1.新建plugins文件夹，文件夹下面新建print，新建Print.js 源码地址（https://github.com/xyl66/vuePlugs_printjs）
// 打印类属性、方法定义
/* eslint-disable */
const Print = function (dom, options) {
if (!(this instanceof Print)) return new Print(dom, options);
this.options = this.extend({
'noPrint': '.no-print'
}, options);
if ((typeof dom) === "string") {
this.dom = document.querySelector(dom);
} else {
this.isDOM(dom)
this.dom = this.isDOM(dom) ? dom : dom.$el;
}
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>";
str += "<style>html,body,div{height: auto!important;}</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;
},
// getHtml: function () {
// var inputs = document.querySelectorAll('input');
// var textareas = document.querySelectorAll('textarea');
// var selects = document.querySelectorAll('select');
// for (var k = 0; k < inputs.length; k++) {
// 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)
// } else {
// inputs[k].setAttribute('value', inputs[k].value)
// }
// }
// for (var k2 = 0; k2 < textareas.length; k2++) {
// if (textareas[k2].type == 'textarea') {
// textareas[k2].innerHTML = textareas[k2].value
// }
// }
// for (var k3 = 0; k3 < selects.length; k3++) {
// 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')
// }
// }
// }
// }
// }
// // 包裹要打印的元素
// // fix: https://github.com/xyl66/vuePlugs_printjs/issues/36
// return this.wrapperRefDom(this.dom).outerHTML;
// },
// 向父级元素循环，包裹当前需要打印的元素
// 防止根级别开头的 css 选择器不生效
// wrapperRefDom: function (refDom) {
// let prevDom = null;
// let currDom = refDom;
// while (currDom && currDom.tagName.toLowerCase() !== 'body') {
// if (prevDom) {
// let element = currDom.cloneNode(false)
// element.appendChild(prevDom)
// prevDom = element;
// } else {
// prevDom = currDom.cloneNode(true);
// }
//
// currDom = currDom.parentElement;
// }
//
// return this.dom.outerHTML;
// return currDom.tagName.toLowerCase() === 'body' ? currDom : prevDom;
// },
writeIframe: function (content) {
var w, doc, iframe = document.createElement('iframe'),
f = document.body.appendChild(iframe);
iframe.id = "myIframe";
//iframe.style = "position:absolute;0;height:0;top:-10px;left:-10px;";
iframe.setAttribute('style', 'position:absolute;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();
var _this = this
iframe.onload = function(){
_this.toPrint(w);
setTimeout(function () {
document.body.removeChild(iframe)
}, 100)
}
},
toPrint: function (frameWindow) {
try {
setTimeout(function () {
frameWindow.focus();
try {
if (!frameWindow.document.execCommand('print', false, null)) {
frameWindow.print();
}
} catch (e) {
frameWindow.print();
}
frameWindow.close();
}, 10);
} catch (err) {
}
},
isDOM: (typeof HTMLElement === 'object') ?
function (obj) {
return obj instanceof HTMLElement;
} :
function (obj) {
return obj && typeof obj === 'object' && obj.nodeType === 1 && typeof obj.nodeName === 'string';
}
};
const MyPlugin = {}
MyPlugin.install = function (Vue, options) {
// 4. 添加实例方法
Vue.prototype.$print = Print
}
export default MyPlugin
2.main.js 注册模块
// 导入打印组件 import Print from './plugins/print/Print' Vue.use(Print)
3.新建print.vue组件
<template>
<div class="mask">
<table class="tab" cellpadding="1" cellspacing="0" border="1" ref="print">
<tr>
<th>河道名称</th>
<th>检查地址</th>
<th>巡查时间</th>
<th>检查内容</th>
<th>处理措施</th>
<th>检查情况</th>
</tr>
</table>
<div class="btn no-print">
<el-row>
<el-col :span="12">
<el-button class="no-print" type="primary" icon="el-icon-circle-check" @click="printContext">打印</el-button>
</el-col>
<el-col :span="12">
<el-button class="no-print" @click="goBack" >返回</el-button>
</el-col>
</el-row>
</div>
</div>
</template>
<script>
export default {
data () {
return {
}
},
created () {
},
methods: {
// 打印内容
printContext () {
this.$print(this.$refs.print)
},
goBack () {
this.$router.go(-1)
}
}
}
</script>
<style type='text/css'>
/*去除页眉页脚,默认横向打印*/
@page {
color: #000000 !important;
size: landscape;
margin: 1mm 2mm 1mm 1mm;
}
@media print {
#executedailyPrint {
1000px !important;
padding-top: 100px;
}
#executedailyPrint .con-box {
1000px !important;
box-shadow: none;
}
#executedailyPrint .cont-list {
1000px !important;
}
#executedailyPrint .tab {
1000px !important;
margin-top: 10px !important;
}
#executedailyPrint tr th {
font-size: 16px !important;
line-height: 40px !important;
}
#executedailyPrint tr td {
font-size: 16px !important;
line-height: 40px !important;
height: 40px !important;
}
#executedailyPrint div {
font-size: 14px !important;
}
#executedailyPrint span {
font-size: 14px !important;
}
}
</style>
5. printContext 方法
this.$print(this.$refs.print) 为实现打印方法