JavaScript provides various methods to remove an item from an array. In this article, we will explore the canonical approach as well as other options using plain JavaScript. Here are a few ways to remove an item from an array using JavaScript: By Index: If you know the index of the item you want to remove, you can use the slice() method to create a new array without mutating the original one....
If you come across a number with a leading zero, such as 010 or 02, and you need to eliminate that zero, there are several methods you can use in JavaScript. The most straightforward approach is to utilize the parseInt() function: parseInt(number, 10) By specifying the radix parameter as 10, you ensure consistent behavior across various browsers. Keep in mind that some JavaScript engines may function correctly without explicitly setting the radix, but it’s always advisable to include it....
Replacing a DOM element with another might be necessary in certain situations. If you have a DOM element and want to replace it with a different one, there are a couple of methods you can use. The first method is to use the replaceWith() method. This method is available on DOM elements and allows you to replace the element with another one. Here is an example: const el1 = document.querySelector(/* ....
Learn the proper way to replace all occurrences of a string in plain JavaScript, including using regular expressions and other approaches. Using a Regular Expression To replace all occurrences of a string with another string, you can use a regular expression. This simple regex, String.replace(/<TERM>/g, ''), will perform the task. Note that it is case sensitive. Here’s an example that demonstrates replacing all occurrences of the word “dog” in the string phrase:...
Replacing an item in an array in JavaScript is a common operation when working with arrays. This can be easily achieved using a simple assignment if you know the index of the item. Here’s an example: const items = ['a', 'b', 'c', 'd', 'e', 'f']; const i = 2; items[i] = '--NEW-ITEM--'; console.log(items); //[ 'a', 'b', '--NEW-ITEM--', 'd', 'e', 'f' ] In the code above, we have an array called items with multiple elements....
If you find yourself needing to process multiple URLs within a string using a regular expression in JavaScript, capturing groups can come in handy. They allow you to extract specific parts of the matched pattern. In this article, we’ll explore how to retrieve all results of a regular expression with capturing groups. Let’s start by examining how to get a single result using the match() method: const text = 'hello1 bla bla hello2'; const regex = /hello\d/; text....
Discover the different methods JavaScript offers to obtain the current URL that is open in the web browser. To retrieve the current URL of the opened page using JavaScript, you can utilize the location property provided by the browser on the window object. window.location As window is the global object in the browser, you can reference the property as location This property returns a Location object that contains various properties of its own:...
Learn how to retrieve the result of an asynchronous function, whether it is promise-based or callback-based, using JavaScript. Imagine you encounter this scenario: you need to return the result of an asynchronous call from the original function. Here is a simplified example: const mainFunction = () => { const result = asynchronousFunction(); return result; } However, asynchronousFunction() performs an asynchronous operation, such as a fetch() call, and cannot directly return the result value....
If you are looking to obtain the value of a CSS property in a web page that is set using a stylesheet, you may be wondering how to achieve this using JavaScript. The style property of an element will not suffice since it only returns CSS properties defined inline or dynamically, and not those defined in an external stylesheet. Thankfully, there is a solution: the getComputedStyle() function. This global function allows you to retrieve the computed style of an element, including properties defined in stylesheets....
Functions in JavaScript can only return a single value using the return statement. So, how can we simulate returning multiple values from a function? When we have the need to return multiple values, we can utilize a couple of tricks to achieve this. Option 1: Returning an Array One simple approach is to return an array from the function: const getDetails = () => { return [37, 'Flavio']; }; To access the returned values, we can use array destructuring:...