Category: 5. JavaScript Objects

The JavaScript math object provides properties and methods for mathematical constants and functions. Unlike other global objects, Math is not a constructor. All the properties and methods of Math are static and can be called by using Math as an object without creating it. Thus, you refer to the constant pi as Math.PI and you call the sine function as Math.sin(x), where…

The JavaScript Proxy Handlers are used to define custom behavior for fundamental operations performed on objects. By defining handlers, you can override the default behavior of fundamental operations. Following are the common proxy handler methods: apply(), construct(), get(), has(), etc. JavaScript Handlers Following are the methods of JavaScript Handler − Sr.No. Name & Description 1 apply()Allows you…

TheDataViewis an object in JavaScript that allows you to work with the binary data stored in theArrayBuffer. It provides a low-level interface for reading and writing number types in a binary ArrayBuffer. The DataView object provides built-in methods for reading and writing 1, 2, and 4-byte signed and unsigned integers, as well as 4 and…

The Date object is a datatype built into the JavaScript language. Date objects are created with the new Date( ) as shown below. Once a Date object is created, a number of methods allow you to operate on it. Most methods simply allow you to get and set the year, month, day, hour, minute, second, and millisecond…

The JavaScript Array object lets you store multiple values in a single variable. An array is used to store a sequential collection of multiple elements of same or different data types. In JavaScript, arrays are dynamic, so you dont need to specify the length of the array while defining the array. The size of a JavaScript array…

The String object in JavaScript lets you work with a series of characters; it wraps JavaScript’s string primitive data type with a number of helper methods. As JavaScript automatically converts between string primitives and String objects, you can call any of the helper methods of the String object on a string primitive. The string is a sequence…

The JavaScript Boolean object represents two values, either “true” or “false”. You can create a boolean object using the Boolean() constructor with a ‘new’ keyword. It takes a value as parameter and returns a boolean object. If value parameter is omitted or is 0, -0, null, false, NaN, undefined, or the empty string (“”), the object has…

The JavaScript Number object represents numerical data as floating-point numbers. It contains different properties (constants) and methods for working on numbers. In general, you do not need to worry about Number objects because the browser automatically converts number literals to instances of the number class. A JavaScript Number object can be defined using the Number constructor. Other types of…