useErrorMessage (since v1.8.0)
Diagnostic Category: lint/nursery/useErrorMessage
Sources:
- Same as:
unicorn/error-message
Enforce passing a message value when creating a built-in error.
This rule enforces a message value to be passed in when creating an instance of a built-in Error object,
which leads to more readable and debuggable code.
Examples
Section titled ExamplesInvalid
Section titled Invalidthrow Error();code-block.js:1:12 lint/nursery/useErrorMessage ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
⚠ Provide an error message for the error.
> 1 │ throw Error();
│ ^^
2 │
ℹ Providing meaningful error messages leads to more readable and debuggable code.
throw Error('');code-block.js:1:12 lint/nursery/useErrorMessage ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
⚠ Error message should not be an empty string.
> 1 │ throw Error('');
│ ^^^^
2 │
ℹ Providing meaningful error messages leads to more readable and debuggable code.
throw new TypeError();code-block.js:1:20 lint/nursery/useErrorMessage ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
⚠ Provide an error message for the error.
> 1 │ throw new TypeError();
│ ^^
2 │
ℹ Providing meaningful error messages leads to more readable and debuggable code.
const error = new AggregateError(errors);code-block.js:1:33 lint/nursery/useErrorMessage ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
⚠ Provide an error message for the error.
> 1 │ const error = new AggregateError(errors);
│ ^^^^^^^^
2 │
ℹ Providing meaningful error messages leads to more readable and debuggable code.
Valid
Section titled Validthrow Error('Unexpected property.');throw new TypeError('Array expected.');const error = new AggregateError(errors, 'Promises rejected.');