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app_vue/node_modules/eslint-plugin-vue/lib/rules/no-deprecated-props-default-this.js

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+/**
+ * @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:
+        'disallow deprecated `this` access in props default function (in Vue.js 3.0.0+)',
+      categories: ['vue3-essential'],
+      url: 'https://eslint.vuejs.org/rules/no-deprecated-props-default-this.html'
+    },
+    fixable: null,
+    schema: [],
+    messages: {
+      deprecated:
+        'Props default value factory functions no longer have access to `this`.'
+    }
+  },
+  /** @param {RuleContext} context */
+  create(context) {
+    /**
+     * @typedef {object} ScopeStack
+     * @property {ScopeStack | null} upper
+     * @property {FunctionExpression | FunctionDeclaration} node
+     * @property {boolean} propDefault
+     */
+    /** @type {Set<FunctionExpression>} */
+    const propsDefault = new Set()
+    /** @type {ScopeStack | null} */
+    let scopeStack = null
+
+    /**
+     * @param {FunctionExpression | FunctionDeclaration | ArrowFunctionExpression} node
+     */
+    function onFunctionEnter(node) {
+      if (node.type === 'ArrowFunctionExpression') {
+        return
+      }
+      if (scopeStack) {
+        scopeStack = {
+          upper: scopeStack,
+          node,
+          propDefault: false
+        }
+      } else if (node.type === 'FunctionExpression' && propsDefault.has(node)) {
+        scopeStack = {
+          upper: scopeStack,
+          node,
+          propDefault: true
+        }
+      }
+    }
+
+    /**
+     * @param {FunctionExpression | FunctionDeclaration | ArrowFunctionExpression} node
+     */
+    function onFunctionExit(node) {
+      if (scopeStack && scopeStack.node === node) {
+        scopeStack = scopeStack.upper
+      }
+    }
+
+    /**
+     * @param {Expression|SpreadElement|null} node
+     */
+    function isFunctionIdentifier(node) {
+      return node && node.type === 'Identifier' && node.name === 'Function'
+    }
+
+    /**
+     * @param {Expression} node
+     * @returns {boolean}
+     */
+    function hasFunctionType(node) {
+      if (isFunctionIdentifier(node)) {
+        return true
+      }
+      if (node.type === 'ArrayExpression') {
+        return node.elements.some(isFunctionIdentifier)
+      }
+      return false
+    }
+    return utils.defineVueVisitor(context, {
+      onVueObjectEnter(node) {
+        for (const prop of utils.getComponentPropsFromOptions(node)) {
+          if (prop.type !== 'object') {
+            continue
+          }
+          if (prop.value.type !== 'ObjectExpression') {
+            continue
+          }
+          const def = utils.findProperty(prop.value, 'default')
+          if (!def) {
+            continue
+          }
+          const type = utils.findProperty(prop.value, 'type')
+          if (type && hasFunctionType(type.value)) {
+            // ignore function type
+            continue
+          }
+          if (def.value.type !== 'FunctionExpression') {
+            continue
+          }
+          propsDefault.add(def.value)
+        }
+      },
+      ':function': onFunctionEnter,
+      ':function:exit': onFunctionExit,
+      ThisExpression(node) {
+        if (scopeStack && scopeStack.propDefault) {
+          context.report({
+            node,
+            messageId: 'deprecated'
+          })
+        }
+      }
+    })
+  }
+}