copyUsingTempSelection worked"),[2];if(function(t){var e=document.createElement("div");e.setAttribute("style","-webkit-user-select: text !important"),e.textContent="temporary element",document.body.appendChild(e);var n=D(e,t);return document.body.removeChild(e),n}(t))return u("copyUsingTempElem worked"),[2];if(void 0!==(e=t.getData(d))&&function(t){u("copyTextUsingDOM");var e=document.createElement("div");e.setAttribute("style","-webkit-user-select: text !important");var n=e;e.attachShadow&&(u("Using shadow DOM."),n=e.attachShadow({mode:"open"}));var r=document.createElement("span");r.innerText=t,n.appendChild(r),document.body.appendChild(e),T(r);var o=document.execCommand("copy");return E(),document.body.removeChild(e),o}(e))return u("copyTextUsingDOM worked"),[2];throw new Error("Copy command failed.")})})}function v(t){return e(this,void 0,void 0,function(){return n(this,function(e){return navigator.clipboard&&navigator.clipboard.writeText?(u("Using `navigator.clipboard.writeText()`."),[2,navigator.clipboard.writeText(t)]):[2,p(C(t))]})})}function h(){return e(this,void 0,void 0,function(){var t;return n(this,function(e){switch(e.label){case 0:return t=C,[4,b()];case 1:return[2,t.apply(void 0,[e.sent()])]}})})}function b(){return e(this,void 0,void 0,function(){return n(this,function(t){if(navigator.clipboard&&navigator.clipboard.readText)return u("Using `navigator.clipboard.readText()`."),[2,navigator.clipboard.readText()];if(k())return u("Reading text using IE strategy."),[2,U()];throw new Error("Read is not supported in your browser.")})})}var m=!1;function w(){m||(c&&s('The deprecated default object of `clipboard-polyfill` was called. Please switch to `import * as clipboard from "clipboard-polyfill"` and see https://github.com/lgarron/clipboard-polyfill/issues/101 for more info.'),m=!0)}var y={DT:a,setDebugLog:function(t){return w(),l(t)},suppressWarnings:function(){return w(),f()},write:function(t){return e(this,void 0,void 0,function(){return n(this,function(e){return w(),[2,p(t)]})})},writeText:function(t){return e(this,void 0,void 0,function(){return n(this,function(e){return w(),[2,v(t)]})})},read:function(){return e(this,void 0,void 0,function(){return n(this,function(t){return w(),[2,h()]})})},readText:function(){return e(this,void 0,void 0,function(){return n(this,function(t){return w(),[2,b()]})})}},g=function(){this.success=!1};function x(t){var e=new g,n=function(t,e,n){u("listener called"),t.success=!0,e.forEach(function(e,r){var o=n.clipboardData;o.setData(r,e),r===d&&o.getData(r)!==e&&(u("setting text/plain failed"),t.success=!1)}),n.preventDefault()}.bind(this,e,t);document.addEventListener("copy",n);try{document.execCommand("copy")}finally{document.removeEventListener("copy",n)}return e.success}function D(t,e){T(t);var n=x(e);return E(),n}function T(t){var e=document.getSelection();if(e){var n=document.createRange();n.selectNodeContents(t),e.removeAllRanges(),e.addRange(n)}}function E(){var t=document.getSelection();t&&t.removeAllRanges()}function C(t){var e=new a;return e.setData(d,t),e}function k(){return"undefined"==typeof ClipboardEvent&&void 0!==window.clipboardData&&void 0!==window.clipboardData.setData}function U(){return e(this,void 0,void 0,function(){var t;return n(this,function(e){if(""===(t=window.clipboardData.getData("Text")))throw new Error("Empty clipboard or could not read plain text from clipboard");return[2,t]})})}t.DT=a,t.default=y,t.read=h,t.readText=b,t.setDebugLog=l,t.suppressWarnings=f,t.write=p,t.writeText=v,Object.defineProperty(t,"__esModule",{value:!0})});
//# sourceMappingURL=clipboard-polyfill.js.map<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<button id="copy">Copy</button> <br />
<button id="copy2">Copy 2</button> <br />
<table id="table" style="width:100%">
<tr>
<td style="font-size:20pt;">1</td>
<td style="background-color:pink;">2</td>
<td style="color:red">3</td>
</tr>
</table>
<div id="content">
<p>public class TestAccountTrigger { </p><p></p><p>@testSetup</p><p>static void initData(){</p><p>Account a0 = new Account(Name = 'Account Zero');</p><p>insert a0; </p><p> }</p>
</div>