pako.js GZIP定义解压和压缩的方法

<script src="https://cdn.bootcss.com/pako/1.0.6/pako.min.js"></script>  或者  npm install pako
 1 function unzip(b64Data){
 2     var strData   = atob(b64Data);
 3     // Convert binary string to character-number array
 4     var charData  = strData.split('').map(function(x){return x.charCodeAt(0);});
 5     // Turn number array into byte-array
 6     var binData   = new Uint8Array(charData);
 7     // // unzip
 8     var data    = pako.inflate(binData);
 9     // Convert gunzipped byteArray back to ascii string:
10     strData   = String.fromCharCode.apply(null, new Uint16Array(data));
11     return decodeURIComponent(strData);
12 }
13 function zip(str){
14      var binaryString = pako.gzip(encodeURIComponent(str), { to: 'string' })
15      return btoa(binaryString);
16 }