1.首先按目前研究 print可以打印dom
2.被设置overflow：hidden 的模块，打印时会被截掉。
3.被设置成 display：none 的dom 打印不会有样式 边框等。
4.如果需要改变打印样式则需要css3媒体查询，并确保样式被加载到输出的dom中；
例如：
<style type="text/css">
@media print {
.showy>p{display:none;}
.cls{display:none;}
td {background-color: red; border:1px solid #333; }}
iframe{position:absolute;top:-100000px;left:-100000px;}
@page{
size: A4 landscape;
margin:1cm;
}
</style>
下面是完整的例子：
html:
<!doctype html>
<html>
<head>
<meta charset="UTF-8">
<title>Print.js 演示</title>
<meta name="author" content="DH">
<link rel="stylesheet" href="files/comm.css" />
<style>
.wrap {
margin: 0 auto;
padding: 20px;
width: 640px;
border: 1px solid #ccc;
} .form .row {
padding: 10px 0 0;
} .btn {
display: block;
margin: 20px auto;
padding: 8px 16px;
}
html,body{margin:0;padding:0}
body{font-size:14px;color:#333} @page{
size: A4 landscape;
margin:1cm;
}
@media print{
body{-webkit-print-color-adjust:exact}
.showy{overflow-x:visible}
} .fr{float:right}
.vt{vertical-align:top}
</style>
</head>
<body>
<div id="wrap" class="wrap">
<div class="con">
<h1>萨摩耶犬</h1>
<p>萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬</p>
<h1>萨摩耶犬</h1>
<p>萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬</p>
<h1>萨摩耶犬</h1>
<p>萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬</p>
<h1>萨摩耶犬</h1>
<p>萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬萨摩耶犬</p> </div>
<button class="btn no-print" id="btn">打印</button>
</div>
<script src="files/Print.js"></script>
<script>
document.getElementById('btn').onclick = function () { Print('#wrap', {
onStart: function () {
console.log('onStart', new Date())
},
onEnd: function () {
console.log('onEnd', new Date())
}
}) }
</script>
</body>
</html>
js:
/* @Print.js
*/
(function (window, document) {
var Print = function (dom, options) {
if (!(this instanceof Print)) return new Print(dom, options); this.options = this.extend({
noPrint: '.no-print',
onStart: function () { },
onEnd: function () { }
}, options); if ((typeof dom) === "string") {
this.dom = document.querySelector(dom);
} else {
this.dom = dom;
} this.init();
};
Print.prototype = {
init: function () {
var content = this.getStyle() + this.getHtml();
this.writeIframe(content);
},
extend: function (obj, obj2) {
for (var k in obj2) {
obj[k] = obj2[k];
}
return obj;
}, getStyle: function () {
var str = "",
styles = document.querySelectorAll('style,link');
for (var i = 0; i < styles.length; i++) {
str += styles[i].outerHTML;
}
str += "<style>" + (this.options.noPrint ? this.options.noPrint : '.no-print') + "{display:none;}</style>"; return str;
}, getHtml: function () {
var inputs = document.querySelectorAll('input');
var textareas = document.querySelectorAll('textarea');
var selects = document.querySelectorAll('select'); for (var k in inputs) {
if (inputs[k].type == "checkbox" || inputs[k].type == "radio") {
if (inputs[k].checked == true) {
inputs[k].setAttribute('checked', "checked")
} else {
inputs[k].removeAttribute('checked')
}
} else if (inputs[k].type == "text") {
inputs[k].setAttribute('value', inputs[k].value)
}
} for (var k2 in textareas) {
if (textareas[k2].type == 'textarea') {
textareas[k2].innerHTML = textareas[k2].value
}
} for (var k3 in selects) {
if (selects[k3].type == 'select-one') {
var child = selects[k3].children;
for (var i in child) {
if (child[i].tagName == 'OPTION') {
if (child[i].selected == true) {
child[i].setAttribute('selected', "selected")
} else {
child[i].removeAttribute('selected')
}
}
}
}
} return this.dom.outerHTML;
}, writeIframe: function (content) {
var w, doc, iframe = document.createElement('iframe'),
f = document.body.appendChild(iframe);
iframe.id = "myIframe";
iframe.style = "position:absolute;width:0;height:0;top:-10px;left:-10px;"; w = f.contentWindow || f.contentDocument;
doc = f.contentDocument || f.contentWindow.document;
doc.open();
doc.write(content);
doc.close();
this.toPrint(w, function () {
document.body.removeChild(iframe)
});
}, toPrint: function (w, cb) {
var _this = this;
w.onload = function () {
try {
setTimeout(function () {
w.focus();
typeof _this.options.onStart === 'function' && _this.options.onStart();
if (!w.document.execCommand('print', false, null)) {
w.print();
}
typeof _this.options.onEnd === 'function' && _this.options.onEnd();
w.close();
cb && cb()
});
} catch (err) {
console.log('err', err);
}
}
}
};
window.Print = Print;
}(window, document));
扩展阅读
https://cloud.tencent.com/developer/section/1072311
http://www.jq22.com/jquery-info15776
http://www.cokea.com