sam marshall
49 lines
1.8 KiB
JavaScript
49 lines
1.8 KiB
JavaScript
// This file is part of Moodle - http://moodle.org/
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//
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// Moodle is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// Moodle is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with Moodle. If not, see <http://www.gnu.org/licenses/>.
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/**
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* Submit button JavaScript. All submit buttons will be automatically disabled once the form is
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* submitted, unless that submission results in an error/cancelling the submit.
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*
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* @module core_form/submit
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* @package core_form
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* @copyright 2019 The Open University
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* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
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* @since 3.8
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*/
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/**
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* Initialises submit buttons.
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*
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* @param {String} elementId Form element
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*/
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export const init = (elementId) => {
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const button = document.getElementById(elementId);
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button.form.addEventListener('submit', function() {
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// Only disable it if the browser is really going to another page as a result of the
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// submit.
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const disableAction = function() {
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button.disabled = true;
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};
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window.addEventListener('beforeunload', disableAction);
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// If there is no beforeunload event as a result of this form submit, then the form
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// submit must have been cancelled, so don't disable the button if the page is
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// unloaded later.
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setTimeout(function() {
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window.removeEventListener('beforeunload', disableAction);
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}, 0);
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}, false);
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};
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