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Front End Technology Articles
Page 220 of 652
JavaScript - Accept only numbers between 0 to 255 range?
JavaScript is a popular scripting language used to create interactive websites and applications. It has many powerful features that make it easy to use and extendable. This can be useful for validating user input on forms or other data-driven tasks where you want to ensure the user enters a value within a specific range. In this article, we will discuss how to accept only numbers between 0 and 255 range using JavaScript. The range function in JavaScript returns a list of all the integers after receiving the beginning and ending indexes. The difference between the lowest and ...
Read MoreDynamically replace data based on matched RegEx - JavaScript?
Regex (or Regular Expressions) is used to match patterns in strings of text. With JavaScript, you can use regex to dynamically replace data based on matched patterns. This article will explain how to use regex and JavaScript together to make dynamic replacements in your code. We'll cover the basics of regex syntax, regular expression objects, and methods for using them with JavaScript. JavaScript offers various data types to store various types of values. Because the JavaScript engine uses variables in a dynamic manner, it is not necessary to specify the type of a variable when using JavaScript. Here, the ...
Read MoreHow to compare two arrays when the key is a string - JavaScript
Comparing two arrays in JavaScript can be tricky when the key is a string. String comparisons are case-sensitive and require special handling to ensure proper results. Fortunately, there are several methods you can use to compare two arrays when the key is a string in JavaScript. In this article, we’ll discuss how to effectively compare two arrays with strings as keys using various approaches such as map(), Include(). Intersection() and Arrayfilter(). Strings in JavaScript are used to store and modify text. A string in JavaScript is defined as zero or more characters enclosed in quotations. Data that can ...
Read MoreHow to test if a parameter is provided to a function in JavaScript?
Testing if a parameter is provided to a function in JavaScript is an important part of writing effective code. It allows you to ensure that the arguments passed into your functions are valid and properly formatted for use within the function. In this article, we will discuss different methods for testing whether or not a parameter has been provided to a function in JavaScript. Let us understand, the term “Parameter”. A parameter is a named entity in a function definition that specifies an argument which the function can accept. It acts as a variable within the function and its value ...
Read MorePulling data from array into new independent variables JavaScript?
In JavaScript, there is a array method that allows you to easily extract data from an array and assign it to new independent variables. This can be useful when working with large datasets or when needing to access specific values within an array quickly. In this article, we will explore how to use the dot(.) notation, for pulling data from an array into new independent variables in JavaScript. Let us know, what is an Independent variable! An independent variable is a variable that stands alone and isn't influenced by any other variables. It can be manipulated or changed, and it ...
Read MoreHow to align block elements to the center?
The margin property in CSS can be used to centre a block element like a div horizontally. We can set the width of the element, so that, it prevents the container from stretching out. The block elements take the full space line which force other elements to take up the next line as the block elements have 100% of the container. Aligning the block elements to the center Any element that begins a new line on a web page is considered as a block-level element. For example, header tags, div, etc. These block elements take the full width of the ...
Read MoreEm vs Rem units in CSS?
You might have observed 2 options while setting the size of the elements using CSS properties, one an absolute unit and the other a relative unit. The absolute unit is identical and is fixed and its size can be set with cm, mm, px. On the other hand, relative unit is relative to something else which can be a parent element or any other element. In this tutorial, we are going to have a look at the comparison between the em and rem units in CSS. The Em unit The em unit makes it possible to change the size of ...
Read MoreI'm generating a list from an array. How can I know what element I'm clicking in JavaScript?
Multiple values can be kept in a single variable by using arrays. Compare that to a variable that only has room for one value. Each item in an array has a number associated with it that you may access by using, referred to as a numeric index. Arrays in JavaScript begin at index zero and can be changed using a variety of operations. The addEventListener()Method The addEventListener() is a method in JavaScript that allows an element to be assigned an event handler, which will execute when a specified event occurs. This can include things like mouse clicks, form submission, ...
Read MoreWhy does div display: table-row ignore margin?
You might have come across a situation when several div elements are together and are next to each other with the property as display: table-cell and there is no margin between them. If you want to set a margin between them, you will need to add margin by adding margin externally. In this article, we are going to have a look why does the display: table--row ignores margin and how can we add margin if we want to add it. How to add the margin to the table? You might be thinking if we add margin externally in the table-row ...
Read MoreDifference between Auto-fit vs Auto-fill property in CSS grid
A responsive webpage is a necessary key point which has to be always kept in mind while developing a website. The grid module enables the developer to design webpages easily without using a lot of positioning, as the id module provides a grid type layout system in which there are rows and columns. The auto-fill property The auto-fill property is used to fill the rows with possible columns, the column which is added will occupy the space and the other column will be empty. The auto-fill property is an important property of the CSS grid and is mostly used so ...
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