A callback, as the name suggests, is a function that is to executeafteranother function has finished executing. As we know, in JavaScript,functions are objects. Because of this, functions can take functions as arguments, and other functions can also return it. Functions that take the additiona...
What are the impacts of developing non-UI functions using TS instead of ETS on applications (memory, CPU, and HAP size)? How do I determine the caller of an application? How do I obtain the UIAbility name of the current page? How do I check whether an application is running in ...
What are the impacts of developing non-UI functions using TS instead of ETS on applications (memory, CPU, and HAP size)? How do I determine the caller of an application? How do I obtain the UIAbility name of the current page? How do I check whether an application is running in ...
In this example,createGreetingis the higher-order function, which accepts two arguments, the name and the callback function. We uselogGreetingas our callback function. When we execute thecreateGreetingfunction, notice that we arenot appendingparentheses tologGreetingwhen we pass it in as an argum...
The useCallback hook in React is an effective mechanism for enhancing component performance by caching functions. In React, functions defined within components are recreated during eachrendercycle, which can result in unnecessary re-renders of child components that depend on those functions. This can...
So there you have it: throttling and debounce functions in JS and React.But would you ever implement this yourself in real life?Sure! If you just needed simple functionality like this, you could absolutely manage your own debounce logic/helpers in your app. However, there’s no shame in ...
A function provided as an argument to another function is known as a callback function.The order in which JavaScript functions are called determines how they are executed, not the order that they are listed. When a function can call another function and the second (or another) function has ...
1. Callback Hell (Pyramid of Doom) Challenge:Callback functions are often nestled in asynchronous code, resulting in a structure referred to as "Callback Hell" or the "Pyramid of Doom." This may lead to difficulty in reading, comprehending, and maintaining code. ...
Keywords in JavaScript Keywords in JavaScript are a set of reserved words that cannot be used as names of functions, labels, or variables as they are already a part of the syntax of JavaScript. Each of the keywords has its own meaning. They are genera
Custom Hooks in ReactJS are JavaScript functions that start with the word "use" and allow you to extract and reuse stateful logic between components. They enable you to build and share functionality without repeating code. Custom Hooks leverage React’s built-in hooks like useState, useEffect, ...