vue中使用file-saver导出文件的全过程记录

# Basic Node.JS installation
npm install file-saver --save
bower install file-saver

# Additional typescript definitions
npm install @types/file-saver --save-dev

import { saveAs } from 'file-saver';

FileSaver saveAs(Blob/File/Url, optional DOMString filename, optional Object { autoBom })

var FileSaver = require('file-saver');
var blob = new Blob(["Hello, world!"], {type: "text/plain;charset=utf-8"});
FileSaver.saveAs(blob, "hello world.txt");

var blob = new Blob(["Hello, world!"], {type: "text/plain;charset=utf-8"});
FileSaver.saveAs(blob, "hello world.txt");

FileSaver.saveAs("https://httpbin.org/image", "image.jpg");

var canvas = document.getElementById("my-canvas");
canvas.toBlob(function(blob) {
    saveAs(blob, "pretty image.png");
});

// Note: Ie and Edge don't support the new File constructor,
// so it's better to construct blobs and use saveAs(blob, filename)
var file = new File(["Hello, world!"], "hello world.txt", {type: "text/plain;charset=utf-8"});
FileSaver.saveAs(file);
 

import FileSaver from "file-saver";
export default class fileSave {
    /**
     * 导出Excel文件
     * @param {*} res   文件流
     * @param {*} name  文件名
     */
    static getExcel(res, name) {
        let blob = new Blob([res], {
            type: "application/vnd.ms-excel"
        });
        FileSaver.saveAs(blob, name + ".xlsx");
    }
 
    /**
     * 导出CSV文件
     * @param {*} res   文件流
     * @param {*} name  文件名
     */
    static getCsv(res, name) {
        let blob = new Blob([res], {
            type: "application/vnd.ms-excel"
        });
        FileSaver.saveAs(blob, name + ".csv");
    }
 
    /**
     * 导出图片1
     * @param {*} url 图片地址
     * @param {*} name  文件名
     */
    static getImgURLs(url, name) {
        let last = url.substring(url.lastIndexOf("."), url.length);
        FileSaver.saveAs(url, `${name}${last}`);
    }
     /**
     * 导出图片2
     * @param {*} res 文件流
     * @param {*} name  文件名
     */
    static downLoadImg(res, filename) {
        let blob = new Blob([res], {
            type: "image/jpeg"
        });
        FileSaver.saveAs(blob, `${filename}.jpg`);
    }
}

import exportFile from '@/utils/exportFile'

exportFile.getExcel(res.data, '近年走势')