npm install crypto-js

import CryptoJS from 'crypto-js/crypto-js'
import urlencode from "urlencode";  //可選

//e為需要加密的字符串
function Hmacstr(e, key = 'your key') {
        let result = CryptoJS.HmacSHA1(e, key);
        let sig = result.toString(CryptoJS.enc.Base64);
        sig = urlencode(sig);//這里也可使用window.btoa(str)進(jìn)行base64編碼 對(duì)應(yīng)解碼atob()  需要注意瀏覽器兼容性
        return sig;
},