@admc.com/eslint-plugin-sn/rules/supports-let.js

ESLint plugin for ServiceNow scriptlets

/*
 * This rule is for testing of the eslint-plugin-sn system itself (and maybe systems that integrate
 * it), not for end user developers checking their ServiceNow code.
 *
 * This was generated by Perplexity AI.
 */
"use strict";

const message =
  "Execution environment doesn't support let declarations.  (Script-independent)";
const messageId =  // eslint-disable-next-line prefer-template
  (require("path").basename(__filename).replace(/[.]js$/, "") + "_msg").toUpperCase();

const esLintObj = {
  meta: {
    type: "problem",
    docs: {
      description:
        "Check whether the execution environment supports let declarations (optionally inverted).",
      category: "Possible Problems",
    },
    messages: {},
    // One optional string option: "invert"
    schema: [
      {
        enum: ["invert"],
      },
    ],
  },

  create: context => {
    // Read optional option: ["invert"]
    const invert = context.options[0] === "invert";

    const ecmaVersion = context.parserOptions && context.parserOptions.ecmaVersion || 5;
    const supportsLet = ecmaVersion >= 6;

    // Effective condition: when should this rule report an error?
    // - Default config (no options): error when let is NOT supported.
    // - With ["error", "invert"]: error when let IS supported.
    const shouldError = invert ? supportsLet : !supportsLet;

    if (!shouldError) {
      // Nothing to do for this file
      return {};
    }

    // Report once per file, on the Program node
    return {
      Program(node) {
        context.report({
          node,
          messageId,
        });
      },
    };
  },
};

esLintObj.meta.messages[messageId] = message;
module.exports = esLintObj;