javascript - get selected value from select list

Question

i got a form with a select form elements for month.

<select id="month" name="month">
<option value="Jan">Jan</option>
<option value="Feb">Feb</option>
<option>Mar
<option>Apr
<option>May
<option>Jun
<option>Jul
<option>Aug
<option>Sept
<option>Oct
<option>Nov
<option>Dec
</select>

How do i use javascript to get compare the selected value. for example if i select Feb, the javascript will pop up "you selected feb"

var monthSelect = document.getElementById("month")
var opt = monthSelect.options[monthSelect.selectedIndex]
if(opt.text == "Feb")
{
    alert("Feb selected")
    return false
}

You haven't closed most of your options </option> And why not just use document.getElementById("month").value ...? Also you need to attach an event listener or an attribute event handler — NewToJS
– NewToJS, Commented May 18, 2016 at 11:46
@NewToJS <option> is a tag with optional closing tag. It's better if you close, but it's not invalid. Exactly like <li> or <td> — Marcos Pérez Gude
– Marcos Pérez Gude, Commented May 18, 2016 at 11:47
I agree with the element.value suggestion. As simple as alert(document.getElementById("month").value+ " selected"); — Marcos Pérez Gude
– Marcos Pérez Gude, Commented May 18, 2016 at 11:49
@BenYep you're also missing a couple of semi colons at the end of your javascript — Rachel Gallen
– Rachel Gallen, Commented May 18, 2016 at 11:50

euvl · Accepted Answer · 2016-05-18 12:01:32Z

2

JSFiddle: https://jsfiddle.net/ebrnh047/

Your html:

<select id="month">
  <option value="Jan">Jan</option>
  <option value="Feb">Feb</option>
</select>

Try:

var month = document.getElementById("month");

month.onchange = function() {
  if (month.value == "Feb") {
    alert("Feb selected");
  }
}

edited May 18, 2016 at 12:01

answered May 18, 2016 at 11:53

euvl

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9 Comments

euvl Over a year ago

@BenYap just updated, try it now. You have to but an event handler.

NewToJS Over a year ago

For this to work you will need to place the script tag after the html element otherwise it will cause an error.

Ben Yap Over a year ago

is still not working.. how can i paste my whole code to show

euvl Over a year ago

@BenYap added jsfiddle link, take a look

Ben Yap Over a year ago

@dev-l gotten my jsfiddle?

|

Gerardo Furtado · Accepted Answer · 2016-05-18 12:01:04Z

This is a way to do it with JavaScript only:

First, your HTML:

<select id="month" name="month">
  <option value="Jan">Jan</option>
  <option value="Feb">Feb</option>
  <option value="Mar">Mar</option>
  <option value="Apr">Apr</option>
  <option value="May">May</option>
  <option value="Jun">Jun</option>
  <option value="Jul">Jul</option>
  <option value="Aug">Aug</option>
  <option value="Sep">Sep</option>
  <option value="Oct">Oct</option>
  <option value="Nov">Nov</option>
  <option value="Dec">Dec</option>
</select>

Then, your script:

var monthSelect = document.getElementById("month");

monthSelect.onchange = function(){
  var thisValue = this.value;
  alert(thisValue); 
};

This is the fiddle: https://jsfiddle.net/16sn90tp/

Vladu Ionut · Accepted Answer · 2016-05-18 12:01:42Z

0

Make sure you execute this code on document ready event( window.onload )

  var monthSelect = document.getElementById("month")
  monthSelect.onchange = function() {

    var opt = monthSelect.options[monthSelect.selectedIndex]
    if (opt.text == "Feb") {
      alert("Feb selected")
    }
  }

   <select id="month" name="month">
<option value="Jan">Jan</option>
<option value="Feb">Feb</option>
<option>Mar
<option>Apr
<option>May
<option>Jun
<option>Jul
<option>Aug
<option>Sept
<option>Oct
<option>Nov
<option>Dec
</select>

answered May 18, 2016 at 12:01

Vladu Ionut

8,2231 gold badge23 silver badges30 bronze badges

Comments

Hasnat · Accepted Answer · 2016-05-19 07:44:09Z

0

    Jan Feb

    function myFunction() {
        var monthSelect = document.getElementById("month").value;
        if (monthSelect == "Feb") {
            alert("Feb selected");
            return false;
        }
    }

<select id="month" name="month" onchange="myFunction()">
  <option value="Jan">Jan</option> 
  <option value="Feb">Feb</option>
</select>

edited May 19, 2016 at 7:44

answered May 19, 2016 at 7:30

Hasnat

114 bronze badges

Comments

webta.st.ic · Accepted Answer · 2016-05-18 11:54:57Z

-1

Hi add at first a class called "month" to all of your option tags and one class "monthList" to the select like for example this:

<select class="monthList">
    <option class="month">Jan</option>
    <option class="month">Feb</option>
    <option class="month">Mar</option>
    ...
</select>

After this you need a little bit of JQuery:

$(".monthList .month").click(function(){
    var selectedMonth = $(this).text();
    var showText = "you selected " + selectedMonth;
    alert(showText);
});

Try this, it should work.

answered May 18, 2016 at 11:54

webta.st.ic

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4 Comments

Marcos Pérez Gude Over a year ago

This is not tagged as jquery. So your answer is not correct

Marcos Pérez Gude Over a year ago

I don't downvote, for your information, I only write the comment.

NewToJS Over a year ago

Agreed, jQuery isn't tagged in this question so if you wish to offer a jQuery solution is would be best that you clearly display how to include the jQuery library.

webta.st.ic Over a year ago

Yes, i forgott to look, my fault :)

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