https://github.com/andrewjbateman/html5-canvas

:clipboard: Create an html canvas app, part of Javascript30 tutorial from Wes Bos
https://github.com/andrewjbateman/html5-canvas

canvas css html5 javascript tutorial-code video

Last synced: about 1 month ago
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:clipboard: Create an html canvas app, part of Javascript30 tutorial from Wes Bos

• Host: GitHub
• URL: https://github.com/andrewjbateman/html5-canvas
• Owner: AndrewJBateman
• Created: 2018-11-15T10:11:01.000Z (about 6 years ago)
• Default Branch: master
• Last Pushed: 2020-08-10T18:54:40.000Z (over 4 years ago)
• Last Synced: 2024-11-07T03:36:16.043Z (3 months ago)
• Topics: canvas, css, html5, javascript, tutorial-code, video
• Language: JavaScript
• Homepage:
• Size: 698 KB
• Stars: 0
• Watchers: 2
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md

Awesome Lists containing this project

README

        
# :zap: Javascript30 Tutorial HTML5-Canvas

* Wes Bos Youtube Tutorial 8/30: [Let's build something fun with HTML5 Canvas - #JavaScript30 8/30](https://www.youtube.com/watch?v=8ZGAzJ0drl0).

*** Note: to open web links in a new window use: _ctrl+click on link_**

## :page_facing_up: Table of contents

* [General info](#general-info)

* [Screenshots](#screenshots)

* [Technologies](#technologies)

* [Setup](#setup)

* [Features](#features)

* [Status](#status)

* [Inspiration](#inspiration)

* [Contact](#contact)

## :books: General info

* Draws coloured lines of varying width using mouse drawing events.

## :camera: Screenshots

![Example screenshot](./img/canvas.png).

## :signal_strength: Technologies

* [Javascript v1.9 ECMA-262 ECMAScript 2018](http://www.ecma-international.org/publications/standards/Ecma-262.htm)

## :floppy_disk: Setup

* Open index.html in browser. If any code is changed the browser needs to be refreshed.

## :computer: Code Examples

* Code to clear content and listen to mouse drawing events.

```javascript

/*function to clear all content inside the defined canvas rectangle*/

clearCanvas = () => {

    ctx.clearRect(0,0, canvas.width, canvas.height);

}

canvas.addEventListener('mousedown', (e) => {  

  isDrawing = true;

  [lastX, lastY] = [e.offsetX, e.offsetY];

});

canvas.addEventListener('mousemove', draw);

canvas.addEventListener('mouseup', () => isDrawing = false);

canvas.addEventListener('mouseout', () => isDrawing = false);

```

## :cool: Features

* Function to clear canvas using HTML bootstrap button.

## :clipboard: Status & To-Do List

* Status: Working. Updated to work from browser, not from Glitch.

* To-Do: clear error; `index.html:16 Uncaught TypeError: Cannot set property 'innerHTML' of null

    at HTMLButtonElement.onclick (index.html:16)`

## :clap: Inspiration

* Wes Bos Youtube Tutorial 8/30: [Let's build something fun with HTML5 Canvas - #JavaScript30 8/30](https://www.youtube.com/watch?v=8ZGAzJ0drl0)

## :envelope: Contact

* Repo created by [ABateman](https://www.andrewbateman.org) - you are welcome to [send me a message](https://andrewbateman.org/contact)