JQuery Input Value Add

JQuery is a popular JavaScript library that simplifies HTML DOM tree traversal and manipulation, event handling, animation, and AJAX. In this tutorial, we will learn how to add values to input fields using JQuery.

Add Value to Input Field

To add value to an input field, we can use the .val() method in JQuery. The .val() method sets or returns the value attribute of the selected elements. Here is an example:

$('#my-input').val('Hello, World!');

In the example above, we selected an input element with the ID my-input and set its value to Hello, World!. This will prepopulate the input field with the given value.

Append Value to Input Field

To append or add a value to an existing input field value, we can use the .val() method with a callback function. The callback function takes the old value as an argument and returns the new value. Here is an example:

$('#my-input').val(function(i, oldVal) {
  return oldVal + ', how are you?';
});

In the example above, we selected an input element with the ID my-input and appended a string , how are you? to its existing value. If the input field had the value Hello, World!, the new value would be Hello, World!, how are you?.

Conclusion

Adding values to input fields is a common task in web development. With JQuery, we can easily manipulate input fields using the .val() method. We can set or return the value attribute of an input element, or we can append a new value to the existing value using a callback function.