# 
#  Overview
The **`not()`** method is a JQuery function that is used to return elements that do not match a specified selector. The specified selector can be a `class`, `element`, or `id` selector. `not()` is the opposite of the `filter` method, and most times, selectors are used when you have to filter elements.

# 
## Syntax
```js
$(selector).not(selector-not-to-match)
```
## Parameters
* `selector`: The original element to select and then filter from with the `not()` method. For example, `selector` can be `p`, which selects all paragraph elements.
* `selector-not-to-match`: The selector you want to filter away. For example, this parameter can be `active` and select all paragraph elements that are not active.

## Return value
`not()` returns all elements that match `selector` but do not contain the `selector-not-to-match` parameter that is passed.

##
## Example 
In the example below, we create some list elements that either have `package` or `framework` as a class. We have two buttons that will remove some of these elements based on the filter.  When the `Remove Framework` button is clicked, `$("li").not(".package").remove();`, the list elements that do not have the `package` class are removed. When the `Remove Package` button is clicked, the list items without the `framework` class are removed.
 
 

<html>
<head>
  <script src="https://ajax.googleapis.com/ajax/libs/jquery/3.5.1/jquery.min.js"></script>
  <script>
    $(document).ready(function(){
      // function to remove frameworks
        $("#remF").click(function(){
          // select list elements that are not packages and remove them
          $("li").not(".package").remove();
        });
      
      // functon to remove Packages
        $("#remP").click(function(){
          // select list elements that are not frameworks and remove them
         $("li").not(".framework").remove();
        });
      });
  </script>
</head>

<body>
  <ul>
      <li class="framework">ReactJs</li>
      <li class="package">Mongoose</li>
      <li class="package">Nodemon</li>
      <li class="multer">Multer</li>
      <li class="framework">VueJs</li>
  </ul>
  <button id="remF">Remove Frameworks</button>
  <button id="remP">Remove Packages</button>
</body>

</html>

codemirror

# 
#  Overview
The **`not()`** method is a JQuery function that is used to return elements that do not match a specified selector. The specified selector can be a `class`, `element`, or `id` selector. `not()` is the opposite of the `filter` method, and most times, selectors are used when you have to filter elements.

# 
## Syntax
```js
$(selector).not(selector-not-to-match)
```
## Parameters
* `selector`: The original element to select and then filter from with the `not()` method. For example, `selector` can be `p`, which selects all paragraph elements.
* `selector-not-to-match`: The selector you want to filter away. For example, this parameter can be `active` and select all paragraph elements that are not active.

## Return value
`not()` returns all elements that match `selector` but do not contain the `selector-not-to-match` parameter that is passed.

##
## Example 
In the example below, we create some list elements that either have `package` or `framework` as a class. We have two buttons that will remove some of these elements based on the filter.  When the `Remove Framework` button is clicked, `＄("li").not(".package").remove();`, the list elements that do not have the `package` class are removed. When the `Remove Package` button is clicked, the list items without the `framework` class are removed.
 
 

What is the not() method in JQuery?

The not() method returns elements not matching a specified selector, acting opposite to the filter method.