feat(valid-v-model): add support for type assertions and non-null expressions (#2393)

Author: auvred

lib/rules/valid-v-model.js

@@ -49,6 +49,10 @@ function isOptionalChainingMemberExpression(node) {
  * @returns {boolean} `true` if the node can be LHS.
  */
 function isLhs(node) {
+  if (node.type === 'TSAsExpression' || node.type === 'TSNonNullExpression') {
+    return isLhs(node.expression)
+  }
+
   return node.type === 'Identifier' || node.type === 'MemberExpression'
 }
 

tests/lib/rules/valid-v-model.js

@@ -143,6 +143,51 @@ tester.run('valid-v-model', rule, {
     {
       filename: 'comment-value.vue',
       code: '<template><MyComponent v-model="/**/" /></template>'
+    },
+    {
+      filename: 'test.vue',
+      code: '<template><MyComponent v-model="a as string"></MyComponent></template>',
+      languageOptions: {
+        parserOptions: {
+          parser: require.resolve('@typescript-eslint/parser')
+        }
+      }
+    },
+    {
+      filename: 'test.vue',
+      code: '<template><MyComponent v-model="a!"></MyComponent></template>',
+      languageOptions: {
+        parserOptions: {
+          parser: require.resolve('@typescript-eslint/parser')
+        }
+      }
+    },
+    {
+      filename: 'test.vue',
+      code: '<template><MyComponent v-model="a as unknown as string"></MyComponent></template>',
+      languageOptions: {
+        parserOptions: {
+          parser: require.resolve('@typescript-eslint/parser')
+        }
+      }
+    },
+    {
+      filename: 'test.vue',
+      code: '<template><MyComponent v-model="a!!!!"></MyComponent></template>',
+      languageOptions: {
+        parserOptions: {
+          parser: require.resolve('@typescript-eslint/parser')
+        }
+      }
+    },
+    {
+      filename: 'test.vue',
+      code: '<template><MyComponent v-model="(((a!) as unknown)! as string)!"></MyComponent></template>',
+      languageOptions: {
+        parserOptions: {
+          parser: require.resolve('@typescript-eslint/parser')
+        }
+      }
     }
   ],
   invalid: [
@@ -241,6 +286,66 @@ tester.run('valid-v-model', rule, {
       filename: 'test.vue',
       code: '<template><input v-model="(a?.b).c.d"></template>',
       errors: ["'v-model' directive has potential null object property access."]
+    },
+    {
+      filename: 'test.vue',
+      code: '<template><MyComponent v-model="a() as string"></MyComponent></template>',
+      errors: [
+        "'v-model' directives require the attribute value which is valid as LHS."
+      ],
+      languageOptions: {
+        parserOptions: {
+          parser: require.resolve('@typescript-eslint/parser')
+        }
+      }
+    },
+    {
+      filename: 'test.vue',
+      code: '<template><MyComponent v-model="a()!"></MyComponent></template>',
+      errors: [
+        "'v-model' directives require the attribute value which is valid as LHS."
+      ],
+      languageOptions: {
+        parserOptions: {
+          parser: require.resolve('@typescript-eslint/parser')
+        }
+      }
+    },
+    {
+      filename: 'test.vue',
+      code: '<template><MyComponent v-model="a() as unknown as string"></MyComponent></template>',
+      errors: [
+        "'v-model' directives require the attribute value which is valid as LHS."
+      ],
+      languageOptions: {
+        parserOptions: {
+          parser: require.resolve('@typescript-eslint/parser')
+        }
+      }
+    },
+    {
+      filename: 'test.vue',
+      code: '<template><MyComponent v-model="a()!!!!"></MyComponent></template>',
+      errors: [
+        "'v-model' directives require the attribute value which is valid as LHS."
+      ],
+      languageOptions: {
+        parserOptions: {
+          parser: require.resolve('@typescript-eslint/parser')
+        }
+      }
+    },
+    {
+      filename: 'test.vue',
+      code: '<template><MyComponent v-model="(((a()!) as unknown)! as string)!"></MyComponent></template>',
+      errors: [
+        "'v-model' directives require the attribute value which is valid as LHS."
+      ],
+      languageOptions: {
+        parserOptions: {
+          parser: require.resolve('@typescript-eslint/parser')
+        }
+      }
     }
   ]
 })

typings/eslint-plugin-vue/util-types/ast/ts-ast.ts

@@ -6,6 +6,7 @@ import * as ES from './es-ast'
 import { TSESTree } from '@typescript-eslint/types'
 export type TSNode =
   | TSAsExpression
+  | TSNonNullExpression
   | TSTypeParameterInstantiation
   | TSPropertySignature
   | TSMethodSignatureBase
@@ -20,6 +21,11 @@ export interface TSAsExpression extends HasParentNode {
   typeAnnotation: any
 }
 
+export interface TSNonNullExpression extends HasParentNode {
+  type: 'TSNonNullExpression'
+  expression: ES.Expression
+}
+
 export interface TSTypeParameterInstantiation extends HasParentNode {
   type: 'TSTypeParameterInstantiation'
   params: TypeNode[]