Dynamically creating options for selectbox using javascript

Question

I am dynamically setting the values for a select box using java script

var dropDwnObj = document.getElementById("workingBranchCodeId");
dropDwnObj.options.length = 0;
var anOption = document.createElement("OPTION");
dropDwnObj.options.add(anOption) ;

for(var i = 0; i < jsonResult.subLocationList.length; i++) {
  var anOption = document.createElement("OPTION");
  dropDwnObj.options.add(anOption) ;
  if(selValue == jsonResult.subLocationList[i].displayKey) {
    anOption.innerHTML = jsonResult.subLocationList[i].displayValue;
    anOption.value = jsonResult.subLocationList[i].displayKey;
  }
}

How can I make this value as the selected value for the select box? currently it is coming like an option but i want this option to be the selected one for the select box

Answer 1

dropDwnObj.options [“您的选项”] .selected = true;

Answer 2

Please set select box as multiple selection using multiple attriute like below

<select multiple>
</select>

and set selected attribute is true for options like below

anOption.selected = true;

Fiddle

Hope this will help you.

Answer 3

anOption.selected = true;

worked for me