Why divs are flashing?

Question

I'm new to React Virtualized, and sorry for my English. This is my code pen link: http://codepen.io/anon/pen/xqGXwv?editors=0010, when I scroll to the 4th div, it's flashing, could someone help me ?

Answer 1

You forgot to accept and set the style parameter. This parameter is very important for react-virtualized because it's what positioned the rows as you scroll down. Here's your render function, fixed:

  renderPage({index, key, style}) {
    const color = ['green', 'red', 'black', 'yellow'][index % 4]
    return (
      <div
        style={{ ...style, width: 400, height: 200, backgroundColor: color }}
        key={key}
      >
        No.{index + 1}
      </div>
    )
  }