#default-case-last

#Configuration

import { defineConfig, js } from '@rslint/core';

export default defineConfig([
  js.configs.recommended,
  {
    rules: {
      'default-case-last': 'error',
    },
  },
]);

#Rule Details

Enforce default clauses in switch statements to be last. A switch statement can optionally have a default clause. If present, it's usually the last clause, but it doesn't need to be. It is also allowed to put the default clause before all case clauses, or anywhere between. The behavior is mostly the same as if it was the last clause.

The default clause is still executed only if there is no match in the case clauses (including those defined after the default), but there is also the ability to "fall through" from the default clause to the following clause in the list. However, such flow is not common and can be confusing.

This rule enforces default clauses in switch statements to be last, after all case clauses.

Examples of incorrect code for this rule:

switch (foo) {
  default:
    bar();
    break;
  case 1:
    baz();
    break;
}

switch (foo) {
  case 1:
    break;
  default:
    break;
  case 2:
    break;
}

Examples of correct code for this rule:

switch (foo) {
  case 1:
    bar();
    break;
  default:
    baz();
    break;
}

switch (foo) {
  case 1:
    break;
}

#Original Documentation

https://eslint.org/docs/latest/rules/default-case-last