Skip to content

Instantly share code, notes, and snippets.

What would you like to do?
Code for blogpost "Using JSX for your own lightweight declarative library":
const isFunction = s => typeof s === "function";
function createElement(tag, props, ...children) {
// If first argument is function, we know it is custom component,
// So call it as a function, passing the props with children as a property.
// Using spread like this will work when props is `null` also
if (isFunction(tag)) {
return tag({ ...props, children });
// Same as before
const el = attrs(document.createElement(tag), props);
children.forEach(child => {
const node = !isString(child) ? child : document.createTextNode(child);
return el;
Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment