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app_vue/node_modules/eslint-plugin-vue/lib/rules/no-v-for-template-key.js

@@ -0,0 +1,48 @@
+/**
+ * @author Yosuke Ota
+ */
+'use strict'
+
+const utils = require('../utils')
+
+// ------------------------------------------------------------------------------
+// Rule Definition
+// ------------------------------------------------------------------------------
+
+module.exports = {
+  meta: {
+    type: 'problem',
+    docs: {
+      description: 'disallow `key` attribute on `<template v-for>`',
+      categories: ['essential'],
+      url: 'https://eslint.vuejs.org/rules/no-v-for-template-key.html'
+    },
+    fixable: null,
+    schema: [],
+    messages: {
+      disallow:
+        "'<template v-for>' cannot be keyed. Place the key on real elements instead."
+    }
+  },
+  /** @param {RuleContext} context */
+  create(context) {
+    return utils.defineTemplateBodyVisitor(context, {
+      /** @param {VDirective} node */
+      "VElement[name='template'] > VStartTag > VAttribute[directive=true][key.name.name='for']"(
+        node
+      ) {
+        const element = node.parent.parent
+        const keyNode =
+          utils.getAttribute(element, 'key') ||
+          utils.getDirective(element, 'bind', 'key')
+        if (keyNode) {
+          context.report({
+            node: keyNode,
+            loc: keyNode.loc,
+            messageId: 'disallow'
+          })
+        }
+      }
+    })
+  }
+}