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Matthew Conlen mathisonian

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mathisonian / example.idyll
Last active Mar 30, 2020
Example question component that is only shown after a previous question is answered correctly. I haven't tested this but it should provide the basic structure.
View example.idyll
How to use:
[var name:"q1Correct" value:false /]
[Question options:`["test1", "test2"]` trueAnswer:"test1" correct:q1Correct /]
[var name:"q2Correct" value:false /]
[Question options:`["test1", "test2"]` trueAnswer:"test2" correct:q2Correct showAfter:q1Correct /]
mathisonian /
Last active Feb 11, 2020
Loading data with Parcel

This is a quick guide to loading static files with Parcel. There are two ways to load data in JavaScript:

  • including the data in the JavaScript bundle itself
  • fetching the data as an external resource

Including data directly in the JavaScript bundle

This is the preferred way of doing things if your data payload is relatively small (<1 MB) as it will lead to fewer network requests (which often gives better perfromance).

mathisonian / nav.js
Last active Jul 11, 2019
Nav Component
View nav.js
const React = require('react');
class CustomComponent extends React.Component {
render() {
const { hasError, idyll, updateProps, ...props } = this.props;
return (
<div style={{position: 'fixed', top: 0, left: 0, right: 0, display: 'flex', padding: '1em', background: '#000', justifyContent: 'space-between'}}>
<div style={{fontWeight: 'bold', fontSize: '2em', color: '#fff'}}>MY BLOG</div>
<div style={{display: 'flex'}}>
<div style={{fontSize: '1.5em', color: '#fff', marginRight: '1em'}}>A Link</div>
mathisonian / youtube.js
Last active Aug 23, 2018
Idyll Youtube Component
View youtube.js
import React from 'react';
let YouTube;
class YoutubeComponent extends React.Component {
constructor(props) {
this.state = {
mounted: false
mathisonian / d3-component.js
Last active Dec 4, 2017
Example stepper / play / pause
View d3-component.js
const React = require('react');
const D3Component = require('idyll-d3-component');
const d3 = require('d3');
const size = 600;
class CustomD3Component extends D3Component {
initialize(node, props) {
View filter.js
const React = require('react');
const D3Component = require('idyll-d3-component');
const d3 = require('d3');
class FilterComponent extends D3Component {
initialize(node, props) {
// instead of adding an svg, add a canvas
var canvas ="canvas")
mathisonian / mycomponent.js
Created Nov 27, 2017
injecting props in Idyll component
View mycomponent.js
import React from 'react';
import ReactDOM from 'react-dom';
class MyComponent extends React.PureComponent {
unwrapChildren() {
return => {
if (c => && === 'wrapper') {
return c.props.children[0];
return c;
View slideshow.js
const React = require('react');
const IdyllComponent = require('idyll-component');
const Slide = require('./slide');
class Slideshow extends IdyllComponent {
getChildren(children) {
let processedChildren = [];
React.Children.forEach(children, (child) => {
if (typeof child === 'string') {

Setting value on a variable just defines its initial value, if you want a variable that updates derived variables are available:

[var name:"x" value:1 /]
[derived name:"dataToBeCharted" value:`[ {x: 0, y: 0.5}, {x: 3.5, y: 0.5}, {x: 4, y: x}, {x: 4.5, y: 2}, {x: 5, y: 0.5}, {x: 8, y: 0.5} ]` /]

[Range value:x min:0 max:100 step:5/]
[Display value:x /]
mathisonian / spec.json
Created Jan 19, 2017
An example vega spec
View spec.json
"schema": {
"language": "vega",
"version": "3.0"
"width": 500,
"height": 200,
"padding": 5,
"data": [