Function createElement

packages/react/src/jsx.ts:38–74

(
	type: ElementType,
	config: any,
	...maybeChildren: any
)

}

export const createElement = (
	type: ElementType,
	config: any,
	...maybeChildren: any
) => {
	let key: Key = null;
	const props: Props = {};
	let ref: Ref = null;

	for (const prop in config) {
		const val = config[prop];
		if (prop === 'key') {
			if (val !== undefined) {
				key = '' + val;
			}
			continue;
		}
		if (prop === 'ref') {
			if (val !== undefined) {
				ref = val;
			}
			continue;
		}
		if ({}.hasOwnProperty.call(config, prop)) {
			props[prop] = val;
		}
	}
	const maybeChildrenLength = maybeChildren.length;
	if (maybeChildrenLength) {
		if (maybeChildrenLength === 1) {
			props.children = maybeChildren[0];
		} else {
			props.children = maybeChildren;
		}
	}
	return ReactElement(type, key, ref, props);
};

export const Fragment = REACT_FRAGMENT_TYPE;