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In this tutorial, we are going to look at how we can return true if the parent element contains the child element in JavaScript. Assuming you have two HTML elements, a parent element, and a child element, and you want to know if the parent element contains the child element.Using the Node.contains() methodThe Node interface's contains() method returns a Boolean value, indicating whether a node is a descendant of a given node or not.If you want to know if the parent element contains the child element, you can use the Node.contains() method.Here's a simple example − Some text The ... Read More
In asynchronous JavaScript, there are two ways to schedule tasks – microtask queue and callback queue. Both queues are handled differently by the JavaScript engine.Microtask QueueA Microtask queue is a queue of tasks that are executed after the current task. The microtask queue is handled by the JavaScript engine before it moves on to the next task in the callback queue.ExampleHere’s an example of how microtask queue works − Examples console.log('start'); setTimeout(function() { console.log('setTimeout'); }, 0); ... Read More
In JavaScript, there are various ways to remove elements from an array until the passed function returns true. In this tutorial, we are going to look at 3 methods in detail.Using Array.prototype.filter()The Array.prototype.filter() method can be used to remove elements from an array until the passed function returns true. Please refer to the Array filter() method for more details.Example 1The following code shows how to use this method − Examples var arr = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10]; function ... Read More
In this tutorial, we are going to learn how to set the width of stroke of a Rectangle using FabricJS. Rectangle is one of the various shapes provided by FabricJS. In order to create a rectangle, we will have to create an instance of fabric.Rect class and add it to the canvas.The strokeWidth property allows us to specify the width of a stroke for an object.Syntaxnew fabric.Rect( { strokeWidth: Number }: Object)ParametersOptions (optional) − This parameter is an Object which provides additional customizations to our rectangle. Using this parameter, properties such as colour, cursor, stroke width and a lot of ... Read More
In this tutorial, we are going to learn how to set the vertical scale factor of a Rectangle using FabricJS. Rectangle is one of the various shapes provided by FabricJS. In order to create a rectangle, we will have to create an instance of fabric.Rect class and add it to the canvas.Just as we can specify the position, colour, opacity and dimension of a rectangle object in the canvas, we can also set the vertical scale of a rectangle object. This can be done by using the scaleY property.Syntaxnew fabric.Rect({ scaleY : Number }: Object)ParametersOptions (optional) − This parameter is ... Read More
In this tutorial, we are going to learn how to set the style of controlling corners of Rectangle using FabricJS. Rectangle is one of the various shapes provided by FabricJS. In order to create a rectangle, we will have to create an instance of fabric.Rect class and add it to the canvas.The controlling corners of an object allow us to scale, stretch or change its position. We can customize our controlling corners in many ways such as adding a specific colour to it, changing its size etc. We can change the style by using the cornerStyle property.Syntaxnew fabric.Rect({ cornerStyle: String ... Read More
In this tutorial, we are going to learn how to set the size of the controlling corners of a Rectangle using FabricJS. The controlling corners of an object allow us to scale, stretch or change its position.We can customize our controlling corners in many ways such as adding a specific colour to it, changing its size etc. We can change the size by using the cornerSize property.Syntaxnew fabric.Rect({ cornerSize: Number }: Object)ParametersOptions (optional) − This parameter is an Object which provides additional customizations to our rectangle. Using this parameter, properties such as colour, cursor, stroke width, and a lot of ... Read More
In this tutorial, we are going to set the position of Rectangle using FabricJS. The top property allows us to manipulate the position of the object. By default, the top position is relative to the object’s top.Syntaxnew fabric.Rect({ top: Number }: Object)ParametersOptions (optional) − This parameter is an Object which provides additional customizations to our rectangle. Using this parameter, properties such as colour, cursor, stroke width, and a lot of other properties can be changed related to the object of which the top is a property.Options keystop − This property accepts a Number which allows us to set the top ... Read More
In this tutorial, we are going to learn how to set the padding of a Rectangle using FabricJS. Rectangle is one of the various shapes provided by FabricJS. In order to create a rectangle, we will have to create an instance of fabric.Rect class and add it to the canvas.Just as we can specify the position, colour, opacity and dimension of a rectangle object in the canvas, we can also set the padding of a rectangle object. This can be done by using the padding property.Syntaxnew fabric.Rect({ padding : Number }: Object)ParametersOptions (optional) − This parameter is an Object which ... Read More
In this tutorial, we are going to learn how to set the opacity of Rectangle using FabricJS. Rectangle is one of the various shapes provided by FabricJS. In order to create a rectangle, we will have to create an instance of fabric.Rect class and add it to the canvas.We can customize a rectangle object by adding a fill colour to it, eliminate its borders or even make changes in its dimensions. Similarly, we can also change its opacity by using the opacity property.Syntaxnew fabric.Rect({ opacity: Number }: Object)ParametersOptions (optional) − This parameter is an Object which provides additional customizations to ... Read More