There are two methods by which you can dynamically check the currently selected checkbox by changing the checked property of the input type.
Method 1: Using the prop method: The input can be accessed and its property can be set by using the prop method. This method manipulates the ‘checked’ property and sets it to true or false depending on whether we want to check or uncheck it.
Syntax:
$("element").prop("checked", true)
Example:
<!DOCTYPE html> <head> <title> How to check a checkbox with jQuery? </title> <script src= </script> </head> <body> <center> <h1 style="color: green"> neveropen </h1> <b> jQuery Check/Uncheck Checkbox </b> <p> <input type="checkbox" name="option" id="front"> Front-End <input type="checkbox" name="option" id="back"> Back-End </p> <p> <button type="button" class="check-front"> Subscribe Front-End </button> <button type="button" class="check-back"> Subscribe Back-End </button> <button type="button" class="reset"> Reset </button> </p> <script type="text/javascript"> $(document).ready(function() { $(".check-front").click(function() { $("#front").prop("checked", true); }); $(".check-back").click(function() { $("#back").prop("checked", true); }); $(".reset").click(function() { $("#front").prop("checked", false); $("#back").prop("checked", false); }); }); </script> </center> </body> </html> |
Output:
- Before clicking any button:
- Clicking on the button:
- Clicking on the ‘Reset’ button:
Method 2: Using the attr method: It is similar to the above method and more suitable for older jQuery versions. The input can be accessed and its property can be set by using the attr method. We have to manipulate the ‘checked’ property and set it to true or false depending on whether we want to check or uncheck it.
Note: It is necessary to add a click method when setting the attribute to ‘true’ to make sure that the option gets updated in the option group.
Syntax:
$("element").attr("checked", true)
Example:
<!DOCTYPE html> <head> <title> How to check a checkbox with jQuery? </title> <script src= </script> </head> <body> <center> <h1 style="color: green"> neveropen </h1> <b> jQuery Check/Uncheck Checkbox </b> <p> <input type="checkbox" name="option" id="Front"> Front-End <input type="checkbox" name="option" id="Back"> Back-End </p> <p> <button type="button" class="check-Front"> Subscribe Front-End </button> <button type="button" class="check-Back"> Subscribe Back-End </button> <button type="button" class="reset"> Reset </button> </p> <script type="text/javascript"> $(document).ready(function() { $(".check-Front").click(function() { $("#Front").attr("checked", true); }); $(".check-Back").click(function() { $("#Back").attr("checked", true); }); $(".reset").click(function() { $("#Front").attr("checked", false); $("#Back").attr("checked", false); }); }); </script> </center> </body> </html> |
Output:
- Before clicking any button:
- Clicking on the button:
- Clicking on the ‘Reset’ button:
jQuery is an open source JavaScript library that simplifies the interactions between an HTML/CSS document, It is widely famous with it’s philosophy of “Write less, do more”.
You can learn jQuery from the ground up by following this jQuery Tutorial and jQuery Examples.
