eslint/lib/rules/no-div-regex.js

   1 /**
   2  * @fileoverview Rule to check for ambiguous div operator in regexes
   3  * @author Matt DuVall <http://www.mattduvall.com>
   4  */
   5
   6 "use strict";
   7
   8 //------------------------------------------------------------------------------
   9 // Rule Definition
  10 //------------------------------------------------------------------------------
  11
  12 /** @type {import('../shared/types').Rule} */
  13 module.exports = {
  14     meta: {
  15         type: "suggestion",
  16
  17         docs: {
  18             description: "Disallow division operators explicitly at the beginning of regular expressions",
  19             recommended: false,
  20             url: "https://eslint.org/docs/rules/no-div-regex"
  21         },
  22
  23         fixable: "code",
  24
  25         schema: [],
  26
  27         messages: {
  28             unexpected: "A regular expression literal can be confused with '/='."
  29         }
  30     },
  31
  32     create(context) {
  33         const sourceCode = context.getSourceCode();
  34
  35         return {
  36
  37             Literal(node) {
  38                 const token = sourceCode.getFirstToken(node);
  39
  40                 if (token.type === "RegularExpression" && token.value[1] === "=") {
  41                     context.report({
  42                         node,
  43                         messageId: "unexpected",
  44                         fix(fixer) {
  45                             return fixer.replaceTextRange([token.range[0] + 1, token.range[0] + 2], "[=]");
  46                         }
  47                     });
  48                 }
  49             }
  50         };
  51
  52     }
  53 };