Spawn

A library that offers an alternative to the usual declarative approach to mount components imperatively.

Solid demo

React demo

Install from npm

Solid

npm install @web-spawn/solid

React

npm install @web-spawn/react

Quick setup

Just add <SpawnMountPoint /> to your App.tsx (or somewhere else in your project, as long as it's always mounted when using this library).

export function App() {
	return (
		<>
			<SpawnMountPoint />
			<div>Your code goes here</div>
		</>
	);
}

How to use

spawn will immediately append your element to the DOM (by default as a child of the body, but you can specify a different destination as a second parameter). The element will stay there until either resolve or reject is called: it will then be unmounted and the promise in result will be fulfilled.

const {result} = spawn((resolve, reject) => (
	<div>
		Hello!
		<button onClick={() => resolve('button was clicked')}>Close me</button>
		<button onClick={() => reject(new Error('user said no :('))}>Reject</button>
	</div>
));
try {
	console.log(await result);
} catch (err) {
	console.log('rejected');
}

spawnAnimate can be used to spawn component that require an animation: show will initially be false and automatically be set to true, thus triggering the opening transition.

When calling either resolve or reject, show will be set to false once again, so that your component can perform its closing animation. Once it's done (e.g. in an onHidden callback), call unmount to remove the element from the DOM without ruining the animation.

Warning: result will only be fulfilled after unmount is called.

const {result} = spawnAnimate((resolve, reject, unmount, show) => (
	<div>
		{show ? (
			<div>
				I am open
				<button onClick={() => resolve('button was clicked')}>Close me</button>
				<button onClick={() => reject(new Error('user said no :('))}>Reject</button>
			</div>
		) : (
			<div>
				Waiting to unmount...
				<button onClick={() => unmount()}>Unmount</button>
			</div>
		)}
	</div>
));
try {
	console.log(await result);
} catch (err) {
	console.log('rejected');
}