utils文件夹-htmlToPdf.js
/* eslint-disable */
// 导出页面为PDF格式
import html2Canvas from 'html2canvas';
import JsPDF from 'jspdf';
export default {
install(Vue, options) {
Vue.prototype.getPdf = function(title) {
var title = this.htmlTitle;
var element = document.querySelector('#pdfDom'); // 这个dom元素是要导出pdf的div容器
setTimeout(() => {
html2Canvas(element).then(function(canvas) {
var contentWidth = canvas.width;
var contentHeight = canvas.height;
//一页pdf显示html页面生成的canvas高度;
var pageHeight = (contentWidth / 592.28) * 841.89;
//未生成pdf的html页面高度
var leftHeight = contentHeight;
//页面偏移
var position = 0;
//a4纸的尺寸[595.28,841.89],html页面生成的canvas在pdf中图片的宽高
var imgWidth = 595.28;
var imgHeight = (592.28 / contentWidth) * contentHeight;
var pageData = canvas.toDataURL('image/jpeg', 1.0);
var pdf = new JsPDF('', 'pt', 'a4');
//有两个高度需要区分,一个是html页面的实际高度,和生成pdf的页面高度(841.89)
//当内容未超过pdf一页显示的范围,无需分页
if (leftHeight < pageHeight) {
pdf.addImage(pageData, 'JPEG', 0, 0, imgWidth, imgHeight);
} else {
while (leftHeight > 0) {
pdf.addImage(pageData, 'JPEG', 0, position, imgWidth, imgHeight);
leftHeight -= pageHeight;
position -= 841.89;
//避免添加空白页
if (leftHeight > 0) {
pdf.addPage();
}
}
}
pdf.save(title + '.pdf');
});
}, 0);
};
}
};
main.js 引入注册全局方法
import htmlToPdf from './util/htmlToPdf.js';
Vue.use(htmlToPdf);
组件中调用
<templete>
<div id="main">
<div class="mainbox">
<button @click='getpdfyes'></button>
<!-- 组件 -->
<div id="pdfDom" class="movebox" ref="htmlall">
<nsfocus-cont></nsfocus-cont>
</div>
</div>
</div>
</templete>
//
<script>
export default {
data() {
return {
htmlTitle: sessionStorage.getItem('FileName')
}
},
methods:{
getpdfyes() {
this.getPdf()
},
}
},
</script>