JS抛异常

手动抛异常

function funa() {
  let a = 2;
  if (a !== 1) {
    throw new Error("报错：a!==1"); //手动抛异常
  }
}

捕获异常

try {
  funa();
} catch (err) {
  console.log("err:", err);
  //Error: 报错：a!==1 at funa (error.js:4:11)...
  console.log("err.message:", err.message); // 报错：a!==1
}
console.log("end");