try{
console.log(rrr)
}
catch(err){
console.log(err,err.name,err.message)
}
function myFunction() {
var message, x;
message = document.getElementById("message");
message.innerHTML = "";
x = document.getElementById("demo").value;
try {
if(x == "") throw "值为空";
if(isNaN(x)) throw "不是数字";
x = Number(x);
if(x < 5) throw "太小";
if(x > 10) throw "太大";
}
catch(err) {
message.innerHTML = "错误: " + err;
}
}
try {
let err = new Error
err.name = '我是错误';
err.message = '你来打我啊!'
throw err
} catch(err) {
console.log(err, err.name, err.message)
}
Error属性