To properly document the results, I must utilize a button to record the identification of a specific color

I'm working on a code that creates a clickable box which changes colors from black to green to white by going through different shades of green whenever the mouse is clicked. What I now need to do is implement a feature that displays the current shade in an output when a button is pressed. For example, if I click the box 12 times to change the color, then hit a "save" button, the currently displayed shade should appear in the output. Below is the code I have so far. I require assistance in adding the button functionality to log the button presses and see which colors people are selecting. Additionally, I am exploring the possibility of saving these outputs directly into an excel file. So when users press the save button, the selected shade would be translated into an excel document.

var div = document.querySelector('#myDiv')
div.dataset.color = 0;
div.addEventListener('click', () => {
div.dataset.color = parseInt(div.dataset.color) + 5;
var c = Math.min(div.dataset.color % 512, 255);
var c2 = Math.max((div.dataset.color % 512) - 255, 0);
div.style.background = 'rgb(' + c2 + ',' + c + ',' + c2 + ')';
})

#myDiv {
width: 200px;
height: 200px;
background: #000000;
}

<div id="myDiv"></div>

Answer №1

Follow these steps:

The color value will be provided in rgb format.

To achieve this with JavaScript:

document.getElementById("myDiv").style.backgroundColor -  this extracts the background color

Using jQuery:

jQuery('#myDiv').css("background-color");

var div = document.querySelector('#myDiv')
div.dataset.color = 0;
div.addEventListener('click', () => {
div.dataset.color = parseInt(div.dataset.color) + 5;
var c = Math.min(div.dataset.color % 512, 255);
var c2 = Math.max((div.dataset.color % 512) - 255, 0);
div.style.background = 'rgb(' + c2 + ',' + c + ',' + c2 + ')';
})

function GetCol()
{
alert(document.getElementById("myDiv").style.backgroundColor);
document.getElementById("ColValue").value = document.getElementById("myDiv").style.backgroundColor;
}
#myDiv {
width: 200px;
height: 200px;
background: #000000;
}
<div id="myDiv"></div>

<input type="button" id="btn" value="save and show col" onClick="GetCol()">

<input type="text" id="ColValue">

After obtaining the color value, consider using a server-side language like PHP to store this value in Excel, a database, or any other desired location.

Answer №2

If you ever need to retrieve the current style of an element, you can utilize getComputedStyle() method:

For a practical example, feel free to check out this link:

https://www.example.com/jsref/tryit.asp?filename=tryjsref_getcomputedstyle

<!DOCTYPE html>
<html>
<body>

<p>Simply click on the button below to see the computed background color for the test div.</p>
<p><button onclick="myFunction()">Give it a try</button></p>
<div id="test" style="height: 50px;background-color: lightblue;">Test Div</div>
<p>The computed background color for the test div is: <span id="demo"></span></p>

<script>
function myFunction(){
    var elem = document.getElementById("test");
    var theCSSprop = window.getComputedStyle(elem, null).getPropertyValue("background-color");
    document.getElementById("demo").innerHTML = theCSSprop;
}
</script>

</body>
</html>

Answer №3

function extractColorOnClick(event) {
  event.preventDefault();
  let element = document.getElementById("mybutton");
  let bgColor = window.getComputedStyle(element, null).getPropertyValue("background-color");

  // perform actions with the extracted background color
}

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