深圳小程序开发_vue 中使用print.js导出pdf操作
摘要： vue 中应用print.js导出来pdf实际操作 -Feng 本文关键详细介绍了vue 中应用print.js导出来pdf实际操作，具备非常好的参照使用价值，期待对大伙儿有一定的协助。一起追随网编回来看一下...
vue 中使用print.js导出pdf操作
-Feng
这篇文章主要介绍了vue 中使用print.js导出pdf操作，具有很好的参考价值，希望对大家有所帮助。一起跟随小编过来看看吧
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,#preview-main,.report{width:100%!important;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'); 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
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,#preview-main,.report{width:100%!important;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'); 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 += " style html,body,div,#preview-main,.report{width:100%!important;height: auto!important;font-size:14px} /style
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
!-- 预览 -- Modal v-model="previewModal" fullscreen :mask-closable="false" :closable="false" preview ref="print" :previewEditOldForm="previewEditForm" /preview div slot="footer" Button type="text" @click="closePreview" 关闭 /Button Button type="primary" @click="print" 打印 /Button /div /Modal
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凡科。
