Source @ github

throw

throw – Throw an exception.

Description

throw expression

Parameters

Name Description Type Default Optional
expression No

Examples

Example #1 – throw example
try {
	throw 42;
	console.log('Never executed.');
}
catch (e) {
	console.log(e);  // 42
}
Example #2 – throw example
try {
	throw new Error(42);
	console.log('Never executed.');
}
catch (e) {
	console.log(e);          // Error: 42(…)
	console.log(e.message);  // 42
	console.log(e.name);     // Error
}
Example #3 – throw example
function myException (code, message) {
	this.name = 'myException';
	this.code = code;
	this.message = message;
}

try {
	throw new myException(42, 'Custom exception.');
	console.log('Never executed.');
}
catch (e) {
	console.log(e.code);     // 42
	console.log(e.message);  // Custom exception.
	console.log(e.name);     // myException
}

External references