动态 select 无法使用 Materialise

Question

实现 css 不使用动态 select。它与国家合作良好，但不显示国家。

我认为 jquery 有问题。

请检查我的代码片段。

我已经在互联网上检查了所有内容。但是对我没有任何作用。

var country_arr = new Array("Afghanistan", "Albania", "Algeria", "American Samoa", "Angola", "Anguilla", "Antartica", "Antigua and Barbuda", "Argentina", "Armenia" );

// States
var s_a = new Array();
s_a[0]="";
s_a[1]="Badakhshan|Badghis|Baghlan|Balkh|Bamian|Farah|Faryab|Ghazni|Ghowr|Helmand|Herat|Jowzjan|Kabol|Kandahar|Kapisa|Konar|Kondoz|Laghman|Lowgar|Nangarhar|Nimruz|Oruzgan|Paktia|Paktika|Parvan|Samangan|Sar-e Pol|Takhar|Vardak|Zabol";
s_a[2]="Berat|Bulqize|Delvine|Devoll (Bilisht)|Diber (Peshkopi)|Durres|Elbasan|Fier|Gjirokaster|Gramsh|Has (Krume)|Kavaje|Kolonje (Erseke)|Korce|Kruje|Kucove|Kukes|Kurbin|Lezhe|Librazhd|Lushnje|Malesi e Madhe (Koplik)|Mallakaster (Ballsh)|Mat (Burrel)|Mirdite (Rreshen)|Peqin|Permet|Pogradec|Puke|Sarande|Shkoder|Skrapar (Corovode)|Tepelene|Tirane (Tirana)|Tirane (Tirana)|Tropoje (Bajram Curri)|Vlore";
s_a[3]="Adrar|Ain Defla|Ain Temouchent|Alger|Annaba|Batna|Bechar|Bejaia|Biskra|Blida|Bordj Bou Arreridj|Bouira|Boumerdes|Chlef|Constantine|Djelfa|El Bayadh|El Oued|El Tarf|Ghardaia|Guelma|Illizi|Jijel|Khenchela|Laghouat|M'Sila|Mascara|Medea|Mila|Mostaganem|Naama|Oran|Ouargla|Oum el Bouaghi|Relizane|Saida|Setif|Sidi Bel Abbes|Skikda|Souk Ahras|Tamanghasset|Tebessa|Tiaret|Tindouf|Tipaza|Tissemsilt|Tizi Ouzou|Tlemcen";
s_a[4]="Eastern|Manu'a|Rose Island|Swains Island|Western";
s_a[5]="Andorra la Vella|Bengo|Benguela|Bie|Cabinda|Canillo|Cuando Cubango|Cuanza Norte|Cuanza Sul|Cunene|Encamp|Escaldes-Engordany|Huambo|Huila|La Massana|Luanda|Lunda Norte|Lunda Sul|Malanje|Moxico|Namibe|Ordino|Sant Julia de Loria|Uige|Zaire";
s_a[6]="Anguilla";
s_a[7]="Antartica";
s_a[8]="Barbuda|Redonda|Saint George|Saint John|Saint Mary|Saint Paul|Saint Peter|Saint Philip";
s_a[9]="Antartica e Islas del Atlantico Sur|Buenos Aires|Buenos Aires Capital Federal|Catamarca|Chaco|Chubut|Cordoba|Corrientes|Entre Rios|Formosa|Jujuy|La Pampa|La Rioja|Mendoza|Misiones|Neuquen|Rio Negro|Salta|San Juan|San Luis|Santa Cruz|Santa Fe|Santiago del Estero|Tierra del Fuego|Tucuman";
s_a[10]="Aragatsotn|Ararat|Armavir|Geghark'unik'|Kotayk'|Lorri|Shirak|Syunik'|Tavush|Vayots' Dzor|Yerevan";
// <!-- -->



function populateStates( countryElementId, stateElementId ){
 
 var selectedCountryIndex = document.getElementById( countryElementId ).selectedIndex;

 var stateElement = document.getElementById( stateElementId );
 
 stateElement.length=0; // Fixed by Julian Woods
 stateElement.options[0] = new Option('Select State','');
 stateElement.selectedIndex = 0;
 
 var state_arr = s_a[selectedCountryIndex].split("|");
 
 for (var i=0; i<state_arr.length; i++) {
  stateElement.options[stateElement.length] = new Option(state_arr[i],state_arr[i]);
 }
  $("#" + stateElementId).material_select();
}

function populateCountries(countryElementId, stateElementId){
 // given the id of the <select> tag as function argument, it inserts <option> tags
 var countryElement = document.getElementById(countryElementId);
 countryElement.length=0;
 countryElement.options[0] = new Option('Select Country','-1');
 countryElement.selectedIndex = 0;
 for (var i=0; i<country_arr.length; i++) {
  countryElement.options[countryElement.length] = new Option(country_arr[i],country_arr[i]);
 }

 // Assigned all countries. Now assign event listener for the states.

 if( stateElementId ){
  countryElement.onchange = function(){
   populateStates( countryElementId, stateElementId );
  };
 }
}

populateCountries("country", "state");

$(function () {
    $(document).ready(function () {
        var max_fields = 10; //maximum input boxes allowed
        var wrapper = $("#raghav"); //Fields wrapper
        var add_button = $(".addmore"); //Add button ID

        var x = 1; //initlal text box count
        $(add_button).click(function (e) { //on add input button click
            e.preventDefault();
            if (x < max_fields) { //max input box allowed
                x++; //text box increment
                $(wrapper).append('Select Country: <select id="country'+x+'" name="country" class="country"></select>  Select State: <select id="state'+x+'" name="state" class="state"></select>');
    
                populateCountries("country"+x+"", "state"+x+"");

            }
        });
});

});

<head>
<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/materialize/0.97.6/css/materialize.min.css">
</head>
<body>
<div class="form-group" id="raghav">  
Select Country:<select id="country" name ="country" ></select> 
Select State: <select name ="state" id ="state" class="state"></select> 
</div>  
  
<div class="button-div">
    <input type="button" name="addmore" class="addmore" value="Add More">
    </div>  
  
    

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
 <script src="https://cdnjs.cloudflare.com/ajax/libs/materialize/0.97.6/js/materialize.min.js"></script> 
     <script>
     $(document).ready(function() {
        $('select').material_select();     //select js
    });
  </script>
</body>

Answer 1

material_select(). 为 select 创建一个列表 ul，为 options 创建一个列表 li，然后 shows 这个 ul as dropdown 当您调用 material_select 时，只有国家/地区下拉列表会填充数据，并且 ul 仅为此创建，因此它的 options 正在显示。

当您填充状态下拉列表时 ul 因为它没有创建，因此它不会显示您在填充状态下拉列表时需要调用 material_select。

function populateStates( countryElementId, stateElementId ){

    var selectedCountryIndex = document.getElementById( countryElementId ).selectedIndex;

    var stateElement = document.getElementById( stateElementId );

    stateElement.length=0;  // Fixed by Julian Woods
    stateElement.options[0] = new Option('Select State','');
    stateElement.selectedIndex = 0;

    var state_arr = s_a[selectedCountryIndex].split("|");

    for (var i=0; i<state_arr.length; i++) {
        stateElement.options[stateElement.length] = new Option(state_arr[i],state_arr[i]);
    }
    $("#" + stateElementId).material_select();
}

动态 select 无法使用 Materialise

Dynamic select not working with Materialize

javascript

css

jquery

select

materialize