Allowing onClick conditionally

Question

I am having trouble making a Link onClick disabled if a condition is not met.

• Tried exporting the logic to a function outside the render, using an if condition is not met prevent default else execute the dispatch. Button is always disabled this way.
• Tried using CSS to disable click but realized I could just hit tab and enter to bypass.
• Tried adding a disabled={} to the Link but it does not work.
• Tried checking within the onClick if the condition is met otherwise undefined. Still goes through.

1ST ATTEMPT

class Order extends React.Component<OrderProps> {

  state = { referenceIsValid: true }

  handleClick = (e: any) => {
    if (!this.state.referenceIsValid) {
      e.preventDefault()
    } else {
      this.props.postProspect()
    }
  }
    render() {
  const {
    configuration: { referenceType, reference }
  }

  if (referenceType && referenceType === "required") {
    referenceIsValid = reference && reference.length > 0
  }

  return (
    {(referenceType === "required" || referenceType === "optional") && (
    <Field
      component={TextField}
      name="configuration.reference"
      label="References
      placeholder="People you have worked with."
      getErrors={(value: any) => {
        if (
          referenceType === "required" &&
            (value === undefined || value.length < 1)
          ) {
            return ["Add a reference"]
            }
            return []
          }}
       />
     )}

    <Link
      to={`/${slug}/client/finish`}
      onClick={e => this.handleClick(e)}
      > Order
    </Link>
  )
}

const connectedReview = connect(
  mapStateToProps,
  {
    postProspect,
  }
)(Review)

export default reduxForm({
  form: "orderForm",
  destroyOnUnmount: false,
})(connectedReview)

2ND ATTEMPT

let referenceIsValid = true

onClick={
  !referenceIsValid ? undefined : this.props.postProspect
}

I expect the button to be disabled unless at least one character has been enterred into the input field.

Answer 1

You need to prevent the default functionality. try something along the lines of this

let referenceIsValid = true

onClick={ e => !referenceIsValid ? e.preventDefault() : this.props.postProspect()

}

https://github.com/ReactTraining/react-router/issues/1082