Created
November 15, 2016 14:57
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| if (typeof define === 'function' && define.amd) { | |
| define('persistent-input', ['jquery', 'localstorage'], function($, localstorage) { | |
| var registeredInputs = {}; | |
| var cachedData = {}; | |
| /** | |
| * @params {string} key[, {string} value] | |
| * @returns {null} | |
| */ | |
| function data() { | |
| // Simple validation | |
| if (!arguments.length) return null; | |
| // Clone the arguments as they're special | |
| var args = [], key; | |
| for ( key in arguments ) { | |
| if (arguments.hasOwnProperty(key)) args.push(arguments[key]); | |
| } | |
| key = args.shift(); | |
| if (args.length) { | |
| var val = args.shift(); | |
| localstorage.setItem('persistent-input-'+key, val); | |
| cachedData[key] = val; | |
| } | |
| if (typeof cachedData[key] === 'undefined') { | |
| cachedData[key] = localstorage.getItem('persistent-input-'+key); | |
| } | |
| return cachedData[key]; | |
| } | |
| // This will scan the entire document for unknown persistent inputs | |
| function scanNewInputs() { | |
| // Search for persistent inputs | |
| $("[data-persistent]").each(function() { | |
| // Fetch jq object & their name | |
| var $this = $(this), | |
| name = $this.data('persistent') || $this.attr('name') || $this.attr('id'); | |
| // Simple validation | |
| if (!name) return; | |
| // Don't register twice | |
| if (registeredInputs[name]) return; | |
| // Set their value from cache | |
| registeredInputs[name] = $this; | |
| var value = data(name); | |
| if ( typeof value !== 'undefined' ) { | |
| $this.val(data(name)); | |
| } | |
| $this.on('change', function() { | |
| // Store for later use | |
| data(name, $this.val()); | |
| }) | |
| }); | |
| } | |
| // Let the scanner listen for changes on the entire document | |
| $(document.body).on('DOMSubtreeModified', scanNewInputs); | |
| return data; | |
| }); | |
| } else { | |
| console.error("Could not initialize Persistent input without RequireJS"); | |
| } |
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