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home/ags/node_modules/eslint-plugin-es-x/lib/rules/no-trailing-commas.js

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+/**
+ * @author Toru Nagashima <https://github.com/mysticatea>
+ * See LICENSE file in root directory for full license.
+ */
+"use strict"
+
+const { getSourceCode } = require("eslint-compat-utils")
+const { isCommaToken } = require("../utils")
+
+module.exports = {
+    meta: {
+        docs: {
+            description: "disallow trailing commas in array/object literals.",
+            category: "ES5",
+            recommended: false,
+            url: "http://eslint-community.github.io/eslint-plugin-es-x/rules/no-trailing-commas.html",
+        },
+        fixable: null,
+        messages: {
+            forbidden:
+                "ES5 trailing commas in array/object literals are forbidden.",
+        },
+        schema: [],
+        type: "problem",
+    },
+    create(context) {
+        const sourceCode = getSourceCode(context)
+        return {
+            "ArrayExpression, ArrayPattern, ObjectExpression, ObjectPattern"(
+                node,
+            ) {
+                const token = sourceCode.getLastToken(node, 1)
+                if (isCommaToken(token)) {
+                    context.report({ node, messageId: "forbidden" })
+                }
+            },
+        }
+    },
+}