eslint/lib/rules/no-empty-pattern.js

   1 /**
   2  * @fileoverview Rule to disallow an empty pattern
   3  * @author Alberto Rodríguez
   4  */
   5 "use strict";
   6
   7 //------------------------------------------------------------------------------
   8 // Rule Definition
   9 //------------------------------------------------------------------------------
  10
  11 module.exports = {
  12     meta: {
  13         type: "problem",
  14
  15         docs: {
  16             description: "disallow empty destructuring patterns",
  17             category: "Best Practices",
  18             recommended: true,
  19             url: "https://eslint.org/docs/rules/no-empty-pattern"
  20         },
  21
  22         schema: [],
  23
  24         messages: {
  25             unexpected: "Unexpected empty {{type}} pattern."
  26         }
  27     },
  28
  29     create(context) {
  30         return {
  31             ObjectPattern(node) {
  32                 if (node.properties.length === 0) {
  33                     context.report({ node, messageId: "unexpected", data: { type: "object" } });
  34                 }
  35             },
  36             ArrayPattern(node) {
  37                 if (node.elements.length === 0) {
  38                     context.report({ node, messageId: "unexpected", data: { type: "array" } });
  39                 }
  40             }
  41         };
  42     }
  43 };