vue中使用print.js导出pdf操作

1.print.js

// 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 += \"\";

str += \"\"; return str; },

getHtml: function () {

var inputs = document.querySelectorAll('input');

var textareas = document.querySelectorAll('textarea'); var selects = document.querySelectorAll('select'); var canvass = document.querySelectorAll('canvas');

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')

} } } } }

//canvass echars图表转为图⽚

for (var k4 = 0; k4 < canvass.length; k4++) {

var imageURL = canvass[k4].toDataURL(\"image/png\"); var img = document.createElement(\"img\"); img.src = imageURL;

img.setAttribute('style', 'max-width: 100%;'); img.className = 'isNeedRemove' // canvass[k4].style.display = 'none'

// canvass[k4].parentNode.style.width = '100%' // canvass[k4].parentNode.style.textAlign = 'center'

canvass[k4].parentNode.insertBefore(img,canvass[k4].nextElementSibling); }

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;\";

iframe.setAttribute('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();

// 避免重复打印echarts

var removes = document.querySelectorAll('.isNeedRemove'); for (var k = 0; k < removes.length; k++) {

removes[k].parentNode.removeChild(removes[k]); }

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) {

console.log('err', 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

⾃⼰页⾯的样式添加

str += \"\";解决echarts图表多点击⼀次 就会多⼀张bug

img.className = 'isNeedRemove'

canvass[k4].parentNode.insertBefore(img,canvass[k4].nextElementSibling);var removes = document.querySelectorAll('.isNeedRemove');

2.⽤法

//调⽤系统打印机print () {

this.$print(this.$refs.print) // 使⽤},

题外话

1.在⾃⼰需要的页⾯引⽤打印页⾯ 这边我打印页⾯时preview.vue页⾯

import Preview from '../operation_report/Preview'export default { components: { Preview }}

获取别的页⾯的表单内容 初始化

export default { data() { return{

previewEditForm: {}, } }}

// ⽗组件向⼦组件传值 on: {

click: () => {

// ⽗组件向⼦组件传值

this.previewEditForm = params.row; setTimeout(() => {

this.$refs.print.queryById();

this.$refs.print.eventOverviews(); this.previewModal=true; }, 2000) } }

隐藏打印页⾯不需要的按钮

4.打印内容有echarts时 内容不⾃适应 调整width

width: 210mm;最终如下

补充知识：使⽤vue-cli脚⼿架 与 axios 请求数据 配置代理进⾏跨域访问数据问题

⾸先利⽤脚⼿架vue-cli 把项⽬搭建好 然后在 利⽤控制台 在项⽬中安装http-proxy-middleware中间件作为代理控制台安装中间代理命令 如下：

npm install -S http-proxy-middleware然后按照下图 ⼀步步配置配置结束 是不是 还是不⾏？

在这⾥ 要关闭下项⽬ 重新在控制台 npm run dev 重启项⽬ 就⼤功告成了

⼀点⼼得 体会 写得不好 还请⼤家多多包涵

以上这篇vue 中使⽤print.js导出pdf操作就是⼩编分享给⼤家的全部内容了，希望能给⼤家⼀个参考，也希望⼤家多多⽀持。