javascript delete picture

JavaScript Picture Deletion Tutorial

In web development, it is often necessary to delete pictures on the page. At this time, we can use JavaScript to implement this function. JavaScript is a scripting language commonly used in web development. It can make web pages more dynamic and interactive.

This article will introduce how to use JavaScript to delete images. The following will be explained according to the following method:

1. Get the picture element to be deleted
2. Delete the picture element

Get the picture element to be deleted

Before deleting a picture, you first need to obtain the picture element to be deleted. Generally, the img tag of HTML is used to define the picture.

For example:

<img id="myImage" src="example.jpg" alt="Example">

Through the above code, we define an image element named myImage, whose path is example.jpg.

We can use the document.getElementById method in JavaScript to get the element with the specified ID.

For example:

var image = document.getElementById('myImage');

In the above code, we define a variable named image, and use document.getElementById to get the element with the ID myImage.

Delete the picture element

After obtaining the picture element, we can delete it from the DOM tree. The DOM tree is a tree structure that describes an HTML page, and each node represents an HTML element.

You can use the removeChild method to remove elements from the DOM tree. For example:

image.parentNode.removeChild(image);

In the above code, we first use image.parentNode to get the parent node of the picture element, and then use the removeChild method to delete it. This completes the operation of deleting the picture.

Complete code example:

  
    
    
  
  
    <img id="myImage" src="example.jpg" alt="Example">
    Delete Image

    <script>
      function deleteImage() {
        var image = document.getElementById('myImage');
        image.parentNode.removeChild(image);
      }
    </script>
  

In the above code, we added a button to trigger the deletion of the image by clicking the button. At the same time, the deleteImage function is embedded in the button, which contains the above code.

Summary

This article describes how to use JavaScript to delete images on the page. Among them, we first obtain the image element through the document.getElementById method, and then delete the element from the DOM tree through the removeChild method. In this way, we can easily delete images on the web page, thus improving the interactivity of the page.

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