Add components

slider/node_modules/eslint-plugin-vue/lib/rules/valid-v-memo.js

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+/**
+ * @author Yosuke Ota <https://github.com/ota-meshi>
+ * See LICENSE file in root directory for full license.
+ */
+'use strict'
+
+const utils = require('../utils')
+
+module.exports = {
+  meta: {
+    type: 'problem',
+    docs: {
+      description: 'enforce valid `v-memo` directives',
+      categories: ['vue3-essential'],
+      url: 'https://eslint.vuejs.org/rules/valid-v-memo.html'
+    },
+    fixable: null,
+    schema: [],
+    messages: {
+      unexpectedArgument: "'v-memo' directives require no argument.",
+      unexpectedModifier: "'v-memo' directives require no modifier.",
+      expectedValue: "'v-memo' directives require that attribute value.",
+      expectedArray:
+        "'v-memo' directives require the attribute value to be an array.",
+      insideVFor: "'v-memo' directive does not work inside 'v-for'."
+    }
+  },
+  /** @param {RuleContext} context */
+  create(context) {
+    /** @type {VElement | null} */
+    let vForElement = null
+    return utils.defineTemplateBodyVisitor(context, {
+      VElement(node) {
+        if (!vForElement && utils.hasDirective(node, 'for')) {
+          vForElement = node
+        }
+      },
+      'VElement:exit'(node) {
+        if (vForElement === node) {
+          vForElement = null
+        }
+      },
+      /** @param {VDirective} node */
+      "VAttribute[directive=true][key.name.name='memo']"(node) {
+        if (vForElement && vForElement !== node.parent.parent) {
+          context.report({
+            node: node.key,
+            messageId: 'insideVFor'
+          })
+        }
+        if (node.key.argument) {
+          context.report({
+            node: node.key.argument,
+            messageId: 'unexpectedArgument'
+          })
+        }
+        if (node.key.modifiers.length > 0) {
+          context.report({
+            node,
+            loc: {
+              start: node.key.modifiers[0].loc.start,
+              end: node.key.modifiers[node.key.modifiers.length - 1].loc.end
+            },
+            messageId: 'unexpectedModifier'
+          })
+        }
+        if (!node.value || utils.isEmptyValueDirective(node, context)) {
+          context.report({
+            node,
+            messageId: 'expectedValue'
+          })
+          return
+        }
+        if (!node.value.expression) {
+          return
+        }
+        const expressions = [node.value.expression]
+        let expression
+        while ((expression = expressions.pop())) {
+          switch (expression.type) {
+            case 'ObjectExpression':
+            case 'ClassExpression':
+            case 'ArrowFunctionExpression':
+            case 'FunctionExpression':
+            case 'Literal':
+            case 'TemplateLiteral':
+            case 'UnaryExpression':
+            case 'BinaryExpression':
+            case 'UpdateExpression': {
+              context.report({
+                node: expression,
+                messageId: 'expectedArray'
+              })
+              break
+            }
+            case 'AssignmentExpression': {
+              expressions.push(expression.right)
+              break
+            }
+            case 'TSAsExpression': {
+              expressions.push(expression.expression)
+              break
+            }
+            case 'SequenceExpression': {
+              expressions.push(
+                expression.expressions[expression.expressions.length - 1]
+              )
+              break
+            }
+            case 'ConditionalExpression': {
+              expressions.push(expression.consequent, expression.alternate)
+              break
+            }
+          }
+        }
+      }
+    })
+  }
+}