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app_vue/node_modules/eslint-plugin-vue/lib/rules/require-toggle-inside-transition.js

@@ -0,0 +1,65 @@
+/**
+ * @author Yosuke Ota
+ * 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 control the display of the content inside `<transition>`',
+      categories: ['vue3-essential'],
+      url: 'https://eslint.vuejs.org/rules/require-toggle-inside-transition.html'
+    },
+    fixable: null,
+    schema: [],
+    messages: {
+      expected:
+        'The element inside `<transition>` is expected to have a `v-if` or `v-show` directive.'
+    }
+  },
+  /** @param {RuleContext} context */
+  create(context) {
+    /**
+     * Check if the given element has display control.
+     * @param {VElement} element The element node to check.
+     */
+    function verifyInsideElement(element) {
+      if (utils.isCustomComponent(element)) {
+        return
+      }
+      if (
+        !utils.hasDirective(element, 'if') &&
+        !utils.hasDirective(element, 'show')
+      ) {
+        context.report({
+          node: element.startTag,
+          loc: element.startTag.loc,
+          messageId: 'expected'
+        })
+      }
+    }
+
+    return utils.defineTemplateBodyVisitor(context, {
+      /** @param {VElement} node */
+      "VElement[name='transition'] > VElement"(node) {
+        if (node.parent.children[0] !== node) {
+          return
+        }
+        verifyInsideElement(node)
+      }
+    })
+  }
+}