Web Front-end
JS Tutorial
How to get the complete style declaration of a character in IText using FabricJS?
How to get the complete style declaration of a character in IText using FabricJS?
In this tutorial, we will learn how to get the complete style declaration of a character in IText using FabricJS. The IText class was introduced in FabricJS version 1.4, which extends Fabric.Text and is used to create IText instances. IText instances give us the freedom to select, cut, paste or add new text without additional configuration. There are also various supported key combinations and mouse/touch combinations to make text interactive that are not available in Text.
However, IText-based Textbox allows us to resize the text rectangle and wrap it automatically. This is not the case for IText, as the height does not adjust based on line breaks. We can manipulate IText objects by using various properties. Likewise, we can get the complete style declaration of a character using the getCompleteStyleDeclaration method.
grammar
getCompleteStyleDeclaraction(lineIndex: Number, charIndex: Number): Object
parameter
lineIndex - This parameter accepts a Number that specifies the line number of the required characters.
charIndex - This parameter accepts a number indicating the position of the character on the line.
Example 1
Use getCompleteStyleDeclaration method
Let's look at a code example to see what an IText object looks like when using the getCompleteStyleDeclaration method. In this case, we return the full style declaration for the second character of line 0. The character has been assigned a light yellow text background color.
<!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 id="Using-the-getCompleteStyleDeclaration-method">Using the getCompleteStyleDeclaration method</h2>
<p>You can open console from dev tools and see the style declaration for 2nd character of the first line</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 an itext object
var itext = new fabric.IText(
"Add sample text here.Lorem ipsum dolor sit ametconsectetur adipiscing elit.",{
width: 300,
left: 60,
top: 70,
fill: "red",
styles: {
0: {
1: {
textBackgroundColor: "rgba(253,255,214,0.9)",
},
},
},
}
);
// Add it to the canvas
canvas.add(itext);
// Using getCompleteStyleDeclaration method
console.log(
"The style object is as follows: ",
itext.getCompleteStyleDeclaration(0, 1)
);
</script>
</body>
</html>
Example 2
Use getCompleteStyleDeclaration method for comparison
Let's look at a code example that compares style declarations for two characters at the same index in two different lines. In this example, we have selected the second character in line 1 and line 2, so they have been highlighted with different text background colors. Since we specified different fill colors, textBackgroundColor, and fontSize for these two characters, these values will be reflected in our console and we will be able to compare the changes.
<!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 id="Using-the-getCompleteStyleDeclaration-method-for-comparison">Using the getCompleteStyleDeclaration method for comparison</h2>
<p>You can open console from dev tools and see the style declaration for both lines</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 an itext object
var itext = new fabric.IText(
"Add sample text here.Lorem ipsum dolor sit amet",{
width: 300,
left: 60,
top: 70,
fill: "red",
styles: {
0: {
1: {
textBackgroundColor: "rgba(130,111,201,0.6)",
fontSize: 30,
fill: "black",
},
},
1: {
1: {
textBackgroundColor: "rgba(52,235,189,0.5)",
fontSize: 90,
fill: "green",
},
},
},
}
);
// Add it to the canvas
canvas.add(itext);
// Using getCompleteStyleDeclaration method
console.log(
"The style object for 2nd character of 1st line is as follows: ",
itext.getCompleteStyleDeclaration(0, 1)
);
console.log(
"The style object for 2nd character of 2nd line is as follows: ",
itext.getCompleteStyleDeclaration(1, 1)
);
</script>
</body>
</html>
The above is the detailed content of How to get the complete style declaration of a character in IText 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
1386
52
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...
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...
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.
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. �...
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/)...
TypeScript for Beginners, Part 2: Basic Data Types
Mar 19, 2025 am 09:10 AM
Once you have mastered the entry-level TypeScript tutorial, you should be able to write your own code in an IDE that supports TypeScript and compile it into JavaScript. This tutorial will dive into various data types in TypeScript. JavaScript has seven data types: Null, Undefined, Boolean, Number, String, Symbol (introduced by ES6) and Object. TypeScript defines more types on this basis, and this tutorial will cover all of them in detail. Null data type Like JavaScript, null in TypeScript
Can PowerPoint run JavaScript?
Apr 01, 2025 pm 05:17 PM
JavaScript can be run in PowerPoint, and can be implemented by calling external JavaScript files or embedding HTML files through VBA. 1. To use VBA to call JavaScript files, you need to enable macros and have VBA programming knowledge. 2. Embed HTML files containing JavaScript, which are simple and easy to use but are subject to security restrictions. Advantages include extended functions and flexibility, while disadvantages involve security, compatibility and complexity. In practice, attention should be paid to security, compatibility, performance and user experience.
