错误类型
一、编译时错误(语法)
无法捕获！整个js文件无法执行
1、SyntaxError
语法错误，阻塞js执行
Uncaught SyntaxError: Invalid or unexpected token
const 1d = 'lili'
二、运行时错误（异常）
可以捕获（异步不行），出错行之后的代码无法执行
1、TypeError
Uncaught TypeError: Assignment to constant variable.
const a = 1;
a = 2;
Uncaught TypeError: b.reverse is not a function
const a = 3;
a.reverse();
Uncaught TypeError: Cannot read property 'index' of undefined
const c = {name: 'jj', age: 8};
console.log(c.like.index);
2、ReferenceError
Uncaught ReferenceError: f is not defined
const e = f
3、RangeError
Uncaught RangeError: Invalid array length
const g = [1,2,3]
g.length = -5
4、URIError
Uncaught URIError: URI malformed
decodeURI("%")
5、EvalError
?
6、抛异常未捕获
Uncaught Error: I am error
throw new Error('I am error')
收集错误
1、 window.onerror
window.onerror = function(errorMsg, url, lineNumber, columnNumber, errorObj) {
arguments // ["Script error.", "", 0, 0, null, callee: ƒ, Symbol(Symbol.iterator): ƒ]
}
TODO
