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 /** @type {import('../shared/types').Rule} */
  12 module.exports = {
  13     meta: {
  14         type: "problem",
  15
  16         docs: {
  17             description: "disallow template literal placeholder syntax in regular strings",
  18             recommended: false,
  19             url: "https://eslint.org/docs/rules/no-template-curly-in-string"
  20         },
  21
  22         schema: [],
  23
  24         messages: {
  25             unexpectedTemplateExpression: "Unexpected template string expression."
  26         }
  27     },
  28
  29     create(context) {
  30         const regex = /\$\{[^}]+\}/u;
  31
  32         return {
  33             Literal(node) {
  34                 if (typeof node.value === "string" && regex.test(node.value)) {
  35                     context.report({
  36                         node,
  37                         messageId: "unexpectedTemplateExpression"
  38                     });
  39                 }
  40             }
  41         };
  42
  43     }
  44 };