CODEWITHSUNDEEP
javascriptdomdom-eventshtml-selectonchange
Gorbles
Gorbles

Reputation: 1

Change the color of an option when selected

I want an option to change color when selected by a user. For Example: a user selects the red option then a function would run that would change the color red. If the user then selected green then it would change green. etc. 

<select onchange="changeColor();" class="color" id="rgb">
  <option id="red" value="Red">Red</option>
  <option id="green" value="Green">Green</option>
  <option id="blue" value="Blue">Blue</option>
</select>

I started with the function below but I'm not sure where I went wrong.

function changeColor() {
    var red = document.getElementById('red');
    var green = document.getElementById('green');
    var blue = document.getElementById('blue');

    if(event.target.value == red) {
      red.style.color = "red";
    } else if(event.target.value == green) {
      green.style.color = "green";
    } else if(event.target.value == blue) {
      blue.style.color = "blue";
    } else  {
      alert("There was an error!");
      }
  };

Upvotes: 0

Views: 21156

Answers (4)

SuperbWebDeveloper
SuperbWebDeveloper

Reputation: 1

Please check onchange only selected value color will get changed.


$(function() {
//The color of the selected value changed
  jQuery("#state-list").on("change", function() {

    if (jQuery(this).val()) {
    
  let colorselect= jQuery(this).find("option:selected").attr('id');
  jQuery('.statetext option').css("color", "#919ca1");
  jQuery('.statetext').find("option:selected").css("color",  colorselect);
  jQuery('.statetext').css("color",  colorselect)
  } else {
  jQuery('.statetext').css("color", "#919ca1");
  jQuery('.statetext option').css("color", "#919ca1");
  }
  });
});
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/1.9.1/jquery.min.js"></script>
<select id="state-list" name="State" data-name="State" class="statetext"  style="color: rgb(145, 156, 161);">
<option value="">State</option>
<option value="CA"  id="red">CA</option>
<option value="BC" id="yellow">BC</option>
<option value="DE" id="green">DE</option></select>

Upvotes: 0

customcommander
customcommander

Reputation: 18961

I'm not sure you can style an <option> element. You can style the <select> element though. However, color doesn't seem to be a property you can change, background-color is.

If that's all you need you could as well inline the javascript code in the onchange handler attribute. You would need to set the values of the <option> elements to valid css colours.

<select onchange="this.style.backgroundColor=this.value">
  <option value="red">Red</option>
  <option value="green">Green</option>
  <option value="blue">Blue</option>
</select>

Upvotes: 0

eag845
eag845

Reputation: 1013

Try this. When you select an option you will recieve the <select> element in colorParam. If you select the first option, you will get Red in colorParam.value, but you are using IDs in lowerCase, so you can use toLowerCase() function to convert it. Then select the option element and apply styles. 

function changeColor(colorParam) {
    let color = colorParam.value.toLowerCase();
    var optionElement = document.getElementById(color);
    optionElement.style.color = color;
};
<select onchange="changeColor(this);" class="color" id="rgb">
  <option id="red" value="Red">Red</option>
  <option id="green" value="Green">Green</option>
  <option id="blue" value="Blue">Blue</option>
  <option id="white" value="White">White</option>
  <option id="pink" value="Pink">Pink</option>
</select>

Upvotes: 1

nevace
nevace

Reputation: 817

It looks like you haven't added an 'event' parameter to your function. Try this:

function changeColor(event) {
  var red = document.getElementById(red);
  var green = document.getElementById(green);
  var blue = document.getElementById(blue);

  if (event.target.value == red) {
    red.style.color = "red";
  } else if (event.target.value == green) {
    green.style.color = "green";
  } else if (event.target.value == blue) {
    blue.style.color = "blue";
  } else {
    alert("There was an error!");
  }};

Upvotes: 2

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