javascript - 获得一些选定的选项javascript [重复](get a few selected option javascript [duplicate])

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((这个问题已经在这里有了答案)

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get multiple values from dropdownlist in JavaScript (3 answers)

(从JavaScript的下拉列表中获取多个值 （3个答案）)

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How do I get the selected value from a dropdown list in case there are more than one selected item using JavaScript?

(万一使用JavaScript有多个选定项，如何从下拉列表中获得选定值？)

like this:

(像这样：)

<select name"nana" id="nana">
  <option value="0"</option>
  <option value="1"</option>
  <option selected="selected" value="2"</option>
  <option value="3"</option>
  <option selected="selected" value="4"</option>
</select>

I tried:

(我试过了：)

var e = document.getElementById("nana");
var strUser = e.options[e.selectedIndex].value;

document.querySelector("nana").value;

and its return only the first selected value (2), how can i get all of the selected items?

(并且它仅返回第一个选定的值（2），如何获得所有选定的项？)

  ask by EladMag translate from so

Answer 1

add multiple="multiple" for multiple for more than 1 select

(为多个选择多个添加“多个”)

 var selectNana = document.getElementById("nana"); var selectedNana = []; for (var i = 0; i < selectNana.length; i++) { if (selectNana.options[i].selected) selectedNana.push(selectNana.options[i].value); } console.log(selectedNana); 

 <select name"nana" id="nana" multiple="multiple" > <option value="0">0</option> <option value="1">1</option> <option selected="selected" value="2">2</option> <option value="3">3</option> <option selected="selected" value="4">4</option> </select>