Tutorial on drawing a smiling face using Canvas in HTML5

This article mainly introduces a tutorial on using Canvas in HTML5 to draw a smiling face. Using Canvas for drawing is a basic function in HTML5. Friends who need it can refer to it

Today, you will learn a web technology called Canvas and its association with the document object model (often called DOM). This technology is very powerful because it enables web developers to access and modify HTML elements by using JavaScript.

Now you may be wondering why we need to use JavaScript drastic. In short, HTML and JavaScript are interdependent, and some HTML components, such as canvas elements, cannot be used alone from JavaScript. After all, if we can't draw on it, what can canvas do?

To better understand this concept, we will try to draw a simple smiley face with a sample project. Let's get started.

start

First create a new directory to save your project files, and then open your favorite text editor or web development tool. Once you do this, you should create an empty index.html and an empty script.js, after which we will continue to edit.

Next, let's modify the index.html file, which won't involve a lot of things, because most of the code in our project will be written in JavaScript. What we need to do in HTML is to create a canvas element and reference script.js, which is quite straightforward: