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{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"run action while componentDidMount do not trigger props update","articleBody":"```\r\n@connect({\r\n  a: 'a',\r\n}, {\r\n  doSomething: () =\u003e {\r\n    return {a: 'b'};\r\n  }\r\n})\r\nexport class Example extends Component\u003cIProps, IState\u003e {\r\n  componentDidMount() {\r\n    this.props.doSomething();\r\n  }\r\n\r\n  componentWillReceiveProps(nextProps) {\r\n    console.log(\"nextProps\", nextProps);\r\n  }\r\n}\r\n```\r\n\r\nthis example shows what i had done.\r\n\r\n**i triggered an action in componentDidMount, but componentWillReceiveProps can not receive any update.**\r\n\r\ni look into the code and found out the problem is the wrapper outside my component register a listener while componentDidMount, but its child componet, **my component, mounted before the wrapper.**\r\n\r\n**so when my component run componentDidMount, the wrapper haven't run the subscription method yet. therefore it can't reveive any update.**\r\n\r\nso why not use the **componentWillMount** to replace the **componentDidMount**. **componentWillMount** will be triggered in a right order from parent to child. so subscription function can capture and update any changes from the child component.","author":{"url":"https://github.com/dev-johnny-gh","@type":"Person","name":"dev-johnny-gh"},"datePublished":"2019-08-09T13:53:04.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":1},"url":"https://github.com/169/unistore/issues/169"}