# React shouldComponentUpdate() Method\\n\\n[ React Component Lifecycle](#)\\n\\nThe shouldComponentUpdate() method has the following format:\\n\\nshouldComponentUpdate(nextProps, nextState)\\n\\nThe shouldComponentUpdate() method returns a boolean value that specifies whether React should continue rendering. The default value is true, which means the component will re-render every time the **state** changes.\\n\\nThe return value of shouldComponentUpdate() is used to determine whether the output of the React component is affected by the current state or props changes. When props or state change, shouldComponentUpdate() is called before rendering is performed.\\n\\nThe following example demonstrates the operation when the shouldComponentUpdate() method returns false (clicking the button cannot make modifications):\\n\\n## Example\\n\\nclass Header extends React.Component{constructor(props){super(props); this.state = {favoritesite: "tutorial"}; }shouldComponentUpdate(){return false; }changeSite = () =>{this.setState({favoritesite: "google"}); }render(){return(); }}\\n\\n[Try it »](#)\\n\\nThe following example demonstrates the operation when the shouldComponentUpdate() method returns true (clicking the button can make modifications):\\n\\n## Example\\n\\nclass Header extends React.Component{constructor(props){super(props); this.state = {favoritesite: "tutorial"}; }shouldComponentUpdate(){return true; }changeSite = () =>{this.setState({favoritesite: "google"}); }render(){return(); }}\\n\\n[Try it »](#)\\n\\n[ React Component Lifecycle](#)\\n\\n[](#)(#)\\n\\n(#)[](#)\\n\\n[ByteArk Coding Plan supports mainstream large models such as Doubao, GLM, DeepSeek, Kimi, MiniMax, with official direct supply for stability and reliability. Configuration Guide ¥9.9/ Month - Activate Now](https://www.volcengine.com/activity/codingplan?utm_campaign=hw&utm_content=hw&utm_medium=devrel_tool_web&utm_sour