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In this tutorial, we will learn how to print all methods of an object in JavaScript. An object's property with a function declaration is known as a JavaScript method. Methods are represented as object attributes and functions. We refer to actions carried out on objects as JavaScript methods. It is also possible to call the objects without using parentheses. This is a reference to the method's owner object. The method manipulates data that is part of a Class. The Object that was called into a method is implicitly passed. A function connected to an object attribute is called a method. ... Read More
In this tutorial, let us discuss how to work with document.forms in JavaScript. The document.form property returns all the form tags in the document. The forms property is read-only. The form property is the Dom level 1 feature. Working with form attributes and elements Here let us learn to work with a form's properties, attributes, and elements. Users can follow the syntax below to work with the form's properties and elements. Syntax var forms = document.forms; let formLen = forms.length; let formId = forms[0].id || forms.item(0).id; let formItemId = forms[0].elements[0].id; let formItemVal = forms[0].elements[0].value; let formData = forms.namedItem("testForm").innerHTML; The ... Read More
In this tutorial, we will learn to work with document.documentElement property in JavaScript. JavaScript DOM is a JavaScript script that can dynamically read or change the webpage's content. There are numerous properties available in the JavaScript DOM. We can access, change and style every element on the webpage. The document is the property of dom that is the root of the HTML webpage. It again consists of its child properties. The documentElement is the child property of the document property in dom. It is used to get the root element of the document. It returns an object consisting of the ... Read More
In this tutorial, we will learn how to validate an email address using JavaScript. A computer network's electronic mailbox, often known as an email address, is used to send and receive messages. All email addresses have the same format as in the 1980s. The email validation process checks to see if an email address is deliverable and legitimate. It quickly executes an algorithm that detects different typos and also whether there are deliberate misdirection or innocent errors. It verifies like Gmail or Yahoo if a certain email address is registered with such reputable domain or not. This increases the effectiveness ... Read More
In this tutorial, we will learn to validate decimal numbers in JavaScript. A number containing decimal(.) is known as a decimal number. A number comes between the two whole numbers, called decimal numbers. We use decimal numbers in calculations, progress bars, to accept input in forms, etc. A regular expression is a well-known entity for validation purposes. A Regular expression is a search pattern of characters with a specific meaning used to validate the data. It can be used for any string or number. We are going to use it for validation purposes in JavaScript. We used a simple logic ... Read More
In this tutorial, let us discuss how to use the void keyword in JavaScript. We use the void keyword as the return type of function that does not return any value. It evaluates an expression and returns undefined. We can use this with a single operand because this is a unary operator. We should not wrap the expression in parentheses because void is not a function. void 0 is the same as void(0). Users can follow the syntax blocks to deal with each use case. Syntax void expression The expression can be a variable or a function. Use void ... Read More
In this tutorial, let us discuss the methods to use unlimited arguments in a JavaScript function. The number of arguments in a JavaScript function is a bit tricky. If we specify three arguments should follow the correct order of the arguments. Let us discover the solution to this problem by introducing the methods to pass unlimited in a function, we can not pass more than three. Moreover, we arguments to a JavaScript function. Using ES5 Arguments Object Instead of converting the arguments object to an array, we can process the arguments object with the total number of arguments. Follow the ... Read More
JavaScript object properties are the keys inside the body of a JavaScript object. Object properties can be any of the three primitive data types, or any of the abstract data types, such as another object. Object properties are usually variables used internally in the object's methods, but can also be globally visible variables that are used throughout the page. These properties can either be statically typed by the programmer at the time of object declaration, or they can be modified or created later according to the need. There are two ways of creating or adding properties to a JavaScript object ... Read More
In this tutorial, we will learn how to get the square root of a number in JavaScript in both ways. The square root of a number in JavaScript can be found in two ways − Using Math.sqrt() Method By creating a Custom Function The square root of a number is a factor that, when multiplied by itself, gives the original number. For example, 10 is the square root of 100 because if you multiply 10 by itself (10*10), the result will be 100. Using the Math.sqrt() Method In JavaScript, The Math.sqrt() method is useful for finding the square ... Read More
This tutorial will help you to find the arcsine in radians of a number in JavaScript. Sine is the ratio of the opposite side and hypotenuse of the right triangle they define. To get the sine of a number, the Math.sin() function is used in JavaScript. It returns a value between 1 and -1. This represents the sine of an angle. This will be in radians. The inverse of sine is called Arc sine. An angle's trigonometric Arc sine value can be calculated using asin() method. This returns a value between -π/2 and π/2. The input to asin() method is ... Read More