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。
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