我正在尝试构建一个小黑杰克助手,但错误消息没有抛出,如果有输入,它总是说打我!帮助请提前谢谢你。
<script>
function count(){
var base=0;
var input= document.getElementById("input").value;
var total= base + input;
try{
if (isNaN(input)){
throw "Input is not a number";
}
if(input=""){
throw "Input is empty!";
}
if(total=""){
throw "No value added!";
}
document.getElementById("total").innerHTML = total;
if (total >= 14){
document.getElementById("command").innerHTML= "Hold on";
}else{
document.getElementById("command").innerHTML= "Hit me!";
}}
catch(err){
document.getElementById("error").innerHTML= err;
}}
</script>