この記事では、Angular のテンプレート構文について詳しく説明します。一定の参考値があるので、困っている友達が参考になれば幸いです。
関連チュートリアルの推奨事項: 「angular チュートリアル」
@Component({ selector: 'app-test-interpolation', templateUrl: './test-interpolation.component.html', styleUrls: ['./test-interpolation.component.css'] }) export class TestInterpolationComponent implements OnInit { title = '插值表达式'; constructor() { } ngOnInit() { } getValue(): string { return '值'; } }
基插值语法欢迎来到 {{title}}!
2+2 = {{2 + 2}}
调用方法{{getValue()}}
@Component({ selector: 'app-test-template-variables', templateUrl: './test-template-variables.component.html', styleUrls: ['./test-template-variables.component.css'] }) export class TestTempRefVarComponent implements OnInit { constructor() { } ngOnInit() { } public saveValue(value: string): void { console.log(value); } }
模板变量{{templateInput.value}}
@Component({ selector: 'app-test-value-bind', templateUrl: './test-value-bind.component.html', styleUrls: ['./test-value-bind.component.css'] }) export class TestValueBindComponent implements OnInit { public imgSrc = './assets/imgs/1.jpg'; constructor() { } ngOnInit() { } }
单向值绑定
test-event-bind- Component.ts
@Component({ selector: 'app-test-event-binding', templateUrl: './test-event-binding.component.html', styleUrls: ['./test-event-binding.component.css'] }) export class TestEventBindingComponent implements OnInit { constructor() { } ngOnInit() { } public btnClick(event: any): void { console.log(event + '测试事件绑定!'); } }
事件绑定
test-twoway-binding.component.ts
@Component({ selector: 'app-test-twoway-binding', templateUrl: './test-twoway-binding.component.html', styleUrls: ['./test-twoway-binding.component.css'] }) export class TestTwowayBindingComponent implements OnInit { public fontSizePx = 14; constructor() { } ngOnInit() { } }
双向绑定 Resizable Text
@Component({ selector: 'app-font-resizer', templateUrl: './font-resizer.component.html', styleUrls: ['./font-resizer.component.css'] }) export class FontResizerComponent implements OnInit { @Input() size: number | string; @Output() sizeChange = new EventEmitter(); constructor() { } ngOnInit() { } decrement(): void { this.resize(-1); } increment(): void { this.resize(+1); } resize(delta: number) { this.size = Math.min(40, Math.max(8, +this.size + delta)); this.sizeChange.emit(this.size); } }
这是子组件
test-ng-if.component.ts
@Component({ selector: 'app-test-ng-if', templateUrl: './test-ng-if.component.html', styleUrls: ['./test-ng-if.component.css'] }) export class TestNgIfComponent implements OnInit { isShow = true; constructor() { } ngOnInit() { } }
*ngIf的用法显示内容
##test-ng-for.component.ts
@Component({ selector: 'app-test-ng-for', templateUrl: './test-ng-for.component.html', styleUrls: ['./test-ng-for.component.css'] }) export class TestNgForComponent implements OnInit { races = [ {name: 'star'}, {name: 'kevin'}, {name: 'kent'} ]; constructor() { } ngOnInit() { } }
*ngFor用法名字列表
- {{i}}-{{name.name}}
test-ng-switch.component.ts
@Component({ selector: 'app-test-ng-switch', templateUrl: './test-ng-switch.component.html', styleUrls: ['./test-ng-switch.component.css'] }) export class TestNgSwitchComponent implements OnInit { status = 1; constructor() { } ngOnInit() { } }
ngSwitch用法Good
Bad
Exception
少数の HTML 属性と DOM 属性 (id など) の間には 1 対 1 のマッピング関係があります;
一部の HTML 属性には、colspan などの DOM 属性がありません;NgClass
test-ng-class.component.ts
@Component({ selector: 'app-test-ng-class', templateUrl: './test-ng-class.component.html', styleUrls: ['./test-ng-class.component.scss'] }) export class TestNgClassComponent implements OnInit { public currentClasses: {}; public canSave = true; public isUnchanged = true; public isSpecial = true; constructor() { } ngOnInit() { this.currentClasses = { 'saveable': this.canSave, 'modified': this.isUnchanged, 'special': this.isSpecial }; } }
NgClass用法设置多个样式
.saveable { font-size: 18px; } .modified { font-weight: bold; } .special { background-color: #ff3300; }
test-ng-style.component.ts
@Component({ selector: 'app-test-ng-style', templateUrl: './test-ng-style.component.html', styleUrls: ['./test-ng-style.component.css'] }) export class TestNgStyleComponent implements OnInit { currentStyles: { }; canSave = false; isUnchanged = false; isSpecial = false; constructor() { } ngOnInit() { this.currentStyles = { 'font-style': this.canSave ? 'italic' : 'normal', 'font-weight': !this.isUnchanged ? 'bold' : 'normal', 'font-size': this.isSpecial ? '36px' : '12px' }; } }
NgStyle用法用NgStyle批量修改内联样式!
test-ng-model.component.ts
@Component({ selector: 'app-test-ng-model', templateUrl: './test-ng-model.component.html', styleUrls: ['./test-ng-model.component.css'] }) export class TestNgModelComponent implements OnInit { name = 'kevin'; constructor() { } ngOnInit() { } }
NgModel的用法ngModel只能用在表单类的元素上面
大文字と小文字
{ 誕生日 | 日付: 'yyyy-MM-dd HH:mm:ss'}}##日付
##{
2.2-2: 2 桁の整数と 2 桁の整数を示します数値は予約された 10 進数です。{
{ pi |number: '2.2-2'}}
例
test-pipe.component.tstest-pipe.component.html@Component({ selector: 'app-test-pipe', templateUrl: './test-pipe.component.html', styleUrls: ['./test-pipe.component.css'] }) export class TestPipeComponent implements OnInit { currentTime: Date = new Date(); str = 'aaa'; money = 34.567; constructor() { } ngOnInit() { window.setInterval( () => { this.currentTime = new Date() } , 1000); } }ログイン後にコピー
管道的用法{{ currentTime | date:'yyyy-MM-dd HH:mm:ss' }}{{ str | uppercase }}{{ money | number: '2.2-2' }}
@Component({ selector: 'app-test-safe-nav', templateUrl: './test-not-null-assert.component.html', styleUrls: ['./test-not-null-assert.component.css'] }) export class TestSafeNavComponent implements OnInit { public currentValue: any = null; constructor() { } ngOnInit() { } }
test-not-null-assert .component.html
安全取值名字:{{currentValue?.name}}
以上がAngular のテンプレート構文の詳細な説明の詳細内容です。詳細については、PHP 中国語 Web サイトの他の関連記事を参照してください。