Hey Folks! As you know, we are doing a JavaScript blog series. So I am attaching all the blogs you will need to read or at least have an understanding of to reach this point: What Is const and let in Javascript? JS Variables and Data Types JavaScript
JavaScript Copy Using const const c = 1; // c = 2; // Error: Assignment to a constant variable JavaScript Copy In modern methods, it is advisable to use let and const over var. Use let when the variable needs to be reassigned and use const when the variable should not be reassig...
JavaScript Copy //Can not re-assign value in const, It will throw TypeError : Assignment to constant variable.functionexampleConstTest(){consttestconst="Const Test";testconst="Updated Const value"console.log(testconst);}exampleConstTest();// TypeError: Assignment to constant variable. JavaScript ...
JavaScript const: Here, we are going to learn about the const in JavaScript, how to create a constant in JavaScript?
hello ="Hey JavaScript";console.log(hello); Run Code Code Snippet: consta =1;console.log(a); Output: Run Code Code Snippet: varnum; num =100;console.log(num); Output: Run Code What are var, let, and const in JavaScript? Var, let, and const are keywords that users use to declare...
Through this blog, we will dive into the concept of a callback function in JavaScript, along with its needs and examples. Moving forward, you will understand synchronous and asynchronous callback functions, their respective codes, and more. Let us explore the following topics: What is a Call...
How to Create a Promise in JavaScript? As we discussed above, A Promise in JavaScript is an object representing the eventual completion or failure of an asynchronous operation. Its syntax looks like below: Syntax: constpromise =newPromise(function(resolve,reject){//do something}); ...
In JavaScript, arrays are predefined objects, where the indexes are the arrays properties. They can hold a collection of values with differing data types. The array is a go-to data structure for common list related tasks.
What is QuaggaJS? QuaggaJS is a barcode-scanner entirely written in JavaScript supporting real-time localization and decoding of various types of barcodes such as EAN, CODE 128, CODE 39, EAN 8, UPC-A, UPC-C, I2of5, 2of5, CODE 93, CODE 32 and CODABAR. The library is also capable...
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