utf8(str){//中文編碼轉為utf8
         var UTFTranslate = {
         Change:function(pValue){
         return pValue.replace(/[^\u0000-\u00FF]/g,function($0){return escape($0).replace(/(%u)(\w{4})/gi,"&#x$2;")});
         },
         ReChange:function(pValue){
         return unescape(pValue.replace(/&#x/g,'%u').replace(/\\u/g,'
 
%u').replace(/;/g,''));
         }
         };
         return UTFTranslate.Change(str); // "中文sdfsf"
      },

使用時直接呼叫傳入要轉為utf編碼的字串

let str = 'http://test/中文下載路徑需要轉為utf8的檔名'

let url = this.utf8(str)

擴充套件：

//UTF字元轉換
var UTFTranslate = {
Change:function(pValue){
return pValue.replace(/[^\u0000-\u00FF]/g,function($0
 
){return escape($0).replace(/(%u)(\w{4})/gi,"&#x$2;")});
},
ReChange:function(pValue){
return unescape(pValue.replace(/&#x/g,'%u').replace(/\\u/g,'%u').replace(/;/g,''));
}
};
例如：
UTFTranslate.ReChange('中文sdfdf'); //"中文sdfdf"
UTFTranslate.Change('中文sdfsf'); // "中文sdfsf"
 
//Asc轉換
var AscTranslate = {
Change: function(pAscString, pBoxId){
/* 轉ASCII */
box = document.getElementById(pBoxId);
box.innerHTML = '';
for(i = 0; i < pAscString.length; i++)
{
var asc = pAscString.charCodeAt(i);
var str = String.fromCharCode(asc);
box.innerHTML += str + ':' + asc + '<br/>';
}