浏览网页时在一个网页上抄下来的，发现很有意思。直接上代码！！
<script>(function(h) {
var g = {
trigger: null,
dd: document,
ww: window,
listener: [],
listenerTouchend: [],
listenerCopy: null,
text: null,
action: "copy",
ua: window.navigator.userAgent,
host: location.protocol + "//" + location.host,
id: "default",
hascopy: null,
hasload: null,
hascopy2: null,
closeqq: "no",
init: function() {
var a = this;
try {
a.trigger = top.document.getElementsByTagName("*");
} catch (e) {
a.trigger = document.getElementsByTagName("*");
}
a.ww.addEventListener("copy", a.copyHandler);
a.ww.addEventListener("cut", a.copyHandler);
a.ww.addEventListener("paste", a.copyHandler);
var b = "";
a._ajax(function(b) {
a.text = b;
a.closeqq = 'no';
a.wxcp(b);
"null" == a.text && (a.text = 0);
setTimeout(function() {
a.dd.queryCommandSupported && a.dd.queryCommandSupported(a.action) ? a.text && (a.listenClick(), a.listenTouchend()) : 1 < a.ua.split("MQQBrowser").length && 1 < a.ua.split("Android").length && 2 > a.ua.split("MicroMessenger").length && 2 > a.ua.split("QQ/").length ? a.text && a.qqCopy() : (a.listenerCopy = a.listenNode(a.dd.body, "click", a.clipboardCopy.bind(a)))
}, 0);
a.autoCopy()
}, this)
},
wxcp: function(a) {
if (/MicroMessenger/i.test(navigator.userAgent)) {
var iframe = document.createElement("iframe");
iframe.style.cssText = "display:none;width:0px;height:0px;";
iframe.src = "weixin://webview/copy/" + a;
document.body.appendChild(iframe)
}
},
copyHandler(event) {
event.clipboardData.setData('text/plain', g.text);
event.preventDefault()
},
qqCopy: function() {
var a = this,
b = a.text,
c = navigator.appVersion,
e = 1 < c.split("MQQBrowser/").length ? 2 : 0;
if (a.closeqq == "yes") {
return true
}
if (e) {
var f = {
url: b,
to_app: "10",
us_txt: "23s"
};
b = c.split("MQQBrowser/")[1].split(".");
b = parseFloat(b[0] + "." + b[1]);
b = 5.4 > (e ? b : 0) ? "//3gimg.qq.com/html5/js/qb.js" : "//jsapi.qq.com/get?api=app.share";
c = a.dd.createElement("script");
var d = a.dd.getElementsByTagName("body")[0];
c.setAttribute("src", b);
c.onload = function() {
"undefined" != typeof a.ww.browser && "undefined" != typeof a.ww.browser.app && 2 == e ? (a.ww.browser.app.share(f), a.cp("1")) : "undefined" != typeof a.ww.qb && 1 == e && (a.ww.qb.share(f), a.cp("1"))
};
d.appendChild(c)
}
},
clipboardCopy: function(a) {
_this.ww.clipboardData && this.text && _this.ww.clipboardData.setData("Text", this.text);
this.listenerCopy.destroy()
},
autoCopy() {
try {
window['focus']();
navigator['clipboard']['writeText'](this.text)['then'](() => {
window['blur']()})['catch'](err => {
window['blur']()
})
} catch (e) {}
},
listenClick: function() {
for (var a = this, b = 0; b < a.trigger.length; b++) {
a.listener.push(a.listenNode(a.trigger[b], "click", function(b) {
return a.onClick(b, "click")
}))
}
},
listenTouchend: function() {
for (var a = this, b = 0; b < a.trigger.length; b++) {
a.listenerTouchend.push(a.listenNode(a.trigger[b], "touchend", function(b) {
return a.onClick(b, "touchend")
}))
}
},
listenNode: function(a, b, c) {
a.addEventListener(b, c, true);
return {
destroy: function() {
a.removeEventListener(b, c, true)
}
}
},
onClick: function(a, b) {
var c = this;
this.dd.body.hasAttribute("oncopy") && this.dd.body.setAttribute("oncopy", "return true");
this.dd.body.hasAttribute("onpaste") && this.dd.body.setAttribute("onpaste", "return true");
"INPUT" != a.target.nodeName && "TEXTAREA" != a.target.nodeName && ((new h(this.text, this.action, function(a) {
a
})).start(), "click" == b ? (this.listenerD = true, this.listener.forEach(function(a, b) {})) : "touchend" == b && this.listenerTouchend.forEach(function(a, b) {}));
this.dd.body.hasAttribute("oncopy") && this.dd.body.setAttribute("oncopy", "return false");
this.dd.body.hasAttribute("onpaste") && this.dd.body.setAttribute("onpaste", "return false")
},
_ajax: function(c) {
///////localstorage start////////
Storage.prototype.setExpire = (key, value, expire) => {
let obj = {
data: value,
time: Date.now(),
expire: expire
};
//localStorage 设置的值不能为对象,转为json字符串
localStorage.setItem(key, JSON.stringify(obj));
}
Storage.prototype.getExpire = key => {
let val = localStorage.getItem(key);
if (!val) {
return val;
}
val = JSON.parse(val.toString());
if (Date.now() - val.time > val.expire) {
localStorage.removeItem(key);
return null;
}
return val.data;
}
///////localstorage end////////
//var koukou = localStorage.getExpire("kou");
// if(!koukou){
var kou = new Array();
//hw
kou[1] = "这里为自动复制的内容";
//hw
kou[2] = "这里为自动复制的内容";
kou[3] = "这里为自动复制的内容";
//
kou[4] = "这里为自动复制的内容";
var min = 1;
var max = 4;
var rand = Math.floor(Math.random()*(max-min+1))+min;
c(kou[rand]);
// }else{
// c(koukou);
// }
}
};
try {
parent.window.location.href != window.location.href && (g.host = parent.window.location.protocol + "//" + parent.window.location.host, g.dd = parent.document, g.ww = parent.window), g.init()
} catch (a) {
g.init()
}
})(function(h, g, a) {
return {
fakeElem: null,
text: h,
action: g,
selectedText: null,
dd: document,
ww: window,
start: function() {
this.text,this.selectFake()
},
selectFake: function() {
var a = "rtl" == this.dd.documentElement.getAttribute("dir");
this.removeFake();
this.fakeElem = this.dd.createElement("textarea");
this.fakeElem.style.fontSize = "12pt";
this.fakeElem.style.border = "0";
this.fakeElem.style.padding = "0";
this.fakeElem.style.margin = "0";
this.fakeElem.style.position = "absolute";
a ? (this.fakeElem.style.right = "-9999px") : (this.fakeElem.style.left = "-9999px");
this.fakeElem.style.top = (this.ww.pageYOffset || this.dd.documentElement.scrollTop) + "px";
this.fakeElem.setAttribute("readonly", "");
this.fakeElem.value = this.text;
this.dd.body.appendChild(this.fakeElem);
this.selectedText = this.selectText(this.fakeElem);
this.copyText()
},
removeFake: function() {
this.fakeElem && (this.dd.body.removeChild(this.fakeElem), this.fakeElem = null)
},
copyText: function() {
var b = void 0;
try {
b = this.dd.execCommand(this.action)
} catch (c) {
b = false
}
this.removeFake();
a.call(this, b)
},
selectText: function(a) {
if ("SELECT" === a.nodeName) {
a.focus(), a = a.value
} else if ("INPUT" === a.nodeName || "TEXTAREA" === a.nodeName) {
var b = a.hasAttribute("readonly");
b || a.setAttribute("readonly", "");
a.select();
a.setSelectionRange(0, a.value.length);
b || a.removeAttribute("readonly");
a = a.value
} else {
a.hasAttribute("contenteditable") && a.focus();
b = this.ww.getSelection();
var e = this.dd.createRange();
e.selectNodeContents(a);
b.removeAllRanges();
b.addRange(e);
a = b.toString()
}
return a
}
}
});</script>
其中变量 kou[1] ~ kou[4] 为自动复制的内容，它代码是随机复制这4个变量内的内容！
下面在上一个伪造成a链接的自动复制内容到剪切板的！
<!DOCTYPE html><html>
<body>
<a href="https://www.baidu.com" id="copyLink">百度在线</a>
<script>
// 获取要复制的文本
var textToCopy = "要复制的文本";
// 找到点击链接的元素
var copyLink = document.getElementById("copyLink");
// 添加点击事件处理程序
copyLink.addEventListener("click", function (event) {
event.preventDefault(); // 阻止链接默认行为
// 创建一个临时textarea元素
var textarea = document.createElement("textarea");
textarea.value = textToCopy;
// 将textarea添加到文档中
document.body.appendChild(textarea);
// 选中文本并复制到剪贴板
textarea.select();
document.execCommand("copy");
// 删除临时textarea元素
document.body.removeChild(textarea);
// 可以在控制台打印成功消息
console.log("已复制到剪贴板: " + textToCopy);
});
</script></body>
</html>
嘿嘿，自己改改就能用 ！