Selecting And Manipulating Elements In JS

Hello everyone, welcome to nkcoderz.com. In this article we will going to discuss about Selecting And Manipulating Elements In JS.

Selecting And Manipulating Elements In JS

Selecting and manipulating elements in JavaScript is an essential part of working with the DOM. The DOM provides several methods to select elements, and once an element is selected, it can be manipulated in various ways.

One of the most basic ways to select an element is by using the getElementById method. This method takes an id attribute as a parameter and returns the first element with a matching id. For example, the following code will select the element with the id “my-element”:

let myElement = document.getElementById("my-element");

Another popular method for selecting elements is the querySelector method. This method takes a CSS selector as a parameter and returns the first element that matches the selector. For example, the following code will select the first element with the class “my-class”:

let myElement = document.querySelector(".my-class");

The querySelectorAll method works similarly to querySelector, but it returns a NodeList of all elements that match the selector. This method can be used to select multiple elements at once.

Once an element is selected, it can be manipulated in various ways. The most basic way to manipulate an element is by changing its content, which can be done using the innerHTML property. For example, the following code will change the content of the selected element:

myElement.innerHTML = "New Content";

The style property can be used to change the element’s CSS styles. For example, the following code will change the color of the selected element:

myElement.style.color = "red";

It’s also possible to add and remove classes from an element using the classList property. For example, the following code will add the class “new-class” to the selected element:

myElement.classList.add("new-class");

It’s also possible to add, remove, and modify attributes on an element using the setAttribute and getAttribute methods.

It’s worth noting that manipulating the DOM can be a performance-intensive task and care should be taken to minimize the number of times the DOM is updated in a single execution cycle.

Another way to select elements is by using the getElementsByTagName method. This method takes a tag name as a parameter and returns a HTMLCollection of all elements with a matching tag name. For example, the following code will select all p elements in the document:

let myElements = document.getElementsByTagName("p");

It’s worth noting that the getElementsByTagName method returns a live HTMLCollection, which means that it updates automatically when the DOM changes.

Another way to select elements is by using the getElementsByClassName method. This method takes a class name as a parameter and returns a HTMLCollection of all elements with a matching class name. For example, the following code will select all elements with the class “my-class”:

let myElements = document.getElementsByClassName("my-class");

In addition to selecting elements, it’s also possible to manipulate the element’s parent and child nodes. For example, the appendChild method can be used to add a new element as a child of the selected element:

let newElement = document.createElement("div");
myElement.appendChild(newElement);

Similarly, the removeChild method can be used to remove a child element from the selected element:

myElement.removeChild(newElement);

The parentNode property can be used to access the parent element of the selected element:

let parentElement = myElement.parentNode;

There are also many other methods and properties available to manipulate elements, such as the textContent, value, and disabled properties, and the setAttribute and removeAttribute methods.

It’s also worth noting that there are several popular libraries such as jQuery, Mootools and Prototype, that provide a more convenient and efficient way to select and manipulate elements in the DOM.

Conclusion

In conclusion, selecting and manipulating elements in JavaScript is a fundamental part of working with the DOM. There are several ways to select elements, including getElementById, querySelector, and getElementsByTagName, and once an element is selected, it can be manipulated in various ways using properties and methods.


If You Like This Page Then Make Sure To Follow Us on Facebook, G News and Subscribe Our YouTube Channel. We will provide you updates daily.
Shares
facebook sharing button Share
twitter sharing button Tweet
whatsapp sharing button Share
telegram sharing button Share
pinterest sharing button Pin

Leave a Comment