Add Css on a Html Class Tag With Jquery

Question

I have a submit button which has a color red css style by default. How can I apply a css styling on it on the fly and seeing the result without refreshing the page using jquery?

I have an oncheck query and I want to put the code that will change styling above the return true;

My button

<input type="submit" name="submit" id="submitForm" class="btn btn-primary-alt" value="Submit" onsubmit="return validate_age();" />

The css styling I want to apply on my submit button

.btn-primary-alt:hover {
background-color: #3b8410;
border-bottom: 3px solid #2a620a;
border-color: #2a620a;
color: #fff;
}

My jquery

if($("#age_18").is(":checked"))
{ 
  // This is where I want the css styling will happen.
  return true;
}
else
{
  alert("You must be above 18 years of age.");
  return false;
}

So basically when my checkbox is checked I want to add a css styling on my submit button. thanks

If you return true in the very next line the page will go to the new page before the changed CSS is visible. Do you wish to prevent the page-reload as well as style the check-box; or do you want the changed CSS to be visible and then reload the page (or go to the next page, etc...)? — David Thomas
– David Thomas, Commented Jun 1, 2015 at 12:19
Do it on-change of the radio button. What you are trying (assuming a document.ready) will fire only during the page load OR when submitting the page. — Arghya C
– Arghya C, Commented Jun 1, 2015 at 12:20

Adil Shaikh · Accepted Answer · 2015-06-01 12:20:15Z

1

You can declare your css like this

.btn-primary-alt-hover,.btn-primary-alt:hover {
   background-color: #3b8410;
   border-bottom: 3px solid #2a620a;
   border-color: #2a620a;
   color: #fff;
}

and then you can apply this on your button like this

$("#submitForm").addClass('btn-primary-alt-hover');

answered Jun 1, 2015 at 12:20

Adil Shaikh

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Comments

Nick Daelemans · Accepted Answer · 2015-06-01 12:21:46Z

0

Best solution would be to create a new class (not :hover). So for example

.checked{
 background-color: #3b8410;
 border-bottom: 3px solid #2a620a;
 border-color: #2a620a;
 color: #fff;
}

Then use jQuery to add or remove the class.

$('#submitForm').addClass('checked');

and

$('#submitForm').removeClass('checked');

answered Jun 1, 2015 at 12:21

Nick Daelemans

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1 Comment

jackhammer013 Over a year ago

Wow. This is what I exactly need. I'm about to do the same thing later which is to remove the class if the user unchecked the box. Thank for all your help. I wish I could tick all your answers for it works but I only need to choose one :D

danish farhaj · Accepted Answer · 2015-06-01 12:20:09Z

0

$("#age_18").change(function(){
  if($("#age_18").is(":checked")) {
    // Add Your Styling Here to Submit Button...
    return true;
  } else {
    alert("You must be above 18 years of age.");
    return false;
  }
})

Your Logic is Perfect only one thing.

You have to call it's Change Function to check if the checbox is checked or not..

answered Jun 1, 2015 at 12:20

danish farhaj

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Comments

jamki · Accepted Answer · 2015-06-01 12:21:40Z

0

I would keep the styles away form the CSS as you have it in your separate CSS file anyway.

I'd extend your CSS from: .btn-primary-alt:hover to .btn-primary-alt-active, .btn-primary-alt:hover so that you can apply a class through jQuery to apply the styles. Your JS would look like:

// This is where I want the css styling will happen. $('.btn-primary-alt').addClass('btn-primary-alt-active');

answered Jun 1, 2015 at 12:21

jamki

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Comments

Jason · Accepted Answer · 2015-06-01 12:22:40Z

0

$("#submitForm").addClass("Add your class name");

in your style sheet .the-above-class-name { background-color:[Some color]; color:[Some color]; }

OR

$("#submitForm").css({"background-color":"some color", "color":"some color"});

You can look at W3Schools for reference if you want to learn more about it http://www.w3schools.com/jquery/jquery_css.asp http://www.w3schools.com/jquery/jquery_css_classes.asp

answered Jun 1, 2015 at 12:22

Jason

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