javascript

In many websites you find multiple check box form to select your interest, or to select multiple options.

That can be created by using HTML check box.

Here to make a input as a text box we need type="checkbox".

name is name given to text box

value property specifies what value a text box holds.

id is used to uniquely identify this text box in HTML Document.

To get this text box value we can use JavaScript.

To get element by Id we can use document.getElementById().

Inside getElementById() we pass the elements id.

in above code we can see that check box id is checkbox1

and to get value we can use value property of getElementById()

how to get checkbox value in javascript with getelementbyid()

var bike = document.getElementById("checkbox1");         
     if(bike.checked){
         ele.push(bike.value);
   }

How to get multiple checkbox value in javascript with getElementById()

Here to select multiple check boxes we selected each check box one by one.

Select Element by id using document.getElementById().

then check checkbox is checked or not.

If checked then push in array.

How to get checkbox value in JQuery

JQuery makes code simple and easy, to select checkbox we can use either name, id or input type checkbox.

We can use any of above ways as per need.

Here we will use checkbox id to select checkbox.

You can download JQuery or include from CDN

We checked check box is selected or not using ($('#checkbox1').is(":checked"))

Here checkbox1 is id of checkbox.

To get the value of check box $('#checkbox1').val();

How to get multiple checkbox value in JQuery

$("input:checkbox[name=cb1]:checked").each(function(){                  
ele.push($(this).val());
});

Here Input check box with name cb1 is checked then for each element get checkbox value and push to array.

It is very easy to access multiple check box value using JavaScript and JQuery.

You can use these in your web page like in form and to capture user information.

Add active class to a div on javascript onclick event

Here we are applying a style to a simple div.

Steps to add a css class on click event

1. Create a div with specific id (here id=”text”)
2. on click on div call a method makeActive()
3. Define a function makeActive() in side <script> tag.
4. Inside makeActive() getElementById
5. Get Elements classList and add class active.
6. Use the innerHTML to change to element Text

Add active class onclick javascript to HTML ul List to make menu

Here We have ul list elements to create horizontal menu on click on any element an active class is applied on it and if any one have already active class then remove it.

1. create a ul menu with li items
2. make menu display inline using css
3. inside script tag select all anchor in menu class
4. on click event find is there any active class in li
5. if found then remove it
6. add active class to clicked element.

Reference

Add active class to a div on Jquery onclick event

Here we have taken example of only a single div on click on div it will add an active class on div.

you can download or include Jquery from CDN

To achieve this follow these steps

1. Define active css class
2. Include Latest Jquery jquery.min.js file to your html
3. Create a div with id text.
4. Write Jquery code inside script tag.
5. Check for document ready state if ready then
6. write click function for #text
7. add a class using jquery addClass()
8. Change the div content using Jquery text().

Add active class onclick JQuery to HTML ul List to make menu

As we already seen how to add a active class in HTML List.

The same work we will do with JQuery.

JQuery provides easy way to add and remove css class in any element

1. Create a simple HTML unordered list
2. Style list to make inline and provide margin
3. define a active style in css
4. Include Jquery latest jquery.min.js file
5. Write Jquery event that will work on document ready
6. On click on anchor tag inside li first remove all active class from li then add active class in parent li of anchor tag.

Jquery provides addClass() and removeClass() to add and remove any css class.

You can learn how to access parent class id in JQuery

Add Hover effect in HTML menu using JQuery hover()

To add hover effect we used below code.

This will add and remove css class on hover.