keydown(event){
console.log(event);
//下键：40 上键：38
if(event.keyCode==38){
//按的上键
this.listIndex--;
if(this.listIndex<0){
this.listIndex=this.arr.length-1;
}
this.wd=this.arr[this.listIndex];
}
else if(event.keyCode==40){
//说明你按的是下键
this.listIndex++;
if(this.listIndex>this.arr.length-1){
this.listIndex=0;
}
this.wd=this.arr[this.listIndex];
}else if(event.keyCode==13){
//如果你按的是enter，那么就跳转到百度搜索结果
window.open("https://www.baidu.com/s?wd="+this.wd);
}
}
}
}
</script>
<style scoped>
</style>
