HTML events are “things” that happen to HTML elements. When JavaScript is used in HTML pages, JavaScript can “react” on these events. HTML Events An HTML event can be something the browser does, or something a user does. Here are some examples of HTML events: An HTML web page has finished loading An HTML input …
What is (this)? In JavaScript, the this keyword refers to an object. Which object depends on how this is being invoked (used or called). The this keyword refers to different objects depending on how it is used: In an object method, this refers to the object.Alone, this refers to the global object.In a function, this …
A JavaScript function is a block of code designed to perform a particular task. A JavaScript function is executed when “something” invokes it (calls it). Why Functions? You can reuse code: Define the code once, and use it many times.You can use the same code many times with different arguments, to produce different results. Sample1: …
JavaScript has 8 Datatypes 1. String2. Number3. Bigint4. Boolean5. Undefined6. Null7. Symbol8. Object The Object Datatype The object data type can contain: An object An array A date Note: A JavaScript variable can hold any type of data. NoteMost programming languages have many number types: Whole numbers (integers):byte (8-bit), short (16-bit), int (32-bit), long (64-bit) …
Types of JavaScript Operators There are different types of JavaScript operators: Arithmetic Operators Assignment Operators Comparison Operators Logical Operators Conditional Operators Type Operators Operation Table Line Operation Description 1 + Addition 2 – Subtraction 3 * Multiplication 4 ** Exponentiation (ES2016) 5 / Division 6 % Modulus (Division Remainder) 7 ++ Increment 8 — Decrement …
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