How to Install LAMP (Linux, Apache, MySql & PHP) on AWS EC2 with Ubuntu 20.04
In this article step-by-step process is discussed to setup LAMP stack in AWS EC2, with Ubuntu 20.04 as the operating system.
How to Check If a Javascript Function Was Called Using new Operator
The property can be used to detect whether a function was invoked as a constructor using the new operator, or just called normally.
Vertical Text, with Horizontal Letters in CSS
Creating a vertical direction text with horizontal characters can be achieved using text-orientation & writing-mode CSS properties.
File Uploading Progress in Javascript Fetch
Currently it is not possible to get file upload progress for fetch. The alternate solution for now is to use XMLHttpRequest.
How to Check If Element is Visible / Hidden in Page using Intersection Observer
Checking whether an element is visible or hidden in the full page, even through it may not be in screen view, can be done through an Intersection Observer. The trick is to set the root element to document.documentElement.
How to Detect Change in Element Size with Javascript
Detecting an element for change in dimensions using JS can be done with the ResizeObserver interface. This is supported in all modern browsers.
Detecting Dark Mode with Javascript
Device dark mode can be checked in Javascript by using window.matchMedia() to check a match for the prefers-color-scheme: dark CSS media query.
How to Position Element to Bottom of Its Container with CSS Flex
A multi-row layout where the last DIV needs to be placed at bottom of its parent container can be created using CSS flex, by setting margin-top as auto for the last element.
Getting Property Value in a Deeply Nested Object (using ES2020 Optional Chaining Operator)
Property value in a deeply nested Javascript object can be found using the Optional Chaining Operator, introduced in ES2020.
How to Create LEFT-RIGHT Alignment of Containers with CSS Flex
A two-column layout, where the first item is aligned to the left, and the second item is aligned to the extreme right, can be created using justify-content CSS flex property.
Handling Error HTTP Responses in Javascript fetch
Failed HTTP responses can be handled in fetch() by checking whether the returned Promise was rejected due to a network error. Subsequently the Response.ok property needs to be checked for an invalid HTTP status code.
Creating a Slider / Carousel with CSS Flexbox (with infinite repeating items in loop)
A responsive slider / carousel can be created with CSS flexbox using the order property. Items can be repeated infinitely in a circular loop by changing the order property each time.
Reading a Text File from Server using JavaScript
A text file on a server can be read with Javascript by downloading the file with Fetch / XHR and reading the response as text.
How to Align Column DIVs as Left-Center-Right with CSS Flex
A three-column layout where items are aligned to left, center and right can be created with CSS flex, and using justify-content property.
Javascript File Upload With fetch, async & await
Javascript fetch method can be used to upload files to server. fetch is Promise-based, so we can use async / await to write synchronous styled functions.
Creating a Responsive Logo with CSS min() Function (No Media Query Involved)
A responsive logo can be achieved in a HTML page using the CSS min() function, without involving any media query.
Checking If CSS Property Supported in Current Browser with Javascript
With newer CSS properties not available in all browsers, it is sometimes required to check whether a CSS property & its value are supported in the current browser. This can be detected in Javascript using the CSS.supports() method.
Maintain Image Quality When Applying CSS Transform & Scale
While applying CSS transform on an image, and scaling it, a common problem comes up that the image becomes blurred. This can be largely improved using the CSS image-rendering property.
Get Random Numbers, Cryptographically Secure, in Javascript
Random numbers that are cryptographically strong, can be generated in Javascript using the Web Crypto API.
Get Date and Time for a Given Timezone in Node.js
The toLocaleString() method of the Date() object can be used to get date and time for a given IANA timezone name in Node.