Passing references in React to parent components

Struggling to adopt the react way of thinking, I'm facing an issue with invoking the .submit() method of the form component.

Within a material-ui Dialog, buttons are passed via the actions property. Now, I need to trigger the .submit() method of the Form component, which is nested inside the dialog, from the Actions component.

Should I pass the formRef up to the Dialog in order to then pass it down to the Actions? Is there perhaps a more idiomatic React approach that I am not grasping?

class FormDialog extends React.Component {
    render() {
        return (
            <Dialog actions={<Actions />} >
                <Form />
            </Dialog>
        )
    }
}

const Actions = (props) => {
    return (
        <FlatButton
            label="Submit"
            onTouchTap={() => formRef.submit()}
        />
    )
} 

const Form = () => {
    let formRef;
    return (
        <AutoForm 
            ref={ref => formRef = ref}
            onSubmit={doc => db.save(doc)} 
            >
        </AutoForm>
    )
} 

Answer №1

It is important to ensure that any buttons within a form that are meant to submit the form should have the attribute type="submit". By clicking on these buttons, the <form />'s onSubmit handler will be triggered without the need to pass references around.

Here are some key points to keep in mind when following the React way:

  • Avoid passing data "up" and then back "down" through a component tree as it may indicate an incorrect approach to the problem at hand.
  • Components should not call methods on other components in order to maintain better encapsulation and separation of concerns.
  • When dealing with refs to DOM elements, it is recommended to only reference them within the component that owns the ref unless there is a clear understanding of when they are needed elsewhere.

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