Function createElement

src/create-element.js:16–43

(type, props, children)

 * @returns {import('./internal').VNode}
 */
export function createElement(type, props, children) {
	let normalizedProps = {},
		key,
		ref,
		i;
	for (i in props) {
		if (i == 'key') key = props[i];
		else if (i == 'ref') ref = props[i];
		else normalizedProps[i] = props[i];
	}

	if (arguments.length > 2) {
		normalizedProps.children =
			arguments.length > 3 ? slice.call(arguments, 2) : children;
	}

	// If a Component VNode, check for and apply defaultProps
	// Note: type may be undefined in development, must never error here.
	if (typeof type == 'function' && type.defaultProps != NULL) {
		for (i in type.defaultProps) {
			if (normalizedProps[i] === UNDEFINED) {
				normalizedProps[i] = type.defaultProps[i];
			}
		}
	}

	return createVNode(type, normalizedProps, key, ref, NULL);
}

/**
 * Create a VNode (used internally by Preact)