js input输入事件兼容性问题

if(navigator.userAgent.indexOf(‘Android‘) > -1){
                   $("#sign").on("input", function(){
                       //console.log(this.value);
                       $(".num").html(self.globalNum - this.value.length);
                   });
               }else{
                   $("#sign").on("keyup compositionend", function(){
                       //console.log(this.value);
                       $(".num").html(self.globalNum - this.value.length);
                   });
               }