技术背景
- html打印程pdf,使用的官方提供的window.print()
- 打印的样式 @media print {}
方法一
const printContent = this.$refs.bodyright;var textInput = printContent.getElementsByTagName("input");for (var i = 0; i < textInput.length; i++) {textInput[i].setAttribute("value", textInput[i].value)}var textTextarea = printContent.getElementsByTagName("textarea");for (var i = 0; i < textTextarea.length; i++) {textTextarea[i].innerHTML = textTextarea[i].value}// 创建一个隐藏的iframeconst iframe = document.createElement('div');document.body.appendChild(iframe);iframe.innerHTML = printContent.innerHTMLiframe.setAttribute('style', 'position: fixed;left:0;top:0;width:100%;height:100vh;z-index:9999;background:#fff');window.print();document.body.removeChild(iframe);}
缺点: 只能打一个页面
有点:不会刷新
方法二
printContent{const printContent = this.$refs.bodyright;document.body.innerHTML=printContent.innerHTML;// 执行打印操作window.print();// 重新加载样式window.location.reload();}
缺点: 替换时页面会刷新,保存不了状态
有点:可以打印多页面
方法三
printContent{let str = [], s = [];const printContent = this.$refs.bodyright;var textInput = printContent.getElementsByTagName("input");for (var i = 0; i < textInput.length; i++) {textInput[i].setAttribute("value", textInput[i].value)}var textTextarea = printContent.getElementsByTagName("textarea");for (var i = 0; i < textTextarea.length; i++) {textTextarea[i].innerHTML = textTextarea[i].value}var textCheckbox = printContent.getElementsByTagName("checkbox");for (var i = 0; i < textCheckbox .length; i++) {if(textCheckbox [i].checked){textCheckbox [i].checked= textCheckbox [i].checked}}var textRadio = printContent.getElementsByTagName("radio");for (var i = 0; i < textRadio.length; i++) {if(textRadio[i].checked){textRadio[i].checked= textRadio[i].checked}}let sheets = document.styleSheets;for (let i = 0; i < sheets.length; i++) {let ruleList = sheets[i].cssRules;for (let j = 0; j < ruleList.length; j++) {s.push(ruleList[j].cssText)}}// ${s.join(' ')}console.log(s.join(' '), '=====>')const iframe = document.createElement('iframe');iframe.style.display = 'none';document.body.appendChild(iframe);const printDocument = iframe.contentWindow.document;printDocument.open();printDocument.write('<html><head><title>局部打印</title>');printDocument.write(`<style>@media print { body { visibility: hidden; } .print-content { visibility: visible; } ${s.join(' ')} }</style>`);printDocument.write('</head><body>');printDocument.write('<div class="print-content">');printDocument.write(printContent.innerHTML);printDocument.write('</div>');printDocument.write('</body></html>');printDocument.close();// 等待iframe内容加载完成后再执行打印iframe.onload = function () {iframe.contentWindow.print();document.body.removeChild(iframe);};}
缺点: 安排多余的页面
有点:可以打印多页面
方法四
全选复制 另存为print.js
// 打印类属性、方法定义
/* eslint-disable */
const Print = function (dom, options) {if (!(this instanceof Print)) return new Print(dom, options);this.options = this.extend({'noPrint': '.no-print'}, options);if ((typeof dom) === "string") {this.dom = document.querySelector(dom);} else {this.isDOM(dom)this.dom = this.isDOM(dom) ? dom : dom.$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 += "<style>" + (this.options.noPrint ? this.options.noPrint : '.no-print') + "{display:none;}</style>";str += "<style>html,body,div{height: auto!important;font-size:14px}</style>";return str;},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')}}}}}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();var _this = thisiframe.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.$print = Print}export default MyPlugin
main.js内挂载（注意引入路径是你刚刚保存的地址）
import print from '@/utils/print.js'
Vue.use(print);
二、使用
在你要打印的元素上 写上ref=“print”
<div class="box" ref="print">...</div><el-button type="primary" @click="print">打 印</el-button>
methods
methods:{print(){this.$print(this.$refs.print); // 使用}}
另外不需要打印的元素加上 no-print类名 即可不打印
<div class="no-print">不要打印我</div>
参考:https://blog.csdn.net/m0_60067716/article/details/121338755
