angular-docs-cn/modules/angular2/docs/cheatsheet/template-syntax.md

@cheatsheetSection Template syntax @cheatsheetIndex 1 @description

@cheatsheetItem <input [value]="firstName">|[value] Binds property value to the result of expression firstName.

@cheatsheetItem <div [attr.role]="myAriaRole">|[attr.role] Binds attribute role to the result of expression myAriaRole.

@cheatsheetItem <div [class.extra-sparkle]="isDelightful">|[class.extra-sparkle] Binds the presence of the css class extra-sparkle on the element to the truthiness of the expression isDelightful.

@cheatsheetItem <div [style.width.px]="mySize">|[style.width.px] Binds style property width to the result of expression mySize in pixels. Units are optional.

@cheatsheetItem <button (click)="readRainbow($event)">|(click) Calls method readRainbow when a click event is triggered on this button element (or its children) and passes in the event object.

@cheatsheetItem <div title="Hello {{ponyName}}">|{{ponyName}} Binds a property to an interpolated string, e.g. "Hello Seabiscuit". Equivalent to: <div [title]="'Hello' + ponyName">

@cheatsheetItem <p>Hello {{ponyName}}</p>|{{ponyName}} Binds text content to an interpolated string, e.g. "Hello Seabiscuit".

@cheatsheetItem <my-cmp [(title)]="name">|[(title)] Sets up two-way data binding. Equivalent to: <my-cmp [title]="name" (title-change)="name=$event">

@cheatsheetItem <video #movieplayer ...> <button (click)="movieplayer.play()"> </video>|#movieplayer|(click) Creates a local variable movieplayer that provides access to the video element instance in data-binding and event-binding expressions in the current template.

@cheatsheetItem <p *my-unless="myExpression">...</p>|*my-unless The * symbol means that the current element will be turned into an embedded template. Equivalent to: <template [myless]="myExpression"><p>...</p></template>

@cheatsheetItem <p>Card No.: {{cardNumber | myCreditCardNumberFormatter}}</p>|{{cardNumber | myCreditCardNumberFormatter}} Transforms the current value of expression cardNumber via the pipe called creditCardNumberFormatter.

@cheatsheetItem <p>Employer: {{employer?.companyName}}</p>|{{employer?.companyName}} The Elvis operator (?) means that the employer field is optional and if undefined, the rest of the expression should be ignored.