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This article mainly introduces how to add, edit, delete JavaScript operation related knowledge, the content is easy to understand, the operation is simple and fast, with a certain reference value, I believe you read this JavaScript how to add, edit, delete the operation of the article will have a harvest, let's take a look.

The details are as follows:

CreateElement,createTextNode,appendChild,insertBefore,removeChild,replaceChild

CreateElement

The following code is used to create the

Elements:

Var para = document.createElement ("p"); createTextNode

For

Element to add a text node:

Var node = document.createTextNode ("this is a new paragraph.") ; appendChild (it is used to add new elements to the tail)

Add a text node to the

In the element:

Para.appendChild (node)

The above three combined cases:

This is a paragraph.

This is another paragraph.

Var para = document.createElement ("p"); / / create the p tag var node = document.createTextNode ("this is a new paragraph.") ; / add a text node para.appendChild (node); / / add a text node (content) var element = document.getElementById ("div1") to the p tag; element.appendChild (para); / / add to an existing element

Running result:

InsertBefore (new element added to the starting position) this is a paragraph.

This is another paragraph.

Var para = document.createElement ("p"); var node = document.createTextNode ("this is a new paragraph.") ; para.appendChild (node); var element = document.getElementById ("div1"); var child = document.getElementById ("p1"); element.insertBefore (para, child)

Running result:

RemoveChild

To remove an element, you need to know the parent of the element.

This is a paragraph.

This is another paragraph.

Var parent = document.getElementById ("div1"); var child = document.getElementById ("p1"); parent.removeChild (child)

Running result:

ReplaceChild

Use the replaceChild () method to replace elements in HTML DOM.

This is a paragraph.

This is another paragraph.

Var para = document.createElement ("p"); var node = document.createTextNode ("this is a new paragraph.") ; para.appendChild (node); var parent = document.getElementById ("div1"); var child = document.getElementById ("p1"); parent.replaceChild (para, child)

Running result:

This is the end of the article on "how to add, edit and delete JavaScript". Thank you for reading! I believe you all have a certain understanding of the knowledge of "how to add, edit and delete JavaScript". If you want to learn more, you are welcome to follow the industry information channel.

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