first commit

app_vue/node_modules/eslint-plugin-vue/lib/rules/require-v-for-key.js

@@ -0,0 +1,62 @@
+/**
+ * @author Toru Nagashima
+ * @copyright 2017 Toru Nagashima. All rights reserved.
+ * See LICENSE file in root directory for full license.
+ */
+'use strict'
+
+// ------------------------------------------------------------------------------
+// Requirements
+// ------------------------------------------------------------------------------
+
+const utils = require('../utils')
+
+// ------------------------------------------------------------------------------
+// Rule Definition
+// ------------------------------------------------------------------------------
+
+module.exports = {
+  meta: {
+    type: 'problem',
+    docs: {
+      description: 'require `v-bind:key` with `v-for` directives',
+      categories: ['vue3-essential', 'essential'],
+      url: 'https://eslint.vuejs.org/rules/require-v-for-key.html'
+    },
+    fixable: null,
+    schema: []
+  },
+  /** @param {RuleContext} context */
+  create(context) {
+    /**
+     * Check the given element about `v-bind:key` attributes.
+     * @param {VElement} element The element node to check.
+     */
+    function checkKey(element) {
+      if (utils.hasDirective(element, 'bind', 'key')) {
+        return
+      }
+      if (element.name === 'template' || element.name === 'slot') {
+        for (const child of element.children) {
+          if (child.type === 'VElement') {
+            checkKey(child)
+          }
+        }
+      } else if (!utils.isCustomComponent(element)) {
+        context.report({
+          node: element.startTag,
+          loc: element.startTag.loc,
+          message:
+            "Elements in iteration expect to have 'v-bind:key' directives."
+        })
+      }
+    }
+
+    return utils.defineTemplateBodyVisitor(context, {
+      /** @param {VDirective} node */
+      "VAttribute[directive=true][key.name.name='for']"(node) {
+        checkKey(node.parent.parent)
+      }
+    })
+  }
+}