Introduction

bobtail-form is a simple implementation of two way data binding for forms, built on bobtail and bobbtail-json-cell. Serialization is handled by the jquery.serialize-json extension, and changes are detected using mutation-summary (itself built on MutationObservers).

The JSON structure of the form is specified by the name attributes of its controls (i.e., input, select and textarea elements), as described here. In addition to refreshing whenever an element's value or checked state changes, the form is reserialized if any controls are added, removed, or renamed.

We use window.requestAnimationFrame to schedule UI redraws when the form becomes dirty. This ensures minimal lag, as
we only need to reserialize the form at most once per redraw.

API

exports($formFn, serializeOpts, lag)

generates a jQuery form and a JsonCell bound to its current serialization, and returns an object containing both.

Parameters

$formFn: function()
Function used to create the form. Takes a single argument, the JsonCell to which the form is serialized.

serializeOpts: object
options object to pass to jquery.serializeJson

Returns: {{$form: jQuery, cell: JsonCell}}

Example

``
let rx = require('bobtail');
let bobtailForm = require('bobtail-form').default;
let {bind, rxt} = rx;
let {tags} = rxt;
let {form, strong, input} = tags;

$('body').append(
bobtailForm(jsonCell => form([
input.number({name: 'base:number', value: 3}),
input.number({name: 'exponent:number', value: 2}),
strong(bind(() => jsonCell.data.base ** jsonCell.data.exponent))
])).$form
)
`

Installation

npm install bobtail-form`