前端VUE导出pdf。

        jspdf这个插件对中文支持不够友好，用html的canvas转图片后还是很模糊。最终选用了pdfmake插件。

使用

1.引入pdf

npm install pdfmake  --save

2.页面import

import pdfMake from 'pdfmake/build/pdfmake';
import pdfFonts from 'pdfmake/build/vfs_fonts';
pdfMake.vfs = pdfFonts.pdfMake.vfs;

3.简单functionDemo

      exportPdf(){var fileName = 'test.pdf'const docDefinition = {content: ['测试测试','工单号：12345',],};pdfMake.createPdf(docDefinition).download(fileName)},

4.中文字库支持

官方文档https://pdfmake.github.io/docs/0.1/fonts/custom-fonts-client-side/vfs/

1. create a new vfs_fonts.js containing your font files 
Install pdfmake npm install pdfmake
Go to package directory ./node_modules/pdfmake/
Create the examples/fonts subdirectory in your pdfmake code directory, if it doesn’t already exist.
Copy your fonts (and other files you wish to embed) into the examples/fonts subdirectory.
Run command node build-vfs.js "./examples/fonts". Or run node build-vfs.js to show help.
Include your new build/vfs_fonts.js file in your code (in the same way you include pdfmake.js or pdfmake.min.js).
The above steps embeds all files from examples/fonts (into a local key/value variable pdfMake.vfs) - not only fonts. Which means you could put images in there, run node build-vfs.js "./examples/fonts, and reference them by filename in your doc-definition object.You don’t need to reference the files in examples/fonts anymore because all files have been copied to the vfs_fonts.js.

4.1 下载字库，我使用的是微软雅黑

4.2 打开项目的node_modules->pdfmake

      创建/examples/fonts 文件夹，插入字库文件

      cmd执行 node build-vfs.js "./examples/fonts"

4.3页面引入字体

import pdfMake from 'pdfmake/build/pdfmake';
import pdfFonts from 'pdfmake/build/vfs_fonts';
pdfMake.fonts = {msyh: {normal: 'msyh.ttf',bold: 'msyh.ttf',italics: 'msyh.ttf',bolditalics: 'msyh.ttf'}
};
pdfMake.vfs = pdfFonts.pdfMake.vfs;

4.4使用字体

      exportPdf(){var fileName = 'test.pdf'const docDefinition = {content: ['测试测试','工单号：12345',],defaultStyle: {font: 'msyh'},};pdfMake.createPdf(docDefinition).download(fileName)},

如果报错 roboto字体找不不到：

 1.打开pdfmake github 项目

GitHub - bpampuch/pdfmake: Client/server side PDF printing in pure JavaScript

    pdfmake/examples/fonts/ 下的roboto字体 跟你的字体都放在 4.2 中执行