javascript判断是否支持WebAssembly详解编程语言

       function  iswebasm(){ 
     var useWasm = 0; 
        var webAsmObj = window["WebAssembly"]; 
        if (typeof webAsmObj === "object") 
    { 
            if (typeof webAsmObj["Memory"] === "function") 
      { 
        if ((typeof webAsmObj["instantiateStreaming"] === "function") || (typeof webAsmObj["instantiate"] === "function")) 
          useWasm = 1; 
      } 
    }         
       }