control

A form control. Validate user input, display an error message and save data to the model.

Example

The HTML:

<div class="js-name-control">
    <label>
        Your name:
        <input class="control-input js-input" autofocus/>
    </label>
    <span class="js-feedback-message"></span>
</div>

The JS:

var Control = require('control');

var nameControl = Control.create({
    el:             document.querySelector('.js-name-control'),
    filters:        [trim],
    validators:     [[required, 'Your name is required so we can contact you.']]
});

See example/index.html for a working example.

Methods

Control.create(options) : ControlPresenter

Create and wire up a new control.

Options

• el - The control element. Must contain a .js-input element and should probably also contain a .js-feedback-message element.
• type - The type of the control. Used for creating an input view. Optional. Defaults to text.
• name - The name of the control. Used for retrieving the control from a collection. e.g. first-name. Optional.
• event - The event(s) emitted by the input view which should trigger validation. Optional. Defaults to blur.
• filters - The filters. Optional.
• validators - The validators. Optional.

ControlPresenter.getName() : String

Get the control name.

ControlPresenter.getValue() : String

Get the control value.

ControlPresenter.setValue(value : String)

Set the control value.

ControlPresenter.isValid() : Boolean

Get the result of the last call to validate().

ControlPresenter.focus()

Focus the input.

ControlPresenter.clear()

Clear the value and validation state.

ControlPresenter.validate()

Filters the input value, validates the input value and updates the control view accordingly.

ControlPresenter.on(type : String, callback : Function)

ControlPresenter.off(type : String, callback : Function)

Events

change

Emitted after the input value has changed.

validate

Emitted after each call to validate().

Arguments

• valid - Whether the input is valid.
• value - The filtered value.

Advanced

If you want to display your feedback messages in a different way e.g. in a popup, you can create your own ControlView and pass it to a new ControlPresenter instance.