Render react components everywhere in the DOM.
<WarpPortal>
<Modal open={openModal}>
<button onClick={this.handleCloseModal}>Close Modal</button>
<h1>Modal - 1</h1>
<p>Hello world!</p>
</Modal>
</WarpPortal>
<WarpPortal container={document.getElementById('some-where-in-the-dom')}>
<Modal open={openModal}>
<button onClick={this.handleCloseModal}>Close Modal</button>
<h1>Modal - 2</h1>
<p>Hello everybody!</p>
</Modal>
</WarpPortal>