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Angular 2 Template Syntax

  • We could use this component in our template as follows:This tells Angular that whenever myTodo changes, Angular needs to automatically update the todo component by calling the model setter with a new todo.Event BindingsNow, let’s make the component a bit more interesting and add an event.This tells Angular that if an event called “complete” is fired, it should invoke onCompletingTodo.Now, let’s look at TodoCmp itself.The component declares that is has an input property named “model” and an output property “complete”.
  • So we can use it to fire events, and Angular can use it to listen to events.As you can see, the core syntax of property and event bindings is very simple.
  • And since this is such a common pattern, Angular provides syntax sugar to remove the boilerplate.We refer to the [()] brackets are “banana in a box”.
  • This is an extremely naive implementation of NgModel, but it shows how to implement the two-way data-binding behavior: the input will be updated when the text changes, and the text field will be updated when the input changes.Note that in opposite to Angular 1, you can tell which bindings are “two-way” and which are “one-way” just by looking at the template.
  • is the same asLet’s RecapInput and output properties are the public API of a directive.Data flows into a directive via input properties.Data flows out of a directive via output properties.You can update input properties using property bindings.You can subscribe to output properties using event bindings.You can use property and event bindings to implement two-way bindings.Angular provides syntax sugar for two-way bindings, interpolation, and passing constants.



Angular Template Syntax – Angular



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