Category: JavaScript

https://stackoverflow.com/a/54562241 call and apply call a function while bind creates a function. Use .bind() when you want that function to later be called with a certain context, useful in events. Use .call() or .apply() when you want to invoke the function immediately, and modify the context. call() & apply()

Getting started OOP (Object-oriented programming) A programming paradigm centered around objects rather than functions 4 pillars Encapsulation Related variables and functions are combined into an objects variables => properties functions = > methods Abstraction Benefits: Simpler interface Reduce the impact of change Inheritance A way to eliminate redundant code Polymorphism Encapsulation Reduce complexity + increase […]

The typeof operator returns a string indicating the type of the unevaluated operand. https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/typeof

The console.log() method outputs a message to the web console. Syntax console.log(obj1 [, obj2, …, objN]);console.log(msg [, subst1, …, substN]); Output single value / object Note: what you get logged on the console is a reference to the object, which is not necessarily the ‘value’ of the object at the moment in time you call console.log(), but it is […]

There are two ways to know when an element gets visible / hidden in the screen during scrolling: Listening to the window scroll event Observing the element for visibility using Intersection Observer API Listening to the scroll Event Attach a scroll event handler to the window object, and use getBoundingClientRect() to calculate the position of […]

regular expression split() substr() https://stackoverflow.com/questions/18558417/get-first-word-of-string/18558427