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Adding examples

Examples help demonstrate different programming concepts and functionality of the library. They can be found on the p5.js examples page, and run on the page, allowing people to edit and play with them. We are in the process of porting examples from the Processing site, as well as creating new ones, and would love your help. Below are the steps below to add examples to p5js.org.

Getting started

  1. If you are not yet familiar with GitHub we recommend checking out this tutorial.

  2. Install node.js, which also automatically installs the npm package manager.

  3. Fork the p5.js-website repository into your own GitHub account.

  4. Clone your new fork of the repository from GitHub onto your local computer.

  5. Using the command line, navigate to the src/data/examples/build_examples folder, and install all its necessary dependencies with npm.

    cd src/data/examples/build_examples
    npm install

Make an issue

  1. Open a new issue on the p5.js-website repository listing the examples you are creating with your name, so efforts aren't duplicated.

Create your example

  1. First, build and test the example code using your HTML file, linking to the most recent version of p5.js. You can find examples to port here.

    • Please use two spaces tabs and see this code style guide.
    • Examples should typically be 710px wide, and a recommended height is 400px. You can modify these dimensions (especially the height) as appropriate.
  2. At the top of the JS file you create, add a heading using the template below.

    • The @name field determines the title of the example and the text of its corresponding link on the examples page.
    • The @frame field determines the dimensions of the example frame on the page. If you leave this field out, your running example will default to the size you set with createCanvas(). If you'd like to specify an alternate size (maybe because you have elements outside the canvas, for example), include the @frame line with dimensions separated by a comma.
    /*
     * @name Your Example Name Here (This shows up on the examples page as well.)
     * @frame 710,400 (optional)
     * @arialabel If there is a frame, add more context to its relation to the description and code for users interacting with your example with a screen reader. 
     * @description Write a description of your example here. This gets displayed
     * on the page underneath your example. You can use <br><br> to add a line
     * break. Please limit lines to 80 columns (total characters) long.
     */
    

Add your example to p5js.org

  1. Place the JS file with your code and heading (do not include the HTML or p5.js files) in src/data/examples/en/ of your local repository.

    • The subfolder the file is placed in determines the topic heading the examples displays under on p5js.org/examples. Add your file into the appropriate folder, or create a new one if necessary.
    • If you create a new folder, you will also need to add the folder name to the examples section in the src/data/en.yml, src/data/es.yml, and src/data/zh-Hans.yml files for the headings to show up properly.
    • The filename should follow the format: XX_name_of_your_example.js. The XX_ prefix (starting with 00) indicates the order that the files will show up on the page.
  2. Place duplicate copies of the file in the corresponding folders in src/data/examples/es/, and src/data/examples/zh-Hans/. This allows us to build the Spanish and Chinese versions of the example. If you know either of these languages, feel free to translate the heading text and comments.

  3. If you have any extra files that need to be included (images, JSON, etc), place them in the src/data/examples/assets folder. Try to keep these files small.

  4. Grunt should now be installed, and you can use it to build the website by navigating to the top-level directory and typing:

    npm run watch
  5. A local build of the p5js.org site should open in your web browser and you can navigate to the examples page to see your changes.

  6. Once everything is ready, submit your changes as a pull request.

Notes about translating examples

  • The p5js.org/examples page is built from the data in src/data/.
  • Within the examples folder, there is a folder for each of the three languages we currently support: en/, es/, and zh-Hans/.
  • Translations for the topic headers on the example index page are done in the YML files src/data/*.yml.

To add examples

  1. Locate the JS file within src/data/examples that corresponds to the example you want to add a translation for.
  2. Translate the heading and comments. Do not change variable or function names. Do not change the filename.
  3. To update a category heading on p5js.org/examples, edit the YML files at src/data/*.yml.

When adding a new example

  1. First, add an English version of the file to the en/ folder, then make sure it is duplicated in the same place in all other languages, then translate for whichever languages you can.
  2. The folder, file, and numbering structure should match exactly between the different languages. Do not change the filenames. The text for the example name, description, and source code are all in the .js files in the folders.
  3. If you have created a new folder, add entries to the "Examples" section of each of the YML files src/data/*.yml with the folder name as the key.