ReferenceError

ReferenceError object represents an error when a non-existent variable is referenced.

构造函数

ReferenceError()
创建新的 ReferenceError 对象。

实例特性

ReferenceError.prototype.message
Error message. Although ECMA-262 specifies that ReferenceError should provide its own message property, in SpiderMonkey , it inherits Error.prototype.message .
ReferenceError.prototype.name
Error name. Inherited from Error .
ReferenceError.prototype.fileName
Path to file that raised this error. Inherited from Error .
ReferenceError.prototype.lineNumber
Line number in file that raised this error. Inherited from Error .
ReferenceError.prototype.columnNumber
Column number in line that raised this error. Inherited from Error .
ReferenceError.prototype.stack
Stack trace. Inherited from Error .

范例

Catching a ReferenceError

try {
  let a = undefinedVariable
} catch (e) {
  console.log(e instanceof ReferenceError)  // true
  console.log(e.message)                    // "undefinedVariable is not defined"
  console.log(e.name)                       // "ReferenceError"
  console.log(e.fileName)                   // "Scratchpad/1"
  console.log(e.lineNumber)                 // 2
  console.log(e.columnNumber)               // 6
  console.log(e.stack)                      // "@Scratchpad/2:2:7\n"
}
					

Creating a ReferenceError

try {
  throw new ReferenceError('Hello', 'someFile.js', 10)
} catch (e) {
  console.log(e instanceof ReferenceError)  // true
  console.log(e.message)                    // "Hello"
  console.log(e.name)                       // "ReferenceError"
  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
ECMAScript (ECMA-262)
The definition of 'ReferenceError' in that specification.

浏览器兼容性

更新 GitHub 上的兼容性数据
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Chrome Edge Firefox Internet Explorer Opera Safari Android webview Chrome for Android Firefox for Android Opera for Android Safari on iOS Samsung Internet Node.js
ReferenceError Chrome 1 Edge 12 Firefox 1 IE 5.5 Opera 5 Safari 1 WebView Android 1 Chrome Android 18 Firefox Android 4 Opera Android 10.1 Safari iOS 1 Samsung Internet Android 1.0 nodejs 0.1.100
ReferenceError() 构造函数 Chrome 1 Edge 12 Firefox 1 IE 5.5 Opera 5 Safari 1 WebView Android 1 Chrome Android 18 Firefox Android 4 Opera Android 10.1 Safari iOS 1 Samsung Internet Android 1.0 nodejs 0.1.100

图例

完整支持
完整支持

另请参阅

Metadata