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Input Helpers

The {{input}} and {{textarea}} helpers in Ember.js are the easiest way to create common form controls. The {{input}} helper wraps the built-in Ember.TextField and Ember.Checkbox views, while {{textarea}} wraps Ember.TextArea. Using these helpers, you can create these views with declarations almost identical to how you'd create a traditional <input> or <textarea> element.

Text fields 

{{input value="http://www.facebook.com"}}

Will become:

<input type="text" value="http://www.facebook.com"/>

You can pass the following standard <input> attributes within the input helper:

`readonly``required``autofocus`
`value``placeholder``disabled`
`size``tabindex``maxlength`
`name``min``max`
`pattern``accept``autocomplete`
`autosave``formaction``formenctype`
`formmethod``formnovalidate``formtarget`
`height``inputmode``multiple`
`step``width``form`
`selectionDirection``spellcheck``type`

If these attributes are set to a quoted string, their values will be set directly on the element, as in the previous example. However, when left unquoted, these values will be bound to a property on the template's current rendering context. For example:

{{input type="text" value=firstName disabled=entryNotAllowed size="50"}}

Will bind the disabled attribute to the value of entryNotAllowed in the current context.

Actions

To dispatch an action on specific events, such as enter or key-press, use the following

{{input value=firstName key-press="updateFirstName"}}

Event Names must be dasherized.

Checkboxes

You can also use the {{input}} helper to create a checkbox by setting its type:

{{input type="checkbox" name="isAdmin" checked=isAdmin}}

Checkboxes support the following properties:

  • checked
  • disabled
  • tabindex
  • indeterminate
  • name
  • autofocus
  • form

Which can be bound or set as described in the previous section.

Text Areas 

{{textarea value=name cols="80" rows="6"}}

Will bind the value of the text area to name on the current context.

{{textarea}} supports binding and/or setting the following properties:

  • value
  • name
  • rows
  • cols
  • placeholder
  • disabled
  • maxlength
  • tabindex
  • selectionEnd
  • selectionStart
  • selectionDirection
  • wrap
  • readonly
  • autofocus
  • form
  • spellcheck
  • required

Binding dynamic attribute

You might need to bind a property dynamically to an input if you're building a flexible form, for example. To achieve this you need to use the {{get}} and {{mut}} in conjunction like shown in the following example:

{{input value=(mut (get person field))}}

The {{get}} helper allows you to dynamically specify which property to bind, while the {{mut}} helper allows the binding to be updated from the input. See the respective helper documentation for more detail.

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