Setup method runs twice

p5.js Coding Questions
1

My p5js app runs the setup function twice. I have stripped the whole thing down as much as possible, and it’s still happening. This is messing with my app because (a) I wish to run some fairly heavy operations in setup and (b) I add some objects to an array in setup, and if it runs twice then the objects are doubled up.

My index.js looks like this:

const sketch = (processing) => {
  processing.setup = () => {
    console.log('run setup');
  };
};
const myProcessing = new p5(sketch);

…and my index.html looks like this:

<!DOCTYPE html>
<html>
<head>
  <meta charset="utf-8">
  <title>vis-p5js</title>
</head>
<body>
  <div id="test"></div>
</body>
<script src="./lib/p5.js"></script>
<script src="./lib/p5.sound.js"></script>
<script type="module" src="./src/index.js"></script>
</html>
2

Hello and welcome, @dansumption!

I can’t reproduce this locally. setup is only called once when running on p5.js 1.0.0. Could you host a complete example online for us to try? Is the problem present if you try another browser? Which version of p5.js are you on?

3

Hi Sven,

Thanks for checking this out.

Strange, I have version 1.0.0 here too.

I’ll stick a version online when I get a chance, as well as trying some more browsers. Have been running it in Chrome.

4

In case anyone else encounters this problem, I finally managed to solve it, and it was down to the way that I wasn instantiating processing and assigning the setup and draw methods. I’ve documented it in this thread: How to access p5js functions when using ES6 modules