JavaScript错误处理机制全面分析讲解

const err = new Error('代码出错了');
err.message; // 代码出错了

const err = new Error('代码出错了');
err.name; // 'Error'
err.stack; //'Error: 出错了\n    at <anonymous>:1:5'

test; 
//Uncaught ReferenceError: assd is not defined at <anonymous>:1:1

console.log() = 1
// Uncaught ReferenceError: Invalid left-hand side in assignment

const 1a;
Uncaught SyntaxError: Invalid or unexpected token
5 = 6;
Uncaught SyntaxError: Invalid left-hand side in assignment

let a; 
a(); 
//VM7449:1 Uncaught TypeError: b is not a function at <anonymous>:1:1

const arr = new Array(-5);
//VM7833:1 Uncaught RangeError: Invalid array lengthat <anonymous>:1:13
function foo(){
  foo();
};
foo();
//Uncaught RangeError: Maximum call stack size exceeded

decodeURI('%');
//VM8142:1 Uncaught URIError: URI malfORMedat decodeURI (<anonymous>)at <anonymous>:1:1

funtion CustomError(message){
  this.message = message;
  this.name = 'CustomError';
};
CustomError.prototype = new Error();
CustomError.prototype.construct = CustomError;
throw new CustomError('这是一个自定义错误');
//CustomError {message: '这是一个自定义错误', name: 'CustomError'};

throw new Error('出错了');
console.log('该行代码不会执行');

thorw '23';
console.log('该行代码不会执行');
throw true;
throw {};
throw [];
throw 20;

throw new Error('出错了');
throw (new Error('出错了'));

    try {
      throw new Error('出错了');
    } catch (e) {
      console.error(e)
    };
    console.log('后续代码继续执行'); //后续代码继续执行

    try {
      throw new Error('出错了');
    } catch (e) {
      console.log('catch')
    }finally{
       console.log('finally');
    }