What is the method to delete node in js

The js methods for deleting nodes are: 1. The removeChild() method is used to remove the specified child node from the parent node. It requires two parameters. The first parameter is the child node to be deleted. The second parameter is the parent node; 2. The parentNode.removeChild() method can be called directly through the parent node to delete the child node; 3. The remove() method can directly delete the node without specifying the parent node; 4. innerHTML attribute , used to delete the contents of the node.

#The JS method of deleting nodes is implemented by operating the DOM (Document Object Model). DOM is an object representation of HTML documents, which allows developers to manipulate and modify the content, structure and style of HTML documents through JavaScript.

In JS, there are many ways to delete nodes. Here are some commonly used methods.

1. removeChild() method:

The removeChild() method is used to remove the specified child node from the parent node. It takes two parameters, the first parameter is the child node to be deleted, and the second parameter is the parent node. The following is an example:

var parent = document.getElementById("parent"); var child = document.getElementById("child"); parent.removeChild(child);

2. parentNode.removeChild() method:

parentNode.removeChild() method is another form of removeChild() method, which can be passed directly to the parent node Called to delete child nodes. The following is an example:

var parent = document.getElementById("parent"); var child = document.getElementById("child"); parent.parentNode.removeChild(child);

3. remove() method: The

remove() method is a new method of DOM nodes, which can directly delete the node without specifying the parent node. Here is an example:

var element = document.getElementById("element"); element.remove();

4. innerHTML attribute:

The innerHTML attribute can be used to delete the content of the node. Set the innerHTML attribute to an empty string to clear the node's content. Here is an example:

var element = document.getElementById("element"); element.innerHTML = "";

It should be noted that the above method will only delete the node itself, but not the child nodes under the node. If you need to delete all child nodes under a node, you can use loop traversal to delete them one by one.

In addition, if you want to delete multiple nodes, you can use the querySelectorAll() method to obtain a list of nodes that meet the conditions, and then delete them one by one using loop traversal.

To summarize, JS methods for deleting nodes include removeChild(), parentNode.removeChild(), remove(), and innerHTML attributes. Developers can choose the appropriate method to delete nodes based on specific needs.

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