no-template-curly-in-string.js

   1 /**
   2  * @fileoverview Warn when using template string syntax in regular strings
   3  * @author Jeroen Engels
   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 template literal placeholder syntax in regular strings",
  17             category: "Possible Errors",
  18             recommended: false,
  19             url: "https://eslint.org/docs/rules/no-template-curly-in-string"
  20         },
  21
  22         schema: []
  23     },
  24
  25     create(context) {
  26         const regex = /\$\{[^}]+\}/u;
  27
  28         return {
  29             Literal(node) {
  30                 if (typeof node.value === "string" && regex.test(node.value)) {
  31                     context.report({
  32                         node,
  33                         message: "Unexpected template string expression."
  34                     });
  35                 }
  36             }
  37         };
  38
  39     }
  40 };