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Start your free trialJonas Wu
13,928 Pointsprops.toggleConfirmationAt is not a function?
Hello all,
I think that I follow all the steps in this video. But after clicking the checkbox. I will get this type error.
How would you recommend to fix this issue? Thank you! :)
in the app.js:
toggleConfirmationAT = (indexToChange) =>
this.setState({
guests: this.state.guests.map((guest, index) => {
if (index === indexToChange) {
return {
...guest,
isConfirmed: !guest.isConfirmed
};
}
return guest;
})
});
<GuestsList
guests={this.state.guests}
toggleConfirmationAT={this.toggleConfirmationAT}
/>
in the GuestList.js:
const GuestList = (props) => {
return (
<ul>
{props.guests.map((guest, index) => (
<Guest
key={index}
name={guest.name}
isConfirmed={guest.isConfirmed}
handleConfirmation={() => props.toggleConfirmationAt(index)}
/>
))}
</ul>
);
};
GuestList.propTypes = {
guests: PropTypes.array.isRequired,
toggleConfirmationAt: PropTypes.func.isRequired
};
in Guest.js:
const Guest = (props) => {
return (
<li>
<span>{props.name}</span>
<label>
<input
type="checkbox"
checked={props.isConfirmed}
onChange={props.handleConfirmation}
/>
Confirmed
</label>
<button>edit</button>
<button>remove</button>
</li>
);
};
Guest.propTypes = {
name: PropTypes.string.isRequired,
isConfirmed: PropTypes.bool.isRequired,
handleConfirmation: PropTypes.func.isRequired
};
2 Answers
Michael Hulet
47,913 PointsI haven't run this to check, but it seems like you'd get an error like this because you're looking for a function named toggleConfirmationAt
, but you've previously named it toggleConfirmationAT
(notice the capital "T" instead of the lowercase). JavaScript is case-sensitive, which means toggleConfirmationAt
is totally different from toggleConfirmationAT
. If you make all your T
s lowercase, I think you might have better results 🙂
Jonas Wu
13,928 PointsThank you Michael :)
It works now, I'll be more careful of the cases next time!