javascript - How to generate option values into jquery multiselect from js -

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i trying generate dynamically option values in jquery multiselect using javascript.

function prova(data){       var t = 0;       var tmp = new array();       var keys = new array();       $("#select-1").multiselect({       multiple: true,       header: true,       noneselectedtext: "select option",       selectedlist: 1     });     var stringa ="";     $.each(data, function(key,value){     stringa +="<option value=\""+key+"\">"+key+"</option>";     if(t==0){     tmp[0] = key;     }     t++;     });     $("#select-1").html(stringa); }

my values generated in #select-1 that:

<select id="select-1" size="5" name="example-basic" title="basic example" style="display: none;"> <option value="name1">name1</option> <option value="name2">name2</option> <option value="name3">name3</option> <option value="name4">name4</option> <option value="name5">name5</option> </select>

the problem doesn't fill option values jquery multiselect, remains empty.

because using .html() directly on element, replacing elements inside before inserting new elements. might want use .append() like:

$.each(data, function(key,value){     stringa +="<option value=\""+key+"\">"+key+"</option>";     if(t==0){     tmp[0] = key;     }     t++;     });     $("#select-1").append(stringa);

or use previous values well, in .html() usage like:

 $.each(data, function(key,value){     stringa +="<option value=\""+key+"\">"+key+"</option>";     if(t==0){     tmp[0] = key;     }     t++;     });     $("#select-1").html($("#select-1").html()+stringa);

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