How to add a stroke to a triangle using FabricJS?
In this tutorial, we will learn how to add a stroke to a triangle using FabricJS. Triangle is one of the various shapes provided by FabricJS. In order to create a triangle, we must create an instance of the Fabric.Triangle class and add it to the canvas.
Our triangle object can be customized in many ways, such as changing its dimensions, adding a background color, or changing the color of the lines drawn around the object. We can do this by using the Stroke attribute.
Syntax
new fabric.Triangle({ stroke : String }: Object)Parameters
Options (optional) - This parameter is a Object< /em> Provides additional customization to our triangle. Using this parameter, you can change properties such as color, cursor, stroke width, and many other properties associated with the object for which Stroke is an attribute.
< /ul>Stroke - This property accepts a String to determine the object's border s color.
Options Keys
Example 1
Passing strokes as keys with hexadecimal values strong>
Let’s see A code example to see how triangle objects appear when using the lines property. Hexadecimal color codes begin with "#" followed by a six-digit number representing the color. In this case, we used "#3cb371", which is Mid-Sea Green.
<!DOCTYPE html>
<html>
<head>
<!-- Adding the Fabric JS Library-->
<script src="https://cdnjs.cloudflare.com/ajax/libs/fabric.js/510/fabric.min.js"></script>
</head>
<body>
<h2>Passing stroke as key with a hexadecimal value</h2>
<p>You can see that the stroke around the triangle is of medium sea-green colour</p>
<canvas id="canvas"></canvas>
<script>
// Initiate a canvas instance
var canvas = new fabric.Canvas("canvas");
canvas.setWidth(document.body.scrollWidth);
canvas.setHeight(250);
// Initiate a triangle object
var triangle = new fabric.Triangle({
left: 120,
top: 30,
width: 90,
height: 80,
fill: "#ecebbd",
stroke: "#3cb371",
strokeWidth: 7,
});
// Add it to the canvas
canvas.add(triangle);
</script>
</body>
</html>Example 2
Pass rgba value to StrokeAttribute
In this example we will see how Specify an rgba value for the stroke attribute. Instead of hexadecimal color codes we can use RGBA values which stand for: red, green, blue and alpha. The alpha parameter specifies the opacity of the color. In this example, we used the rgba value (46,139,87,0.8), which is a sea green with an opacity of 0.8.
<!DOCTYPE html>
<html>
<head>
<!-- Adding the Fabric JS Library-->
<script src="https://cdnjs.cloudflare.com/ajax/libs/fabric.js/510/fabric.min.js"></script>
</head>
<body>
<h2>Passing an rgba value to the stroke property</h2>
<p>You can see that the stroke colour is coming from the RGBA value now</p>
<canvas id="canvas"></canvas>
<script>
// Initiate a canvas instance
var canvas = new fabric.Canvas("canvas");
canvas.setWidth(document.body.scrollWidth);
canvas.setHeight(250);
// Initiate a triangle object
var triangle = new fabric.Triangle({
left: 120,
top: 30,
width: 90,
height: 80,
fill: "#ecebbd",
stroke: "rgba(46,139,87,0.8)",
strokeWidth: 7,
});
// Add it to the canvas
canvas.add(triangle);
</script>
</body>
</html>The above is the detailed content of How to add a stroke to a triangle using FabricJS?. For more information, please follow other related articles on the PHP Chinese website!
Hot AI Tools
Undresser.AI Undress
AI-powered app for creating realistic nude photos
AI Clothes Remover
Online AI tool for removing clothes from photos.
Undress AI Tool
Undress images for free
Clothoff.io
AI clothes remover
Video Face Swap
Swap faces in any video effortlessly with our completely free AI face swap tool!
Hot Article
Hot Tools
Notepad++7.3.1
Easy-to-use and free code editor
SublimeText3 Chinese version
Chinese version, very easy to use
Zend Studio 13.0.1
Powerful PHP integrated development environment
Dreamweaver CS6
Visual web development tools
SublimeText3 Mac version
God-level code editing software (SublimeText3)
Hot Topics
What should I do if I encounter garbled code printing for front-end thermal paper receipts?
Apr 04, 2025 pm 02:42 PM
Frequently Asked Questions and Solutions for Front-end Thermal Paper Ticket Printing In Front-end Development, Ticket Printing is a common requirement. However, many developers are implementing...
Demystifying JavaScript: What It Does and Why It Matters
Apr 09, 2025 am 12:07 AM
JavaScript is the cornerstone of modern web development, and its main functions include event-driven programming, dynamic content generation and asynchronous programming. 1) Event-driven programming allows web pages to change dynamically according to user operations. 2) Dynamic content generation allows page content to be adjusted according to conditions. 3) Asynchronous programming ensures that the user interface is not blocked. JavaScript is widely used in web interaction, single-page application and server-side development, greatly improving the flexibility of user experience and cross-platform development.
Who gets paid more Python or JavaScript?
Apr 04, 2025 am 12:09 AM
There is no absolute salary for Python and JavaScript developers, depending on skills and industry needs. 1. Python may be paid more in data science and machine learning. 2. JavaScript has great demand in front-end and full-stack development, and its salary is also considerable. 3. Influencing factors include experience, geographical location, company size and specific skills.
How to merge array elements with the same ID into one object using JavaScript?
Apr 04, 2025 pm 05:09 PM
How to merge array elements with the same ID into one object in JavaScript? When processing data, we often encounter the need to have the same ID...
Is JavaScript hard to learn?
Apr 03, 2025 am 12:20 AM
Learning JavaScript is not difficult, but it is challenging. 1) Understand basic concepts such as variables, data types, functions, etc. 2) Master asynchronous programming and implement it through event loops. 3) Use DOM operations and Promise to handle asynchronous requests. 4) Avoid common mistakes and use debugging techniques. 5) Optimize performance and follow best practices.
How to achieve parallax scrolling and element animation effects, like Shiseido's official website?
or:
How can we achieve the animation effect accompanied by page scrolling like Shiseido's official website?
Apr 04, 2025 pm 05:36 PM
Discussion on the realization of parallax scrolling and element animation effects in this article will explore how to achieve similar to Shiseido official website (https://www.shiseido.co.jp/sb/wonderland/)...
The Evolution of JavaScript: Current Trends and Future Prospects
Apr 10, 2025 am 09:33 AM
The latest trends in JavaScript include the rise of TypeScript, the popularity of modern frameworks and libraries, and the application of WebAssembly. Future prospects cover more powerful type systems, the development of server-side JavaScript, the expansion of artificial intelligence and machine learning, and the potential of IoT and edge computing.
The difference in console.log output result: Why are the two calls different?
Apr 04, 2025 pm 05:12 PM
In-depth discussion of the root causes of the difference in console.log output. This article will analyze the differences in the output results of console.log function in a piece of code and explain the reasons behind it. �...
