js unicode处理

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//岗位详细界面 var str="1、\u000D\u21B52、\u000D\u21B53";   var pad = function() {  var tbl = [];  return function(num, n) {   var len = n-num.toString().length;   if (len <= 0) return num;   if (!tbl[len]) tbl[len] = (new Array(len+1)).join('0');   return tbl[len] + num;  } }();   setValue_Instructions(str);   console.log(str) console.log("---------------------") console.log(getValue_Instructions());      "\u21B5".charCodeAt(0).toString(16) --------------------------------------------------------------    "\u21B5".charCodeAt(0).toString(16)       String.fromCharCode(72,69,76,76,79)