React使用crypto-js计算md5、sha1值等

import React, { Component } from 'react';
import {Button, Upload} from 'antd';
import { UploadOutlined } from '@ant-design/icons';

var fs = require('fs');
import CryptoJS  from "crypto-js"
var FileSaver = require('file-saver');


class index extends Component {
    
    getSha1=(value)=>{

        let reader = new FileReader();
        // 读取文件 value
        reader.readAsArrayBuffer(value);

        reader.onload = function () {
            var wordArray = CryptoJS.lib.WordArray.create(reader.result);
            var hash = CryptoJS.SHA1(wordArray).toString(); // 计算其他加密算法，SHA1改为MD5、SHA256即可
            console.log('hash:', hash)
        };
    }

    beforeUpload=(file)=>{
        const fileList = [file]
        this.getSha1(file)
    }
    
    render() {
        return (
            <div>
                <Upload
                    beforeUpload={this.beforeUpload}
                >
                    <Button type='primary' icon={<UploadOutlined />}>上传文件</Button>
                </Upload>
            </div>
        );
    }
}

export default index;