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The method of react looping map: first open the corresponding code file; then add a key as a unique identifier to the child element; and finally use map to traverse.
The operating environment of this tutorial: windows7 system, react17.0.1 version, Dell G3 computer.
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Map traversal in react
<ul id="ul_rwardList"> { this.state.reward.map(function (item) { return ( <li className="db vh" key={item.id}> <div className="fx1">{item.num}</div> <div className="fx1">{item.username}</div> <div className="fx1 text-right">{item.rward_time}</div> </li> )}) } </ul>
tips: When using map traversal, you need to give Add a key to the child element as a unique identifier, and the key values must be consecutive
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