Javascript Articles - Page 67 of 607

We can create a Polygon object by creating an instance of fabric.Polygon. A polygon object can be characterized by any closed shape consisting of a set of connected straight line segments. Since it is one of the basic elements of FabricJS, we can also easily customize it by applying properties like angle, opacity etc. In order to determine whether fill or stroke should be drawn first, we use the paintFirst property. Syntax new fabric.Polygon( points: Array, { paintFirst: String }: Object ) Parameters points − This parameter accepts an Array which denotes the array of points that ... Read More

We can create a Polygon object by creating an instance of fabric.Polygon. A polygon object can be characterized by any closed shape consisting of a set of connected straight-line segments. Since it is one of the basic elements of FabricJS, we can also easily customize it by applying properties like angle, opacity etc. We can check if the cache is dirty and the renderer is required by using the isCacheDirty method. This method checks whether the cache is dirty and thus lets FabricJS know that something in our canvas has changed which requires re-rendering. SyntaxisCacheDirty( skipCanvas: Boolean ) ... Read More

We can create a Polygon object by creating an instance of fabric.Polygon. A polygon object can be characterized by any closed shape consisting of a set of connected straight line segments. Since it is one of the basic elements of FabricJS, we can also easily customize it by applying properties like angle, opacity etc. We use the isContainedWithinObject to find whether a polygon object is fully contained within the area of another object. It can be used to test whether an object is fully contained within the area of another object. Syntax isContainedWithinObject(other: Object, absolute: Boolean, calculate: Boolean ... Read More

We can create a Polygon object by creating an instance of fabric.Polygon. A polygon object can be characterized by any closed shape consisting of a set of connected straight line segments. Since it is one of the basic elements of FabricJS, we can also easily customize it by applying properties like angle, opacity etc. In order to convert a polygon object into HTMLCanvasElement we use the toCanvasElement method. It returns the DOM element of type HTMLCanvasElement, an interface which inherits its properties and methods from the HTMLElement interface. We use the captureStream method to capture stream of Polygon converted to ... Read More

Promise.allSettled() is a method that takes an iterable of promises as an argument and returns a promise that is fulfilled when all of the promises in the iterable have been settled, meaning that they have either been fulfilled or rejected. When the returned promise is fulfilled, it is resolved with an array of objects containing information about the fulfilled or rejected promises. Each object has a status property, either fulfilled or rejected, and a value or reason property, respectively. For example, if you have an array of promises that represent network requests and want to know each request's status (whether ... Read More

Simple operations like adding two numbers or string manipulation codes execute sequentially in JavaScript and return the results instantly. But while coding for real−world applications, we frequently make time−taking calls to databases, APIs, and other applications. These longer calls don’t return the results instantly; they will rather return a promise. A promise is an object to represent the future results of an asynchronous operation. It is used to handle asynchronous processes' eventual success or failure. For instance, if you request some object from an API in JavaScript, you will be given a promise that the task will eventually be complete ... Read More

We will learn about the Promise.race() method in this tutorial. As the name of the race() method suggests, promises passed as a parameter of the race() method do the race to execute. So, Whichever promise will be resolved first, will be executed only by the race() method, and other promises will never be executed. Promise.race() The Promise.race method in JavaScript allows you to wait for the first of a set of promises to be fulfilled or rejected, and to handle the result or error that occurs. It returns a promise that is fulfilled or rejected as soon as one of ... Read More

We will learn about any() method of the promise in this tutorial. In JavaScript, we can use the promises to handle the asynchronous request. Writing the asynchronous code in our application to fetch the data makes it faster as it executes the other code without waiting for the data. Promise.any() Method As the name of any() method suggests, it will execute any promise fulfilled. So, whichever promise will resolve first, will be executed by the promise.any() method and others may or may not be executed. Also, all rejected promises were never executed by the promise.any() method. SyntaxUsers can follow the ... Read More

We can show the popup message to the app users using the popup box. We will learn about the different types of JavaScript popup boxes in this tutorial. There are three different types of popup boxes available in JavaScript below. Alert box Confirm box Prompt box We will learn about all popup boxes one by one below. Alert Box We can show the alert box using the window.alert() method. It simply shows the message in the popup box. We can use the alert box when we need to give some message to the users. For example, when the ... Read More

The Passport is a node package, or library which we can install in any nodeJs project. The Passport provides the functionality for authentication in the app. Also, it provides different encryption strategies to encrypt user information, such as a password. For example, what if Facebook or Google employees could see the password of their users? It is against user privacy. So, in such cases, we can use the Passport, which encrypts the password and stores it in the database. We should know the decryption algorithm and secret key to decrypt the password. Also, the Passport allows us to establish the ... Read More