Changing the HTML button color in javascript

Question

I have a javascript function to change the inner HTML of a button according to a function.

Javascript

function event_click_startpause( event ){
              if( interval === null ){
                  start();
                  event.target.innerText = 'pause';}
              else {
                  pause();
                  event.target.innerText = 'Resume';}
                  }
              function start(){
                 pause();
                 interval = setInterval( count, 1000 );
              function pause() {
                 clearInterval( interval );
                 interval = null; }
                                        }

HTML

<button id="pause" class="pause">Pause</button>

CSS

.pause{
background: #c1580b;
color: #ffb734;
width: 70px;
height: 70px;
line-height: 70px;
display: block;
border-radius: 50%;
text-align: center;
text-decoration:none;
border:2px solid #000;
box-shadow: 0px 0px 0px 3px #c1580b;
font-size: medium;
}

So here how can I change the background color of the button to green when changing inner HTML of the button to "resume"?

I would create another CSS block for Resume, then just change the elements className attribute in your code. — Ryan Wilson
– Ryan Wilson, Commented May 2, 2018 at 19:37

combatc2 · Accepted Answer · 2018-05-02 19:54:05Z

2

See https://jsfiddle.net/xb0yncj7/1/ -

var interval = null;
var count = function() {};

window.event_click_startpause = function(btn) {
    if (interval === null) {
        start();
        btn.innerText = 'pause';
        btn.style.backgroundColor = "#F00"
    } else {
        pause();
        btn.innerText = 'Resume';
        btn.style.backgroundColor = "#0F0";
    }

    function start() {
        pause();
        interval = setInterval(count, 1000);

    }

    function pause() {
        clearInterval(interval);
        interval = null;
    }
}

edited May 2, 2018 at 19:54

answered May 2, 2018 at 19:49

combatc2

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2 Comments

Chathuri Fernando Over a year ago

Thank you for your answer. but this is not working on jsfiddle

combatc2 Over a year ago

Sorry - I didn't save my updates - see jsfiddle.net/xb0yncj7/1

ScaisEdge · Accepted Answer · 2018-05-02 19:36:59Z

2

You could change the background color

 event.target.css('background-color','#ff00ff');

answered May 2, 2018 at 19:36

ScaisEdge

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Comments

Afron Orana · Accepted Answer · 2018-05-02 19:42:11Z

2

let pauseButton = document.getElementById('pause');    
pauseButton.classList.add('green');

and on you style add

.pause.green {
    background: green;
}

or use

let pauseButton = document.getElementById('pause');
pauseButton.style.background = 'green';

answered May 2, 2018 at 19:42

Afron Orana

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1 Comment

Afron Orana Over a year ago

Here is a fiddle of the working background color. Let me know if it works for you.

gaetanoM · Accepted Answer · 2018-05-02 19:45:01Z

2

Though not clear from your JS above, assuming you have the button store as a DOM element in JS, you can use the style method chained with the property of your choosing:

event.target.style.backgroundColor = 'green'

Note: properties are called via camelCase

edited May 2, 2018 at 19:45

gaetanoM

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answered May 2, 2018 at 19:39

Staghouse

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1 Comment

Staghouse Over a year ago

It is possible then that your event data is not a DOM element

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