| 1 | /**
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| 2 | * @fileoverview Marks all var declarations that are not at the top level
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| 3 | * invalid.
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| 4 | *
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| 5 | * This Source Code Form is subject to the terms of the Mozilla Public
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| 6 | * License, v. 2.0. If a copy of the MPL was not distributed with this
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| 7 | * file, You can obtain one at http://mozilla.org/MPL/2.0/.
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| 8 | */
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| 9 |
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| 10 | ;
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| 11 |
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| 12 | // -----------------------------------------------------------------------------
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| 13 | // Rule Definition
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| 14 | // -----------------------------------------------------------------------------
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| 15 |
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| 16 | var helpers = require("../helpers");
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| 17 |
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| 18 | module.exports = function(context) {
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| 19 | // ---------------------------------------------------------------------------
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| 20 | // Public
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| 21 | // --------------------------------------------------------------------------
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| 22 |
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| 23 | return {
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| 24 | "VariableDeclaration": function(node) {
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| 25 | if (node.kind === "var") {
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| 26 | if (helpers.getIsGlobalScope(context.getAncestors())) {
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| 27 | return;
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| 28 | }
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| 29 |
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| 30 | context.report(node, "Unexpected var, use let or const instead.");
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| 31 | }
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| 32 | }
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| 33 | };
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| 34 | };
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