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:
1 2 3 4 | // app/components/person.jsexport default Ember.Component.extend({ name: 'Jill'}); |
1 2 3 4 | {{! 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:
1 2 | {{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:
1 2 | {{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:
1 2 3 4 5 | {{#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:
1 2 3 | <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.
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