/** Tiny helper for building a DOM subtree without a template-string or
 * framework dependency -- `el('button', {className: 'accent'}, 'Spawn')`
 * instead of three lines of createElement/assign/append per node. Used
 * throughout the editor's panels, which each own and inject their own DOM
 * rather than requiring the consuming app's index.html to pre-declare it. */
export declare function el<K extends keyof HTMLElementTagNameMap>(tag: K, props?: Partial<HTMLElementTagNameMap[K]>, ...children: Array<Node | string>): HTMLElementTagNameMap[K];