In JavaScript, "==" and "===" are comparison operators used to compare values or variables. The main difference between them is that "==" (double equals) checks for equality of values, whereas "===" (triple equals) checks for both equality of values and types. When using "==" to ...
What is the difference between == and === in JavaScript?Craig Buckler
first one says: hey, A equals B (Just value, no matter if A is a string and B is a number) and the second says: hey, A equals B (considering both value and type of data). That's what i think, i'm a JavaScript newbie. === "Authenticate yourself!" -> Identify yourself...
In JavaScript, null and undefined are two special values that indicate the absence of a value. Although they are often used interchangeably, there is a subtle difference between them. What is undefined in JavaScript? undefined is a value automatically assigned to variables that have not been init...
null and undefined are JavaScript primitive types.The meaning of undefined is to say that a variable has declared, but it has no value assigned.let age //age is undefinedlet age = null //age is nullNote: accessing a variable that’s not been declared will raise a ReferenceError: <...
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So, what is the difference between a normal function and an arrow function? 🤔️ 1. this points to In JavaScript, thethisis a basic and important knowledge point. 1.1 Ordinary functions In ordinary functions,thisis dynamic, and its value depends on how the function is called. There are...
What's the difference between using “let” and “var”? ECMAScript 6 introduced the let statement. I've heard that it's described as a local variable, but I'm still not quite sure how it behaves differently than the var keyword. What are the differences?. When should let be used ...
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The difference between JavaScript and jQuery is that JavaScript is a programming language while jQuery is a JavaScript library. Libraries, but jQuery more specifically, provides additional functionalities in order to simplify CSS animations, Document Object Model (DOM) manipulation, amongst others. Upvote...