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@throws

Syntax​

@throws {ErrorType} description

Overview​

@throws documents an exception that a function can throw. Use it once for each distinct error type a function may raise. Both the type and description are optional, but providing both makes the contract explicit.

Examples​

Type only​

/**
 * @throws {RangeError}
 */
function setAge(age) {
  if (age < 0) throw new RangeError('Age cannot be negative.');
  this._age = age;
}

Type and description​

/**
 * @throws {TypeError} When `name` is not a string.
 * @throws {RangeError} When `age` is less than zero.
 */
function createUser(name, age) {}

Without a type​

/**
 * @throws Will throw if the database connection fails.
 */
async function saveRecord(record) {}

See also​