SyntaxError - JavaScript 编辑

The SyntaxError object represents an error when trying to interpret syntactically invalid code. It is thrown when the JavaScript engine encounters tokens or token order that does not conform to the syntax of the language when parsing code.

Constructor

SyntaxError()

Creates a new SyntaxError object.

Instance properties

SyntaxError.prototype.message

Error message. Although ECMA-262 specifies that SyntaxError should provide its own message property, in SpiderMonkey, it inherits Error.prototype.message.

SyntaxError.prototype.name

Error name. Inherited from Error.

SyntaxError.prototype.fileName

Path to file that raised this error. Inherited from Error.

SyntaxError.prototype.lineNumber

Line number in file that raised this error. Inherited from Error.

SyntaxError.prototype.columnNumber

Column number in line that raised this error. Inherited from Error.

SyntaxError.prototype.stack

Stack trace. Inherited from Error.

Examples

Catching a SyntaxError

try {
  eval('hoo bar');
} catch (e) {
  console.error(e instanceof SyntaxError);
  console.error(e.message);
  console.error(e.name);
  console.error(e.fileName);
  console.error(e.lineNumber);
  console.error(e.columnNumber);
  console.error(e.stack);
}

Creating a SyntaxError

try {
  throw new SyntaxError('Hello', 'someFile.js', 10);
} catch (e) {
  console.error(e instanceof SyntaxError); // true
  console.error(e.message);                // Hello
  console.error(e.name);                   // SyntaxError
  console.error(e.fileName);               // someFile.js
  console.error(e.lineNumber);             // 10
  console.error(e.columnNumber);           // 0
  console.error(e.stack);                  // @debugger eval code:3:9
}

Specifications

Browser compatibility

BCD tables only load in the browser

See also

• Error