We would first need to access the post's comment section through the Facebook API. Then, we would use a loop to iterate through each comment and use the API to like each one. Finally, we would need to implement error handling in case any issues arise during the process. Approach If you want to use JavaScript to automatically like all comments on a Facebook post, here are some requirements you must meet − You would need to use the Facebook Graph API to first get all comments on a post. For each comment, you would need to call the ... Read More

We can apply multiple CSS classes to a single element by using the class attribute and separating each class with a space. There are two ways to apply two CSS classes to a single element − Apply two Classes Using the Class Attribute The class attribute that is used to set a single class can also be used to set multiple classes − This element has two CSS classes applied to it Example Let us see the example − Multiple Classes .one { color: red; ... Read More

We can append new information to errors by creating a new error object with the original error as its prototype and adding additional properties. This allows us to maintain the original error message while also providing additional context. JavaScript Functions In JavaScript, a function is a block of code that is executed when it is invoked. Functions are declared with the function keyword. Functions can take arguments. The arguments are the values that are passed to the function when it is invoked. Functions can return values. The value that is returned by the function is the value that is assigned ... Read More

To append HTML code to a div using JavaScript, we first need to select the div element. We can do this by using the document.getElementById() method and passing in the id of the div element. Next, we use the innerHTML property of the div element and set it equal to the HTML code we want to append, preceded by the += operator. Approach One approach to appending HTML code to a div using JavaScript would be to select the div using its id, Then use the innerHTML property to add the desired HTML code. For example − var div ... Read More

The price range selector allows us to select two values representing the range. Sometimes, we require to create a range slider to allow users to select a range. For example, we can allow users to select a minimum and maximum price using the price range selector. We can also show the products by filtering based on the selected minimum and maximum prices. In this tutorial, we will learn to create a price range selector using various libraries in ReactJS. Using the material UI to create a range selector The material UI provides various components we can import into the ... Read More

Nowadays, applications use a one-time password or magic link for authentication, but we can’t ignore the authentication using the username and password. Whenever we allow users to register with a username and password, we should ensure that the password users have entered is strong. So, it can be unbreakable by hackers. In this tutorial, we will learn to verify the security level of the password in ReactJS. Create a Custom Validation Algorithm We can create a custom validation algorithm to check if the password is strong or weak. We can create regular expressions for lowercase, uppercase, and numeric ... Read More

The HTML collection is an array of HTML elements. We can access every element of the collection using its index. Also, we can iterate through the array of HTML collections and get all HTML elements of the collection one by one. Sometimes, we require to use for loop to iterate through the collection of all HTML elements. For example, we have created a group of checkboxes, and when the user presses the clear button, we require to clear all checkboxes. We can access all checkboxes in the HTML collection, iterate through it, and uncheck every checkbox. In this tutorial, ... Read More

Sometimes, we require to uncheck a radio button using JavaScript or JQuery. For example, we use the radio button in the form. When the user presses the clear form button, we need to uncheck all radio buttons and allow again users to choose any option from the radio button. In this tutorial, we will learn various methods to uncheck single or multiple radio buttons using JQuery or JavaScript. Use the JavaScript to uncheck the radio button We can access the radio button in JavaScript using id, tag, name or other ways. After that, we can uncheck the radio ... Read More

While working with the data, removing the unnecessary white spaces from the string is necessary. So, we need to trim a string at the beginning or end. If we keep unnecessary white spaces in the data, it can cause some issues. For example, while storing the password, if we don’t trim the white space, it can mismatch when users try to log in another time to the app. In this tutorial, we will learn to trim a string at beginning or ending in JavaScript. Use the trimRight() method to trim the end of the string The trimRight() method ... Read More

We have given a string and need to convert it into a function in JavaScript. Sometimes, we get mathematical or function expressions in the form of the string, and executing that expression, requires converting strings into the function expression. In this tutorial, we will learn different approaches to converting the given string into a functional or mathematical expression. Use the eval() method The eval() method takes the expression as a parameter and evaluates the expression. For example, if we pass the ‘2 + 2’ string as a parameter of the eval() method, it returns 4 as it evaluates the ... Read More