Difference between =, ==, and === in JavaScript This guide clarifies the differences among =, == and === in JavaScript, with examples to demonstrate each operator. = (Assignment Operator): The = operator assigns a value to a variable. For instance, x = 5 assigns the value 5 to x....
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
Possible Duplicates: Difference between == and === in JavaScript Javascript === vs == : Does it matter which “equal” operator I use? What's the difference between==and===? Also between!==and!==? There are lots of answers to this question on Stackoverflow already. Short: ==only c...
It is quite common to confuse null and undefined, but there is an important difference between them. null Simply put, null is a JavaScript keyword that indicates the absence of a value. Surprisingly, if you run the following in your firebug console: console.log( typeof null ), you will ...
In the world of JavaScript, there are lots of ways to manipulate strings as JS provides many methods to do so. Two of those methods are substr() and substring(). At first glance, they might seem identical - both are used to extract parts of a string. However, they have subtle differe...
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, both the substr() and substring() methods are used to extract substrings from a given string. However, they differ in how they operate and handle certain scenarios: substr() Method The substr() method extracts a portion of a string based on the starting index and a ...
Learn the key differences between static and const in JavaScript, including their definitions, use cases, and examples to enhance your coding skills.
Originally published in the A Drip of JavaScript newsletter. One of the unintuitive things about JavaScript is the fact that there are constructors for each of the primitive value types (boolean, string, etc), but what they construct isn't actually the same thing as the primitive....