插件下载：
npm install --save print-js
解决方案，修改print.js里面的 getHtml
// 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'); let cells = document.querySelectorAll('.cell'); 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') } } } } } // 解决table组件打印不全 const tableNode = document.querySelectorAll('.el-table__header, .el-table__body') for (let k6 = 0; k6 < tableNode.length; k6++) { const tableItem = tableNode[k6] tableItem.style.width = '100%' const child = tableItem.childNodes; for (let i = 0; i < child.length; i++) { const element = child[i]; if (element.localName === 'colgroup') { element.innerHTML = '' } } } // table格子超出问题 for (let k7 = 0; k7 < cells.length; k7++) { const cell = cells[k7] cell.style.width = '100%' cell.removeAttribute('style') } 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 = 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 标签：function,inputs,dom,打印,element,var,print,document From： https://www.cnblogs.com/tiantiantiantian/p/17386428.html