text: //编译出错
  /*
  不能执行
   */
   var handler = {
       get:function(target, key ){
       if( key === 'prototype' ){
          return Object.prototype;
       }
       return `hello ${key}`;
  
       },
       apply:function( target, thisBinding, args ){
          return args;
       },
       construct:function( target, args ){
          return {value:args};
       }
   };
  
   var fproxy = new Proxy( function( x, y ){ return x+y;}, handler );
  
   fproxy( 1, 2 )  ;
   new fproxy( 1, 2)  ;
   fproxy.prototype === Object.prototype ;
   fproxy.foo ;
  