I want to write a library based on p5js, so in my Javascript project I have Webpack installed as dev-dependency and I write this in start.js:
import p5 from "p5";
p5.ellipse(0, 0, 100, 100); // Function not found :(
However, no references are found in p5. I was expecting to find references to p5's functions like rect or ellipse or setup, but nothing.
More info
My Webpack config file is:
const path = require('path');
module.exports = {
entry: './start.js',
output: {
filename: 'start.js',
path: path.resolve(__dirname, 'out')
},
module: {
rules: [
/* In order to transpile ES6 */
{
test: /\.js$/,
exclude: /(node_modules|bower_ponents)/,
use: {
loader: 'babel-loader',
options: {
presets: ['env']
}
}
}
],
}
};
What am I doing wrong?
I want to write a library based on p5js, so in my Javascript project I have Webpack installed as dev-dependency and I write this in start.js:
import p5 from "p5";
p5.ellipse(0, 0, 100, 100); // Function not found :(
However, no references are found in p5. I was expecting to find references to p5's functions like rect or ellipse or setup, but nothing.
More info
My Webpack config file is:
const path = require('path');
module.exports = {
entry: './start.js',
output: {
filename: 'start.js',
path: path.resolve(__dirname, 'out')
},
module: {
rules: [
/* In order to transpile ES6 */
{
test: /\.js$/,
exclude: /(node_modules|bower_ponents)/,
use: {
loader: 'babel-loader',
options: {
presets: ['env']
}
}
}
],
}
};
What am I doing wrong?
Share Improve this question edited May 25, 2018 at 20:47 Andry asked May 25, 2018 at 20:37 AndryAndry 16.9k30 gold badges156 silver badges265 bronze badges 2- Possible duplicate of Cannot use p5.js in typeScript and Webpack – Kevin Workman Commented May 26, 2018 at 17:29
- My solution is to use instance mode. All of those objects are only accessible from the argument for the function u give p5. – iluvAS Commented Aug 10, 2019 at 8:03
2 Answers
Reset to default 6Like iluvAS said, you need to use instance mode.
// use this import in your webpack. Commented out because the CDN script exposes p5 as global
// import p5 from 'p5';
const containerElement = document.getElementById('p5-container');
const sketch = (p) => {
let x = 100;
let y = 100;
p.setup = function() {
p.createCanvas(800, 400);
};
p.draw = function() {
p.background(0);
p.fill(255);
p.rect(x, y, 50, 50);
};
};
new p5(sketch, containerElement);<script src="https://cdnjs.cloudflare./ajax/libs/p5.js/0.9.0/p5.js"></script>
<div id="p5-container"></div>Here is another working example with webpack and es6 module imports hosted on stackblitz (which uses webpack under the hood): https://stackblitz./edit/p5-in-webpack
Here's a plete, runnable P5 + Webpack starter, to supplement this answer, which correctly remends using p5's instance mode.
package.json:
{
"dependencies": {
"p5": "^1.9.3"
},
"devDependencies": {
"html-webpack-plugin": "^5.6.0",
"webpack": "^5.91.0",
"webpack-cli": "^5.1.4",
"webpack-dev-server": "^5.0.4"
}
}
webpack.config.js:
const path = require("path");
const HtmlWebpackPlugin = require("html-webpack-plugin");
module.exports = {
mode: "development",
entry: {
main: path.resolve("src", "index.js"),
},
output: {
filename: "index.js",
path: path.resolve("dist"),
},
plugins: [
new HtmlWebpackPlugin({
template: path.resolve("public", "index.html"),
}),
],
};
public/index.html:
<!doctype html>
<html lang="en">
<head>
<meta charset="utf-8"/>
<title>Webpack + P5</title>
</head>
<body>
<h1>Open the dev tools console to see p5 logging</h1>
</body>
</html>
src/index.js:
import p5 from "p5";
new p5(p => {
p.frameRate(2);
p.draw = () => {
p.print(p.frameCount);
};
});
Install and run:
$ npm i
$ npx webpack serve
Navigate to http://localhost:8080 and open the console to see the logs.
Note that Parcel provides a simpler, zero-config setup that may be more appropriate for basic p5 sketches than Webpack. See this answer for a minimal Parcel + P5 starter.
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