Author: Editorial Team
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Event flow in JavaScript
1. Introduction Event flow in JavaScript refers to the sequence in which events are propagated through the DOM (Document Object Model) when an event is triggered. Understanding event flow is crucial for handling events efficiently in your web applications. 2. Phases of event flow Event flow consists of three distinct phases: The sequence of these…
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Managing Browser History with JavaScript
1. Introduction The History API provides access to the browser’s session history through the history global object. It exposes useful methods and properties that let you navigate back and forth through the user’s history, and manipulate the contents of the history stack. Note that the History API is only available on the main thread (Window).…
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What is the difference between window and document?
In JavaScript, window and document are both objects that provide access to different parts of the browser’s functionality. Here’s a detailed explanation of their differences: window object document object Summary of Differences Feature window document Represents Browser window/tab Web page content (DOM) Scope Top-level object Part of the window object Usage General browser-related actions DOM…
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delete operator in JavaScript
1. Introduction The delete operator removes a property from an object. If the property’s value is an object and there are no more references to the object, the object held by that property is eventually released automatically. Because classes are automatically in strict mode, and private properties can only be legally referenced in class bodies,…
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Data storage and eviction in browsers
1. Introduction Web developers can use a number of technologies to store data in the user’s browser(i.e, on the local disk of the device the user is using to view the website). The amount of data that browsers allow websites to store, as well as the methods they use to handle data deletion when storage…
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What is Memoization?
1. Overview Memoization is a technique to store the results of expensive function calls and reuse those results when the same inputs occur again. It avoids redundant calculations, making programs faster and more efficient. Memoization is particularly useful in scenarios involving: 2. How does Memoization work? Memoization works by following these steps: This technique ensures…
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How do you decode or encode a URL in JavaScript?
In JavaScript, you can use the encodeURIComponent, encodeURI, decodeURIComponent, and decodeURI functions to encode or decode URLs or their components. 1. Encoding a URL Use encodeURI or encodeURIComponent to encode URLs or parts of them. 2. Decoding a URL Use decodeURI or decodeURIComponent to decode previously encoded URLs or components. 3. Key Differences Between encodeURI…
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How do you redeclare variables in a switch block without an error
If you try to redeclare variables in a switch block then it will cause errors because there is only one block. For example, the below code block throws a syntax error as below, To avoid this error, you can create a nested block inside a case clause and create a new block scoped lexical environment.
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Pure Function in JavaScript
1. Introduction A pure function is a function that adheres to two key principles: Pure functions are a foundational concept in functional programming and are widely appreciated for their simplicity, predictability, and testability. 2. Key Characteristics of Pure Functions 3. Examples of Pure Functions Pure Function: Addition It always returns the same result for the…
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Currying in JavaScript
1. Introduction Currying is a functional programming technique where a function that takes multiple arguments is transformed into a series of functions, each taking a single argument. This allows you to apply arguments to a function one at a time. In JavaScript, currying allows you to partially apply a function. In simple terms, you can…