I'm working on a todo application. This is a very simplified version of the offending code. I have a checkbox:
<p><input type="checkbox" name="area" checked={this.state.Pencil} onChange={this.checkPencil}/> Writing Item </p>
Here's the function that calls the checkbox:
checkPencil(){
this.setState({
pencil:!this.state.pencil,
});
this.props.updateItem(this.state);
}
updateItem is a function that's mapped to dispatch to redux
function mapDispatchToProps(dispatch){
return bindActionCreators({ updateItem}, dispatch);
}
My problem is that when I call the updateItem action and console.log the state, it is always 1 step behind. If the checkbox is unchecked and not true, I still get the state of true being passed to the updateItem function. Do I need to call another function to force the state to update?
You should invoke your second function as a callback to setState, as setState happens asynchronously. Something like:
this.setState({pencil:!this.state.pencil}, myFunction)
However in your case since you want that function called with a parameter you're going to have to get a bit more creative, and perhaps create your own function that calls the function in the props:
myFunction = () => {
this.props.updateItem(this.state)
}
Combine those together and it should work.