vue 中使用print.js导出pdf操作

 // 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 += "" + (this.options.noPrint ? this.options.noPrint : '.no-print') + "{display:none;}"; str += "html,body,div,#preview-main,.report{width:100%!important;height: auto!important;font-size:14px}"; 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<i>本文来源gaodai$ma#com搞$$代**码网</i> 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 

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

 //调用系统打印机 print () { this.$print(this.$refs.print) // 使用 },

 <!-- 预览 --> <div class="btn"> <button type="text">关闭</button><button type="primary">打印</button></div>

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

 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) } }

  @media print { .btn{ display: none; } }