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95 lines
3.0 KiB
ReStructuredText
95 lines
3.0 KiB
ReStructuredText
.. Copyright (C) 2016 Champs Libres Cooperative SCRLFS
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Permission is granted to copy, distribute and/or modify this document
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under the terms of the GNU Free Documentation License, Version 1.3
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or any later version published by the Free Software Foundation;
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with no Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts.
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A copy of the license is included in the section entitled "GNU
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Free Documentation License".
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Javascript functions
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####################
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Some function may be useful to manipulate elements on the page.
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Show-hide elements according to a form state
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*********************************************
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The module ``ShowHide`` will allow you to show/hide part of your page using a specific test.
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This must be use inside a javascript module.
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Usage
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=====
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In this module, the module will listen to all input given in the ``container_from`` div, and will show or hide the content of the ``container_target`` according to the result of the ``test`` function.
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.. code-block:: html+twig
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<div id="container_from">
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{{ form_row(form.accompagnementRQTHDate) }}
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</div>
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<div id="container_target">
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{{ form_row(form.accompagnementComment) }}
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</div>
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.. code-block:: javascript
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import { ShowHide } from 'ShowHide/show_hide.js';
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var
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from = document.getElementById("container_from"),
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target = document.getElementById("container_target")
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;
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new ShowHide({
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froms: [from], // the value of from should be an iterable
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container: [ressources_comment], // the value of container should be an iterable
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test: function(froms, event) {
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// iterate over each element of froms
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for (let f of froms.values()) {
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// get all input inside froms
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for (let input of f.querySelectorAll('input').values()) {
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if (input.value === 'autre') {
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return input.checked;
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}
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}
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}
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return false;
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}
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});
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Once instantiated, the class ``ShowHide`` will:
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1. get all input from each element inside the ``froms`` values
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2. attach an event listener (by default, ``change``) to each input inside each entry in ``froms``
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3. each time the event is fired, launch the function ``test``
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4. show the element in the container given in ``container``, if the result of ``test`` is true, or hide them otherwise.
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The test is also launched when the page is loaded.
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Show/hide while the user enter data: using the ``input`` event
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==============================================================
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One can force to use another event on the input elements, instead of the default ``'change'`` event.
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For achieving this, use the `event_name` option.
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.. code-block:: javascript
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new ShowHide({
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froms: froms,
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test: test_function,
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container: containers ,
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// using this option, we use the event `input` instead of `change`
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event_name: 'input'
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});
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Examples
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========
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.. literalinclude:: js-functions/show_hide.js
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:language: javascript
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