@joinbox/formsync
v2.4.0
Published
Synchronizes forms and elements between an original form (e.g. one created by Drupal) and another form (e.g. freely created as a template based on mockups).
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Form Sync
Synchronizes forms and elements between an original form (e.g. one created by Drupal) and another form (e.g. freely created as a template based on crazy mockups). Needed as Drupal has strict limits on how filter forms are structured.
Features:
- clones any number of inputs from the original form to a new container
- synchronizes original and cloned form elements
- supports auto submit on cloned form elements
- clones placeholder from original to cloned inputs (if not already set on cloned input)
- sets for attribute on label and id attribute on input (if not already set on cloned input)
- can clone select options to checkbox inputs
Polyfills
- Use a template polyfill if needed
Example
<form id="originalForm">
<label for="firstName">Your First Name:</label>
<input type="text" id="firstName" />
<div id="checkboxes">
<label for="fish"><input type="checkbox" id="fish" checked> Fish</label>
<label for="chicken"><input type="checkbox" id="chicken"> Chicken</label>
</div>
<!-- Without label -->
<select id="dropdown">
<option>1</option>
<option>2</option>
<option>3</option>
</select>
</form>
<!-- The cloned form -->
<div id="clonedForm">
<form-sync data-form-elements-selector="#firstName">
<template>
<!-- Template needs exactly one child -->
<div>
<!-- Original label's textContent is copied to textContent of element with
attribute data-label -->
<label data-label></label>
<!-- Original's element's value is copied to element with attribute data-input -->
<input type="text" data-input/>
</div>
</template>
</form-sync>
<form-sync data-form-elements-selector="#checkboxes input" data-auto-submit="change,submit,blur">
<div>
<h3>Checkboxes</h3>
<!-- One template will be cloned for every input in #checkboxes -->
<template>
<div>
<label>
<span data-label></span>
<input type="checkbox" data-input/>
</label>
</div>
</template>
</div>
</form-sync>
<form-sync data-form-elements-selector="#dropdown">
<template>
<div>
<!-- Options will be cloned from original <select> -->
<select data-input>
</select>
</div>
</template>
</form-sync>
<!-- Will submit #originalForm; gets class .active when #cloned is changed for the
first time-->
<form-submit-button
data-form-selector="#originalForm"
data-change-selector="#clonedForm"
data-changed-class-name="active"
>
<button>Submit</button>
</form-submit-button>
</div>
<script type="module" src="@joinbox/formsync/FormSyncElement.js"></script>
<script type="module" src="@joinbox/formsync/FormSubmitButtonElement.js"></script>
Components
FormSync
Exposed Element
<form-sync></form-sync>
Attributes
data-auto-submit
(optional): Use if certain events on the cloned input should auto-submit the original form. Provide all events that should trigger the auto-submit as a comma delimited list, e.g."blur,input"
. If you want to auto-submit with a debounce, add the debounce after a colon in ms, e.g."input:50,blur"
(for a debounce of 50ms after an input). To submit the form, the component will trigger a click on the original element'sbutton
orinput
withtype="submit"
(this is required in order to work with Drupal's AJAX based forms).data-form-elements-selector
: CSS selector for all input elements that should be cloned and synced between the original and the cloned input.data-submit-on-enter
(optional, boolean attribute): Submit original form if user presses enter while the input is focused. Make sure the cloned form is not wrapped in a element or it will be submitted at the same time (and reload the page if not prevented).
Content
- Use any content you like with the following exceptions:
- Use a
<template>
tag to provide a template for the inputs that will be selected bydata-form-elements-selector
and cloned. - The
<template>
tag must contain exactly one child. - Provide an element with a
data-label
attribute within the template tag, if you wish. This element'stextContent
will be set to the original label'stextContent
. - You must provide an element with a
data-input
attribute within the template tag. This element'schanged
orvalue
property will be synced with the original element.
- Use a
FormSubmitButton
Exposed Element
<form-submit-button></form-submit-button>
Attributes
data-form-selector
(mandatory): CSS selector for the form element that should be submitted when the current element is clicked.data-change-selector
(optional): CSS selector for a HTML element that should be watched forchange
andinput
events; if any of those happens,data-changed-class-name
will be added to the currentform-submit-button
.- data-changed-class-name (optional): Class name that will be added to the current data-submit-button when the element that matches data-change-element is changed. Use class (instead of disabled attribute) as watching for input/change may not be completely fail-safe.
Libraries/Classes
InputSync
Class that synchronizes two inputs (form elements). Example:
const sync = new InputSync();
sync.setup({
originalElement: document.querySelector('#source'),
clonedElement: document.querySelector('#target'),
originalProperty: 'value',
clonedProperty: 'value',
autoSubmit: ['change', 'input'],
});
Synchronizes the property value
of the two inputs #source
and #target
whenever a change event
occurs on one of them. When setup()
is called, also copies value
of original to cloned element
and calls submit()
on closest <form>
of originalElement
whenever a change
or input
event
occurs on the cloned element.