searxng/searx/static/themes/simple/js/searxng.head.js

/**
 * @license
 * (C) Copyright Contributors to the SearXNG project.
 * (C) Copyright Contributors to the searx project (2014 - 2021).
 * SPDX-License-Identifier: AGPL-3.0-or-later
 */
/* global DocumentTouch:readonly */
(function(w, d) {
    'use strict';

    // add data- properties
    var script = d.currentScript  || (function() {
        var scripts = d.getElementsByTagName('script');
        return scripts[scripts.length - 1];
    })();

    // try to detect touch screen
    w.searxng = {
        touch: (("ontouchstart" in w) || w.DocumentTouch && document instanceof DocumentTouch) || false,
        method: script.getAttribute('data-method'),
        autocompleter: script.getAttribute('data-autocompleter') === 'true',
        search_on_category_select: script.getAttribute('data-search-on-category-select') === 'true',
        infinite_scroll: script.getAttribute('data-infinite-scroll') === 'true',
        hotkeys: script.getAttribute('data-hotkeys') === 'true',
        static_path: script.getAttribute('data-static-path'),
        translations: JSON.parse(script.getAttribute('data-translations')),
        theme : {
            // image that is displayed if load of <img src='...'> failed
            img_load_error: 'img/img_load_error.svg'
        }
    };

    // update the css
    var hmtlElement = d.getElementsByTagName("html")[0];
    hmtlElement.classList.remove('no-js');
    hmtlElement.classList.add('js');
    if (w.searxng.touch) {
        hmtlElement.classList.add('touch');
    }
})(window, document);