TypeError(类型错误) 对象用来表示值的类型非预期类型时发生的错误。
语法
new TypeError([message[, fileName[, lineNumber]]])
参数
message 消息- 可选. 描述此错误
fileName 文件名- 可选. 引起该异常的代码所在的文件的名字。
lineNumber 行号- 可选. 引起该异常的代码的行号。
描述
当传入函数的操作数或参数的类型并非操作符或函数所预期的类型时,将抛出一个 TypeError 类型错误。
属性
TypeError.prototype- 允许为一个 TypeError 类型错误附加属性。
方法
全局 TypeError 不包含任何方法,不过,它将从原型链中继承一些方法。
TypeError 类型错误实例
属性
TypeError.prototype.constructor- Specifies the function that created an instance's prototype.
TypeError.prototype.message- Error message. Although ECMA-262 specifies that
TypeErrorshould provide its ownmessageproperty, in SpiderMonkey, it inheritsError.prototype.message. TypeError.prototype.name- Error name. Inherited from
Error. TypeError.prototype.fileName- Path to file that raised this error. Inherited from
Error. TypeError.prototype.lineNumber- Line number in file that raised this error. Inherited from
Error. TypeError.prototype.columnNumber- Column number in line that raised this error. Inherited from
Error. TypeError.prototype.stack- Stack trace. Inherited from
Error.
方法
Although the TypeError prototype object does not contain any methods of its own, TypeError instances do inherit some methods through the prototype chain.
示例
示例: 捕获类型错误
try {
null.f();
} catch (e) {
console.log(e instanceof TypeError); // true
console.log(e.message); // "null has no properties"
console.log(e.name); // "TypeError"
console.log(e.fileName); // "Scratchpad/1"
console.log(e.lineNumber); // 2
console.log(e.columnNumber); // 2
console.log(e.stack); // "@Scratchpad/2:2:3\n"
}
示例: 创建一个类型错误
try {
throw new TypeError('Hello', "someFile.js", 10);
} catch (e) {
console.log(e instanceof TypeError); // true
console.log(e.message); // "Hello"
console.log(e.name); // "TypeError"
console.log(e.fileName); // "someFile.js"
console.log(e.lineNumber); // 10
console.log(e.columnNumber); // 0
console.log(e.stack); // "@Scratchpad/2:2:9\n"
}
规范
| 规范 | 状态 | 说明 |
|---|---|---|
| ECMAScript 3rd Edition (ECMA-262) TypeError |
Standard | 初始定义。 |
| ECMAScript 5.1 (ECMA-262) TypeError |
Standard | |
| ECMAScript 2015 (6th Edition, ECMA-262) TypeError |
Standard |
浏览器兼容性
| 特性 | Chrome | Firefox (Gecko) | Internet Explorer | Opera | Safari |
|---|---|---|---|---|---|
| 基础支持 | (Yes) | (Yes) | (Yes) | (Yes) | (Yes) |
| 特性 | Android | Chrome for Android | Firefox Mobile (Gecko) | IE Mobile | Opera Mobile | Safari Mobile |
|---|---|---|---|---|---|---|
| 基础支持 | (Yes) | (Yes) | (Yes) | (Yes) | (Yes) | (Yes) |