71 lines
2.3 KiB
JavaScript
71 lines
2.3 KiB
JavaScript
BR.Util = {
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get: function(url, cb) {
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var xhr = new XMLHttpRequest();
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xhr.open('GET', url, true);
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xhr.onload = function() {
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if ((xhr.status === 200 || xhr.status === 0) && xhr.responseText) {
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cb(null, xhr.responseText);
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} else {
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cb(BR.Util.getError(xhr));
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}
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};
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xhr.onerror = function() {
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cb(BR.Util.getError(xhr));
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};
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try {
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xhr.send();
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} catch (e) {
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cb(e);
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}
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},
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getError: function(xhr) {
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var msg = i18next.t('warning.no-response');
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if (xhr.responseText) {
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msg = xhr.responseText;
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} else if (xhr.status || xhr.statusText) {
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msg = xhr.status + ': ' + xhr.statusText;
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}
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return new Error(msg);
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},
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// check if localStorage is available, especially for catching SecurityError
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// when cookie settings are blocking access (Chrome, Pale Moon, older Firefox)
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//
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// see also https://github.com/Modernizr/Modernizr/blob/master/feature-detects/storage/localstorage.js
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//
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// https://developer.mozilla.org/en-US/docs/Web/API/Web_Storage_API/Using_the_Web_Storage_API#Testing_for_support_vs_availability
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// by Mozilla Contributors, with modifications;
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// Any copyright is dedicated to the Public Domain. https://creativecommons.org/publicdomain/zero/1.0/
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localStorageAvailable: function() {
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try {
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var storage = window.localStorage,
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x = '__storage_test__';
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storage.setItem(x, x);
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storage.removeItem(x);
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return true;
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} catch (e) {
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return false;
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}
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},
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// see https://stackoverflow.com/a/37141090/1906123
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getResponsiveBreakpoint: function() {
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var envs = { '1xs': 'd-none', '2sm': 'd-sm-none', '3md': 'd-md-none', '4lg': 'd-lg-none', '5xl': 'd-xl-none' };
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var env = '';
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var $el = $('<div>');
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$el.appendTo($('body'));
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for (var i = Object.keys(envs).length - 1; i >= 0; i--) {
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env = Object.keys(envs)[i];
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$el.addClass(envs[env]);
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if ($el.is(':hidden')) {
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break; // env detected
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}
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}
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$el.remove();
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return env;
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}
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};
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