Add element before element javascript

Add Element Before Element in JavaScript: A Complete Guide with Examples

Learn how to add an element before another element in JavaScript with insertBefore(), Element.before(), Element.prepend(), Node.insertBefore(), and JavaScript before() method. Get real-life examples and step-by-step instructions. Start adding elements now!

• The insertBefore() Method
• Other Methods to Add Element Before Another Element
• Node.insertBefore (Insert Before) Method
• The insertAdjacentElement() and Element.insertAdjacentHTML() Methods
• Adding an Element Before a Div in JavaScript
• Using appendChild() Method to Add a New Element as the First Child to the Parent Element
• Other simple code examples for adding an element before another element in JavaScript
• Conclusion
• How to insert an element before an element in JavaScript?
• How to insert before a div in JavaScript?
• How to add an element after an element in JavaScript?
• How to add a new element as first child to the parent element in JavaScript?

JavaScript is a popular programming language that is widely used in web development. One of the common tasks in web development is adding an element before another element in the DOM. In this article, we will discuss the different methods to add an element before another element in JavaScript with detailed explanations and real-life examples.

The insertBefore() Method

The insertBefore() method is one of the most commonly used methods to add an element before another element in JavaScript. This method is used to insert an element before another HTML element in the DOM.

The syntax for using the insertBefore() method is as follows:

parentNode.insertBefore(newNode, referenceNode); 

Here, parentNode is the parent node of the element you want to insert, newNode is the element you want to insert, and referenceNode is the element before which you want to insert the new element.

Let’s take a look at an example:

document.getElementById("parentDiv").insertBefore(newElement, referenceElement); 

In this example, the element with the ID parentDiv is the parent node, newElement is the element you want to insert, and referenceElement is the element before which you want to insert the new element.

Other Methods to Add Element Before Another Element

Apart from the insertBefore() method, there are other methods that can be used to add an element before another element in JavaScript. Here are some of the commonly used methods:

Element.before() Method

The Element.before() method is used to insert a set of Node or string objects in the children list of this Element’s parent, just before this Element. This method can be used to insert multiple elements at once.

The syntax for using the Element.before() method is as follows:

Here, element is the element before which you want to insert the new element, and content is the content you want to insert.

Element.prepend() Method

The Element.prepend() method is used to insert a set of Node or string objects into the children list of this parent Element, just inside this Element. This method can be used to insert multiple elements at once.

The syntax for using the Element.prepend() method is as follows:

Here, element is the element inside which you want to insert the new element, and content is the content you want to insert.

Node.insertBefore() Method

The Node.insertBefore() method is used to insert a node before a reference node as the parent node’s child. This method can be used to insert multiple elements at once.

The syntax for using the Node.insertBefore() method is as follows:

parentNode.insertBefore(newNode, referenceNode); 

Here, parentNode is the parent node of the element you want to insert, newNode is the element you want to insert, and referenceNode is the element before which you want to insert the new element.

JavaScript before() Method

The JavaScript before() method is used to insert a node before the Element in the DOM tree. This method can be used to insert multiple elements at once.

The syntax for using the JavaScript before() method is as follows:

Here, element is the element before which you want to insert the new element, and content is the content you want to insert.

Node.insertBefore (Insert Before) Method

The ‘insertBefore’ method in the Javascript DOM allows you to insert a new node onto an Duration: 7:00

The insertAdjacentElement() and Element.insertAdjacentHTML() Methods

Apart from the above methods, there are two other methods that can be used to insert new elements before or after existing elements.

The insertAdjacentElement() Method

The insertAdjacentElement() method can be used to insert new elements before or after existing elements. This method takes two parameters: the position where you want to insert the new element and the new element you want to insert.

The syntax for using the insertAdjacentElement() method is as follows:

element.insertAdjacentElement(position, element); 

Here, element is the element before or after which you want to insert the new element, and position is the position where you want to insert the new element. The available positions are “beforebegin”, “afterbegin”, “beforeend”, and “afterend”.

Let’s take a look at an example:

document.getElementById("element").insertAdjacentElement("beforebegin", newElement); 

In this example, the element with the ID element is the element before or after which you want to insert the new element, and newElement is the new element you want to insert.

The Element.insertAdjacentHTML() Method

The Element.insertAdjacentHTML() method can be used to insert a string of HTML code relative to the position of the current element in the DOM hierarchy. This method takes two parameters: the position where you want to insert the new element and the HTML code you want to insert.

The syntax for using the Element.insertAdjacentHTML() method is as follows:

element.insertAdjacentHTML(position, text); 

Here, element is the element before or after which you want to insert the new element, and position is the position where you want to insert the new element. The available positions are “beforebegin”, “afterbegin”, “beforeend”, and “afterend”.

Let’s take a look at an example:

document.getElementById("element").insertAdjacentHTML("beforebegin", "
New Element
"); 

In this example, the element with the ID element is the element before or after which you want to insert the new element, and

is the HTML code you want to insert.

Adding an Element Before a Div in JavaScript

To add an element before a div in JavaScript, you can use the getElementById() and createElement() methods along with the insertBefore() method.

var newElement = document.createElement("div"); document.getElementById("parentDiv").insertBefore(newElement, document.getElementById("referenceElement")); 

In this example, the newElement is the new element you want to insert, parentDiv is the parent element you want to insert the new element into, and referenceElement is the element before which you want to insert the new element.

Using appendChild() Method to Add a New Element as the First Child to the Parent Element

The appendChild() method can be used to add a new element as the first child to the parent element in JavaScript.

document.getElementById("parentDiv").appendChild(newElement); 

In this example, the parentDiv is the parent element you want to insert the new element into, and newElement is the new element you want to insert.

Other simple code examples for adding an element before another element in JavaScript

In Javascript , javascript add div before element code sample

var my_elem = document.getElementById('my_id');var span = document.createElement('span'); span.innerHTML = '*'; span.className = 'asterisk';my_elem.parentNode.insertBefore(span, my_elem);

In Javascript , javascript add element above code example

In Javascript , in particular, js insert before code sample

// create alert div const alert_box = document.createElement("div") alert_box.innerText = "Not allowed!"; alert_box.className = "alert";//get the parrent of where u wanna insert const cont = document.querySelector(".container"); // get the element you wanna insert before const prof = document.getElementById("profile"); // do the insert cont.insertBefore(alert_box, prof);

In Javascript , javascript insert before

function insertBefore(newNode, existingNode)

In Javascript case in point, js insertbefore

// The Node.insertBefore() method inserts a node before a // reference node as a child of a specified parent node. let insertedNode = parentNode.insertBefore(newNode, referenceNode)

In Javascript case in point, javascript insert html before element code example

// add without creating a new element document.getElementById('my_id') .insertAdjacentHTML('beforebegin', 'your_html_code');

Conclusion

Adding an element before another element in JavaScript can be done using various methods such as the insertBefore() method, Element.before(), Element.prepend(), Node.insertBefore(), and JavaScript before() method. The insertAdjacentElement() and Element.insertAdjacentHTML() methods can also be used to insert new elements before or after existing elements. To add an element before a div in JavaScript, you can use the getElementById() and createElement() methods along with the insertBefore() method. The appendChild() method can be used to add a new element as the first child to the parent element in JavaScript. By using these methods, you can easily add an element before another element in JavaScript.

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Insert an element before another DOM element with JavaScript

In JavaScript, you can use the insertBefore() method to insert an element before another HTML element in the DOM. This method adds an element right before an existing element in the document.

Let us say we have the following existing

element:

The goal is to add another

tag before the above element in the DOM. Here is an example that creates a new paragraph tag and then inserts it before the above

tag:

// create new element const elem = document.createElement('p') // add text elem.innerText = 'Personal Details' // grab target element reference const target = document.querySelector('#intro') // insert the element before target element target.parentNode.insertBefore(elem, target) 

The insertBefore() method is supported by all modern and old browsers, including Internet Explorer 6 and higher.

If you want to insert an HTML string before an element in the DOM, you should use the insertAdjacentHTML() method instead. This method parses the specified string as HTML and inserts the resulting elements into the DOM tree at a specified position. Here is an example:

// insert HTML string before target element target.insertAdjacentHTML('beforebegin', '
Personal Details
') 

Take a look at this MDN guide to learn more about the insertAdjacentHTML() method.

The insertBefore() method adds a new element before another element in the DOM. However, you need to call it on the parentNode of the target element. Fortunately, ES6 introduced a new method called before() to insert an element before another DOM element. You call the before() method on the target node directly and pass the new element as a parameter:

// insert the element before the target element target.before(elem) 

And that’s it. The before() is only supported by the latest versions of Chrome, Safari, Firefox, and Opera. However, you can use a polyfill to extend the support up to IE 9 and higher. Read Next: How to insert an element to the DOM in JavaScript ✌️ Like this article? Follow me on Twitter and LinkedIn. You can also subscribe to RSS Feed.

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