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443c22e | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 | /**
* @fileoverview Rule to enforce `default` clauses in `switch` statements to be last
* @author Milos Djermanovic
*/
"use strict";
//------------------------------------------------------------------------------
// Rule Definition
//------------------------------------------------------------------------------
/** @type {import('../types').Rule.RuleModule} */
module.exports = {
meta: {
type: "suggestion",
docs: {
description:
"Enforce `default` clauses in `switch` statements to be last",
recommended: false,
url: "https://eslint.org/docs/latest/rules/default-case-last",
},
schema: [],
messages: {
notLast: "Default clause should be the last clause.",
},
},
create(context) {
return {
SwitchStatement(node) {
const cases = node.cases,
indexOfDefault = cases.findIndex(c => c.test === null);
if (
indexOfDefault !== -1 &&
indexOfDefault !== cases.length - 1
) {
const defaultClause = cases[indexOfDefault];
context.report({
node: defaultClause,
messageId: "notLast",
});
}
},
};
},
};
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