jquery delete received value

In front-end development, it is often necessary to delete or modify data entered by the user. jQuery is a popular JavaScript library that provides many convenient methods for manipulating HTML and CSS elements. In this article, we will learn how to delete received values ​​using jQuery.

1. Use the .val() method to get the value of the input box

Before using jQuery to delete, we need to get the value of the input box. You can use the .val() method to get the value from the input box. For example:

var inputValue = $('#inputBox').val();

In the above code, $ represents the jQuery library, and #inputBox represents the input box with the id attribute inputBox in HTML. The val() method assigns the value of the input box to the inputValue variable.

2. Use the .replace() method to delete the specified string

Once we get the value in the input box, we can use the replace() method to delete the specific string . For example, assuming we want to remove all spaces in the input box, we can use the following code:

inputValue = inputValue.replace(/s+/g, '');

In the above code, /s /g is a regular expression that can match all spaces in the input box value. g stands for global search and replace.

Thereplace() method replaces all matching spaces with empty strings. Now, the inputValue variable will no longer contain any space characters.

3. Use the $.trim() method to remove spaces on both sides of the string

If we only want to remove space characters before or after the input box value, we can use $.trim() method. For example, the following code will remove leading and trailing spaces in the input box value:

inputValue = $.trim(inputValue);

In the above code, the $.trim() method will enter the input box value and remove the space characters on both sides. Now, the inputValue variable will contain only non-space characters.

4. Delete the content of an HTML element

jQuery also provides a way to delete the content of a specific HTML element. For example, if we want to delete the content in the div element with the id of output, we can use the following code:

$('#output').empty();

empty() method will delete all child elements of the specified element and their text content.

5. Apply the delete action to the button click event

Finally, we can apply the delete action to the actual button click event. For example, the following code will delete all spaces in the input box when the button is clicked:

<input type="text" id="inputBox" value=" This is a sample input. " />
<button id="deleteButton">Delete Spaces</button>

<script>
  $('#deleteButton').click(function() {
    var inputValue = $('#inputBox').val();
    inputValue = inputValue.replace(/s+/g, '');
    $('#inputBox').val(inputValue);
  });
</script>

In the above code, the code in the click() method will be executed when the button is clicked. The code takes the value from the input box and removes all spaces and injects it back into the input box using the .val() method.

Summary:

In this article, we learned how to delete a received value using jQuery. We learned how to remove spaces from strings using the .replace() method and $.trim() method, and remove content from HTML elements using the .empty() method. Finally, we apply the delete action to the button click event to demonstrate how these actions fit together. Hopefully this article helped you better understand how to delete a received value using jQuery.

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