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Select Menu Filter (from json obj)
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| <!-- | |
| DEMO FOR FILTERING JSON OBJECT & POPULATING DROPDOWN FIELDS. | |
| === | |
| jQuery not required for the parsing/filtering | |
| jQuery only required for retrieving json object | |
| === | |
| by: Grant S | |
| --> | |
| <!DOCTYPE html> | |
| <html> | |
| <head> | |
| <meta name="viewport" content="initial-scale=1, width=device-width, maximum-scale=1.0, user-scalable=0, minimal-ui" /> | |
| <title>Json Dropdown Menu</title> | |
| <script src="http://ajax.googleapis.com/ajax/libs/jquery/2.1.0/jquery.min.js"></script> | |
| <style> | |
| body{ | |
| margin:0;padding:0; | |
| font-size:62.5%; | |
| font-family:"Avenir","Helvetica Neue","Helvetica",sans-serif; | |
| } | |
| a{ | |
| text-decoration:none; | |
| color:inherit; | |
| } | |
| .hide{ | |
| display:none; | |
| } | |
| select{ | |
| display:block; | |
| } | |
| </style> | |
| </head> | |
| <body> | |
| <form action="index.php" method=""> | |
| <select name="country" id="country"></select> | |
| <select name="state" id="state"></select> | |
| <select name="city" id="city" class="hide"></select> | |
| <select name="storeId" id="storeName" class="hide"></select> | |
| </form> | |
| <script> | |
| (function($){ | |
| var myJson | |
| ; | |
| $.getJSON("/stores.json", function(json){ | |
| if (json.status) { | |
| myJson = json.stores; | |
| steppedSelect({ | |
| "locations" : myJson | |
| }); | |
| } else { | |
| alert(json.error); | |
| } | |
| }); | |
| var steppedSelect = function(params){ | |
| // PRIVATE VARZ | |
| var cache = this, | |
| geoObj = params.locations || myJson, | |
| stateObj = [], | |
| cityObj = [], | |
| locationObj = [], | |
| tempArray = [], | |
| optionHtml = '<option selected="selected" disabled>select</option>' | |
| ; | |
| var _construct = function(args){ | |
| // AUTO FILTER BY COUNTRY & SET UP CLICK EVENT | |
| initCountry(); | |
| // 3 CLICK EVENTS | |
| initState(); | |
| initCity(); | |
| initLocation(); | |
| }; | |
| var doChange = function(el) { | |
| var event = new Event('change', { | |
| 'view': window, | |
| 'bubbles': false, | |
| 'cancelable': true | |
| }); | |
| var el = el, | |
| canceled = !el.dispatchEvent(event) | |
| ; | |
| if (!canceled) { | |
| return | |
| } else { | |
| console.log("Error: There was a problem with your change handler"); | |
| } | |
| }; | |
| var exec = function(args){ | |
| var parentObj = args.parentObj || {}, | |
| parentKey = args.parentKey || "", | |
| parentMatch = args.parentMatch || "", | |
| childObj = args.childObj || {}, | |
| childKey = args.childKey || "", | |
| childElement = args.childElement | |
| ; | |
| optionHtml = '<option selected="selected" disabled>select</option>'; | |
| for (i = 0; i < parentObj.length; i++) { | |
| var obj = parentObj[i]; | |
| // if we haven't already pulled this particular object out as an HTML option | |
| if ( obj[parentKey] == parentMatch && tempArray.indexOf(obj[childKey]) === -1 ) { | |
| tempArray.push(obj[childKey]); | |
| // if we're setting up the "locations" menu, | |
| // make the value equal to the storeId | |
| if (childKey == "storeName") { | |
| optionHtml += '<option value="'+ obj["storeId"] +'">'+ obj[childKey] +'</option>'; | |
| // else, make the value equal to the name | |
| } else { | |
| optionHtml += '<option value="'+ obj[childKey] +'">'+ obj[childKey] +'</option>'; | |
| } | |
| } | |
| // push all appropriate objects into object | |
| // for looping through a child object | |
| if ( obj[parentKey] == parentMatch ) { | |
| childObj.push(obj); | |
| } | |
| } | |
| tempArray = []; | |
| childElement.innerHTML = optionHtml; | |
| childElement.className = childElement.className.replace(/(?:^|\s)hide(?!\S)/, ''); | |
| }; | |
| var initCountry = function(args){ | |
| for (i = 0; i < geoObj.length; i++) { | |
| var obj = geoObj[i]; | |
| if ( tempArray.indexOf(obj["country"]) === -1 ) { | |
| tempArray.push(obj["country"]); | |
| if (obj["country"] == "United States") { | |
| optionHtml += '<option selected="selected" value="'+ obj["country"] +'">'+ obj["country"] +'</option>'; | |
| } else { | |
| optionHtml += '<option value="'+ obj["country"] +'">'+ obj["country"] +'</option>'; | |
| } | |
| } | |
| } | |
| tempArray = []; | |
| document.getElementById("country").innerHTML = optionHtml; | |
| document.getElementById("country").className = document.getElementById("country").className.replace(/(?:^|\s)hide(?!\S)/, ''); | |
| exec({ | |
| parentObj: geoObj, | |
| parentKey: "country", | |
| parentMatch: document.getElementById("country").options[document.getElementById("country").selectedIndex].value, | |
| childObj: stateObj, | |
| childKey: "state", | |
| childElement: document.getElementById("state") | |
| }); | |
| document.getElementById("country").addEventListener("change", function(e){ | |
| if ( document.getElementById("city").className.indexOf("hide")===-1 ) { | |
| document.getElementById("city").className += " hide"; | |
| } | |
| if ( document.getElementById("storeName").className.indexOf("hide")===-1 ) { | |
| document.getElementById("storeName").className += " hide"; | |
| } | |
| if (stateObj.length) { | |
| stateObj = []; | |
| } | |
| exec({ | |
| parentObj: geoObj, | |
| parentKey: "country", | |
| parentMatch: this.value, | |
| childObj: stateObj, | |
| childKey: "state", | |
| childElement: document.getElementById("state") | |
| }); | |
| if ( document.getElementById("state").length < 3 && document.getElementById("state").options[1].value == "" ) { | |
| var elem = document.getElementById("state"), | |
| elemClass = elem.className | |
| ; | |
| elem.selectedIndex = 1; | |
| doChange(elem); | |
| if ( elemClass.indexOf("hide")===-1 ) { | |
| elem.className += " hide"; | |
| } | |
| } | |
| }); | |
| }; | |
| var initState = function(args){ | |
| document.getElementById("state").addEventListener("change", function(e){console.log(e); | |
| if (cityObj.length) { | |
| cityObj = []; | |
| } | |
| if ( document.getElementById("storeName").className.indexOf("hide")===-1 ) { | |
| document.getElementById("storeName").className += " hide"; | |
| } | |
| exec({ | |
| parentObj: stateObj, | |
| parentKey: "state", | |
| parentMatch: this.value, | |
| childObj: cityObj, | |
| childKey: "city", | |
| childElement: document.getElementById("city") | |
| }); | |
| }); | |
| }; | |
| var initCity = function(args){ | |
| document.getElementById("city").addEventListener("change", function(e){console.log(e); | |
| if (locationObj.length) { | |
| locationObj = [] | |
| } | |
| exec({ | |
| parentObj: cityObj, | |
| parentKey: "city", | |
| parentMatch: this.value, | |
| childObj: locationObj, | |
| childKey: "storeName", | |
| childElement: document.getElementById("storeName") | |
| }); | |
| }); | |
| }; | |
| var initLocation = function(args){ | |
| document.getElementById("storeName").onchange = function(){ | |
| selectedLocation = this.value; | |
| alert(selectedLocation); | |
| }; | |
| }; | |
| _construct(); | |
| }; | |
| })(jQuery); | |
| </script> | |
| </body> | |
| </html> |
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Parses single json object through object literal, jQuery not required!