Uncaught Invariant Violation Too many re-renders React limits the number of renders to prevent an infinite loop

Question

I m trying to add a snackBar in order to display a message whenever a user signIn or not  SnackBar jsx   import React from  react   import PropTypes from  prop-types   import classNames from  classnames   import CheckCircleIcon from   material-ui icons CheckCircle   import ErrorIcon from   material-ui icons Error   import CloseIcon from   material-ui icons Close   import green from   material-ui core colors green   import IconButton from   material-ui core IconButton   import Snackbar from   material-ui core Snackbar   import SnackbarContent from   material-ui core SnackbarContent   import   withStyles   from   material-ui core styles    const variantIcon       success  CheckCircleIcon    error  ErrorIcon     const styles1   theme   gt       success        backgroundColor  green 600         error        backgroundColor  theme palette error dark        icon        fontSize  20        iconVariant        opacity  0 9      marginRight  theme spacing unit        message        display   flex       alignItems   center           function SnackbarContentWrapper props      const   classes  className  message  onClose  variant     other     props    const Icon   variantIcon variant      return        lt SnackbarContent       className  classNames classes variant   className         aria-describedby  client-snackbar        message             lt span className  classes message  gt             lt Icon className  classNames classes icon  classes iconVariant     gt             message           lt  span gt                 action             lt IconButton           key  close            aria-label  Close            color  inherit            className  classes close            onClick  onClose           gt             lt CloseIcon className  classes icon    gt           lt  IconButton gt                     other        gt          SnackbarContentWrapper propTypes       classes  PropTypes shape       success  PropTypes string      error  PropTypes string      icon  PropTypes string      iconVariant  PropTypes string      message  PropTypes string       isRequired    className  PropTypes string isRequired    message  PropTypes node isRequired    onClose  PropTypes func isRequired    variant  PropTypes oneOf   success    error    isRequired     const MySnackbarContentWrapper   withStyles styles1  SnackbarContentWrapper    const CustomizedSnackbar        open    handleClose    variant    message      gt      return        lt div gt         lt Snackbar         anchorOrigin              vertical   bottom             horizontal   left                     open  open          autoHideDuration  6000          onClose  handleClose         gt           lt MySnackbarContentWrapper           onClose  handleClose            variant  variant            message  message            gt         lt  Snackbar gt       lt  div gt           CustomizedSnackbar propTypes       open  PropTypes bool isRequired    handleClose  PropTypes func isRequired    variant  PropTypes string isRequired    message  PropTypes string isRequired     export default CustomizedSnackbar    SignInFormContainer jsx   import React    useState   from  react   import PropTypes from  prop-types   import   connect   from  react-redux   import SnackBar from        components SnackBar   import SignInForm from    SignInForm    const SingInContainer      message  variant     gt        const  open  setSnackBarState    useState false       const handleClose    reason    gt            if  reason      clickaway               return                    setSnackBarState false                 if  variant            setSnackBarState true             return            lt div gt           lt SnackBar             open  open              handleClose  handleClose              variant  variant              message  message                gt           lt SignInForm  gt           lt  div gt           SingInContainer propTypes         variant  PropTypes string isRequired      message  PropTypes string isRequired    const mapStateToProps    state    gt        const  variant  message     state snackBar       return           variant          message          export default connect mapStateToProps  SingInContainer     When I run the application I got this error   Invariant Violation  Too many re-renders  React limits the number of renders to prevent an infinite loop  at invariant  http   localhost 9000 bundle js 34484 15  at dispatchAction  http   localhost 9000 bundle js 47879 44  at SingInContainer  http   localhost 9000 bundle js 79135 5  at renderWithHooks  http   localhost 9000 bundle js 47343 18  at updateFunctionComponent  http   localhost 9000 bundle js 49010 20  at beginWork  http   localhost 9000 bundle js 50020 16  at performUnitOfWork  http   localhost 9000 bundle js 53695 12  at workLoop  http   localhost 9000 bundle js 53735 24  at HTMLUnknownElement callCallback  http   localhost 9000 bundle js 34578 14  at Object invokeGuardedCallbackDev  http   localhost 9000 bundle js 34628 16    The problem is due to the SnackBar component  I use the useStatehooks in order to change the state of the snackBar  Should I use a class and a componentShouldUpdate in order to not render multiple times

User · Answer

You need to add an event  before call your handleFunction like this  function SingInContainer           handleClose        gt       return        lt SnackBar         open  open          handleClose       gt  handleClose          variant  variant          message  message            gt       lt SignInForm  gt

User · Answer

You can prevent from this error by using hooks inside a function

User · Answer

I suspect that the problem lies in the fact that you are calling your state setter immediately inside the function component body  which forces React to re-invoke your function again  with the same props  which ends up calling the state setter again  which triggers React to call your function again     and so on   const SingInContainer      message  variant     gt        const  open  setSnackBarState    useState false       const handleClose    reason    gt            if  reason      clickaway               return                    setSnackBarState false                 if  variant            setSnackBarState true      HERE BE DRAGONS           return            lt div gt           lt SnackBar             open  open              handleClose  handleClose              variant  variant              message  message                gt           lt SignInForm  gt           lt  div gt            Instead  I recommend you just conditionally set the default value for the state property using a ternary  so you end up with   const SingInContainer      message  variant     gt        const  open  setSnackBarState    useState variant   true   false                                         or useState   variant                                         or useState Boolean variant        const handleClose    reason    gt            if  reason      clickaway               return                    setSnackBarState false                 return            lt div gt           lt SnackBar             open  open              handleClose  handleClose              variant  variant              message  message                gt           lt SignInForm  gt           lt  div gt            Comprehensive Demo  See this CodeSandbox io demo for a comprehensive demo of it working  plus the broken component you had  and you can toggle between the two

User · Answer

In SnackbarContentWrapper you need to change    lt IconButton           key  close            aria-label  Close            color  inherit            className  classes close            onClick  onClose           gt    to    lt IconButton           key  close            aria-label  Close            color  inherit            className  classes close            onClick       gt  onClose           gt     so that it only fires the action when you click   Instead  you could just curry the handleClose in SingInContainer to  const handleClose        gt   reason    gt            if  reason      clickaway               return                    setSnackBarState false              It s the same

User · Answer

You must link an event in your onClick  Additionally  the click function must receive the event  See the example  export default function Component props         function clickEvent  event  variable           console log variable              return            lt div gt               lt IconButton                 key  close                  aria-label  Close                  color  inherit                  onClick  e   gt  clickEvent e  10                gt           lt  div gt

User · Answer

I also have the same problem  and the solution is I didn t bind the event in my onClick  so when it renders for the first time and the data is more  which ends up calling the state setter again  which triggers React to call your function again and so on  export default function Component props     function clickEvent  event  variable       console log variable      return        lt div gt           lt IconButton             key  quot close quot              aria-label  quot Close quot              color  quot inherit quot              onClick  e   gt  clickEvent e  10      or you can call like this onClick       gt  clickEvent 10             gt       lt  div gt

[javascript] Uncaught Invariant Violation: Too many re-renders. React limits the number of renders to prevent an infinite loop

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