ReactDOM.render()'s second argument indicates ...

ReactDOM.render()'s second argument indicates ...

• A. The DOM element to create
• B. The root component for rendering
• C. The container element on the page
• D. Indicates the element the first argument will be appended to and where on the screen it will appear.

Answer: (D)

The second argument determines where in the HTML the React element will be mounted. It is the DOM container, a real node on the page (for example, a div you’ve included like <div id="root"></div> and then referenced with document.getElementById('root')). React renders the first argument into that container, so you’re choosing both what to render and where it appears on the screen. This is why the second argument is described as indicating the element the rendered content will be appended to and where on the page it will show up.

The second argument determines where in the HTML the React element will be mounted. It is the DOM container, a real node on the page (for example, a div you’ve included like

and then referenced with document.getElementById('root')). React renders the first argument into that container, so you’re choosing both what to render and where it appears on the screen. This is why the second argument is described as indicating the element the rendered content will be appended to and where on the page it will show up.