ember-templates

ember-templates Module

Parent: ember

Ember templates are executed by HTMLBars, an HTML-friendly version of Handlebars. Any valid Handlebars syntax is valid in an Ember template.

Showing a property

Templates manage the flow of an application's UI, and display state (through the DOM) to a user. For example, given a component with the property "name", that component's template can use the name in several ways:

// app/components/person.js
export default Ember.Component.extend({
  name: 'Jill'
});

{{! app/components/person.hbs }}
{{name}}
<div>{{name}}</div>
<span data-name={{name}}></span>

Any time the "name" property on the component changes, the DOM will be updated.

Properties can be chained as well:

{{aUserModel.name}}
<div>{{listOfUsers.firstObject.name}}</div>

Using Ember helpers

When content is passed in mustaches {{}}, Ember will first try to find a helper or component with that name. For example, the if helper:

{{if name "I have a name" "I have no name"}}
<span data-has-name={{if name true}}></span>

The returned value is placed where the {{}} is called. The above style is called "inline". A second style of helper usage is called "block". For example:

{{#if name}}
  I have a name
{{else}}
  I have no name
{{/if}}

The block form of helpers allows you to control how the UI is created based on the values of properties.

A third form of helper is called "nested". For example here the concat helper will add " Doe" to a displayed name if the person has no last name:

<span data-name={{concat firstName (
 if lastName (concat " " lastName) "Doe"
)}}></span>

Ember's built-in helpers are described under the Ember.Templates.helpers namespace. Documentation on creating custom helpers can be found under Ember.Helper.

Invoking a Component

Ember components represent state to the UI of an application. Further reading on components can be found under Ember.Component.