eslint/lib/rules/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             recommended: false,
  18             url: "https://eslint.org/docs/rules/no-template-curly-in-string"
  19         },
  20
  21         schema: [],
  22
  23         messages: {
  24             unexpectedTemplateExpression: "Unexpected template string expression."
  25         }
  26     },
  27
  28     create(context) {
  29         const regex = /\$\{[^}]+\}/u;
  30
  31         return {
  32             Literal(node) {
  33                 if (typeof node.value === "string" && regex.test(node.value)) {
  34                     context.report({
  35                         node,
  36                         messageId: "unexpectedTemplateExpression"
  37                     });
  38                 }
  39             }
  40         };
  41
  42     }
  43 };