fix(compiler): allow $any in two-way bindings · angular/angular@4018917 · GitHub
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fix(compiler): allow $any in two-way bindings
Some time ago we narrowed down the expressions we support in two-way bindings, because in most cases any apart from property reads doesn't make sense. This ended up preventing users from using `$any` in the binding since it's considered a function call. These changes update the validation logic to allow `$any`. Fixes #51165.
1 parent 8c5db3c commit 4018917

8 files changed

Lines changed: 163 additions & 3 deletions

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‎packages/compiler-cli/src/ngtsc/typecheck/test/type_check_block_spec.ts‎

Lines changed: 18 additions & 0 deletions

‎packages/compiler-cli/test/compliance/test_cases/r3_view_compiler_listener/GOLDEN_PARTIAL.js‎

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Original file line numberDiff line numberDiff line change
@@ -1016,3 +1016,50 @@ export declare class TestCmp {
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static ɵcmp: i0.ɵɵComponentDeclaration<TestCmp, "ng-component", never, {}, {}, never, never, true, never>;
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}
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/****************************************************************************************************
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* PARTIAL FILE: two_way_to_any.js
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****************************************************************************************************/
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import { Component, Directive, model } from '@angular/core';
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import * as i0 from "@angular/core";
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export class NgModelDirective {
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constructor() {
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this.ngModel = model('');
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}
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}
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NgModelDirective.ɵfac = i0.ɵɵngDeclareFactory({ minVersion: "12.0.0", version: "0.0.0-PLACEHOLDER", ngImport: i0, type: NgModelDirective, deps: [], target: i0.ɵɵFactoryTarget.Directive });
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NgModelDirective.ɵdir = i0.ɵɵngDeclareDirective({ minVersion: "17.1.0", version: "0.0.0-PLACEHOLDER", type: NgModelDirective, isStandalone: true, selector: "[ngModel]", inputs: { ngModel: { classPropertyName: "ngModel", publicName: "ngModel", isSignal: true, isRequired: false, transformFunction: null } }, outputs: { ngModel: "ngModelChange" }, ngImport: i0 });
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i0.ɵɵngDeclareClassMetadata({ minVersion: "12.0.0", version: "0.0.0-PLACEHOLDER", ngImport: i0, type: NgModelDirective, decorators: [{
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type: Directive,
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args: [{ selector: '[ngModel]' }]
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}] });
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export class TestCmp {
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constructor() {
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this.value = 123;
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}
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}
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TestCmp.ɵfac = i0.ɵɵngDeclareFactory({ minVersion: "12.0.0", version: "0.0.0-PLACEHOLDER", ngImport: i0, type: TestCmp, deps: [], target: i0.ɵɵFactoryTarget.Component });
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TestCmp.ɵcmp = i0.ɵɵngDeclareComponent({ minVersion: "14.0.0", version: "0.0.0-PLACEHOLDER", type: TestCmp, isStandalone: true, selector: "test-cmp", ngImport: i0, template: '<input [(ngModel)]="$any(value)">', isInline: true, dependencies: [{ kind: "directive", type: NgModelDirective, selector: "[ngModel]", inputs: ["ngModel"], outputs: ["ngModelChange"] }] });
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i0.ɵɵngDeclareClassMetadata({ minVersion: "12.0.0", version: "0.0.0-PLACEHOLDER", ngImport: i0, type: TestCmp, decorators: [{
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type: Component,
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args: [{
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selector: 'test-cmp',
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template: '<input [(ngModel)]="$any(value)">',
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imports: [NgModelDirective],
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}]
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}] });
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/****************************************************************************************************
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* PARTIAL FILE: two_way_to_any.d.ts
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****************************************************************************************************/
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import * as i0 from "@angular/core";
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export declare class NgModelDirective {
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ngModel: import("@angular/core").ModelSignal<string>;
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static ɵfac: i0.ɵɵFactoryDeclaration<NgModelDirective, never>;
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static ɵdir: i0.ɵɵDirectiveDeclaration<NgModelDirective, "[ngModel]", never, { "ngModel": { "alias": "ngModel"; "required": false; "isSignal": true; }; }, { "ngModel": "ngModelChange"; }, never, never, true, never>;
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}
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export declare class TestCmp {
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value: number;
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static ɵfac: i0.ɵɵFactoryDeclaration<TestCmp, never>;
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static ɵcmp: i0.ɵɵComponentDeclaration<TestCmp, "test-cmp", never, {}, {}, never, never, true, never>;
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}
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‎packages/compiler-cli/test/compliance/test_cases/r3_view_compiler_listener/TEST_CASES.json‎

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Original file line numberDiff line numberDiff line change
@@ -370,6 +370,23 @@
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"failureMessage": "Incorrect template"
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}
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]
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},
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{
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"description": "should generate a two-way binding to a $any expression",
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"inputFiles": [
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"two_way_to_any.ts"
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],
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"expectations": [
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{
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"files": [
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{
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"expected": "two_way_to_any_template.js",
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"generated": "two_way_to_any.js"
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}
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],
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"failureMessage": "Incorrect template"
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}
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]
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}
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]
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}

‎packages/compiler-cli/test/compliance/test_cases/r3_view_compiler_listener/two_way_to_any.ts‎

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Original file line numberDiff line numberDiff line change
@@ -0,0 +1,15 @@
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import {Component, Directive, model} from '@angular/core';
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@Directive({selector: '[ngModel]'})
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export class NgModelDirective {
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ngModel = model('');
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}
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@Component({
9+
selector: 'test-cmp',
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template: '<input [(ngModel)]="$any(value)">',
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imports: [NgModelDirective],
12+
})
13+
export class TestCmp {
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value = 123;
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}

‎packages/compiler-cli/test/compliance/test_cases/r3_view_compiler_listener/two_way_to_any_template.js‎

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Original file line numberDiff line numberDiff line change
@@ -0,0 +1,13 @@
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function TestCmp_Template(rf, ctx) {
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if (rf & 1) {
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$r3$.ɵɵelementStart(0, "input", 0);
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$r3$.ɵɵtwoWayListener("ngModelChange", function TestCmp_Template_input_ngModelChange_0_listener($event) {
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$r3$.ɵɵtwoWayBindingSet(ctx.value, $event) || (ctx.value = $event);
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return $event;
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});
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$r3$.ɵɵelementEnd();
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}
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if (rf & 2) {
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$r3$.ɵɵtwoWayProperty("ngModel", ctx.value);
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}
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}

‎packages/compiler-cli/test/ngtsc/template_typecheck_spec.ts‎

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Original file line numberDiff line numberDiff line change
@@ -657,6 +657,34 @@ runInEachFileSystem(() => {
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);
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});
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it('should be able to cast to any in a two-way binding', () => {
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env.tsconfig({strictTemplates: true, _checkTwoWayBoundEvents: true});
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env.write(
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'test.ts',
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`
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import {Component, Directive, Input, Output, EventEmitter} from '@angular/core';
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@Directive({selector: '[dir]', standalone: true})
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export class Dir {
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@Input() val!: number;
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@Output() valChange = new EventEmitter<number>();
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}
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@Component({
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template: '<input dir [(val)]="$any(invalidType)">',
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standalone: true,
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imports: [Dir],
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})
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export class FooCmp {
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invalidType = 'hello';
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}
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`,
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);
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const diags = env.driveDiagnostics();
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expect(diags.length).toBe(0);
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});
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660688
it('should type check a two-way binding to input/output pair where the input has a wider type than the output', () => {
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env.tsconfig({strictTemplates: true, _checkTwoWayBoundEvents: true});
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env.write(

‎packages/compiler/src/template_parser/binding_parser.ts‎

Lines changed: 14 additions & 3 deletions
Original file line numberDiff line numberDiff line change
@@ -11,12 +11,12 @@ import {
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AbsoluteSourceSpan,
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AST,
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ASTWithSource,
14-
Binary,
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BindingPipe,
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BindingType,
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BoundElementProperty,
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Conditional,
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Call,
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EmptyExpr,
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ImplicitReceiver,
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KeyedRead,
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NonNullAssert,
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ParsedEvent,
@@ -25,10 +25,10 @@ import {
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ParsedPropertyType,
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ParsedVariable,
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ParserError,
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PrefixNot,
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PropertyRead,
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RecursiveAstVisitor,
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TemplateBinding,
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ThisReceiver,
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VariableBinding,
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} from '../expression_parser/ast';
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import {Parser} from '../expression_parser/parser';
@@ -811,6 +811,17 @@ export class BindingParser {
811811
return this._isAllowedAssignmentEvent(ast.expression);
812812
}
813813

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if (
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ast instanceof Call &&
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ast.args.length === 1 &&
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ast.receiver instanceof PropertyRead &&
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ast.receiver.name === '$any' &&
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ast.receiver.receiver instanceof ImplicitReceiver &&
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!(ast.receiver.receiver instanceof ThisReceiver)
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) {
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return this._isAllowedAssignmentEvent(ast.args[0]);
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}
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814825
if (ast instanceof PropertyRead || ast instanceof KeyedRead) {
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return true;
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}

‎packages/compiler/test/render3/r3_template_transform_spec.ts‎

Lines changed: 11 additions & 0 deletions

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