Automatically submitting forms in react-hook-form-JS Tutorial-php.cn

Automatically submitting forms in react-hook-form

React Hook Form is a powerful library for managing forms in React, offering excellent performance and a flexible API. However, there are scenarios where you might want to create a form that does not behave exactly like a standard form. Sometimes form data needs to be submitted automatically when changes occur. This is particularly useful for forms that require real-time validation and submission, such as search forms or dynamic filtering interfaces.

Let's say, we have a simple search form for emails.

import { useForm } from 'react-hook-form'; interface FormValues { content: string; email: string; } const SearchForm = () => { const { register, handleSubmit } = useForm(); const onSubmit = (data: FormValues) => { console.log('Form submitted:', data); }; return (  Search by
  Content:  
  Email:  
 
 ); };

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But then we might want to remove the "Submit" button and submit data without it. To do that, we can create a custom reusable hook that will automatically submit the form when it changes.

import { debounce } from 'lodash'; import { useCallback, useEffect, useState } from 'react'; import { type UseFormWatch, type FieldValues, type UseFormTrigger, type Path } from 'react-hook-form'; interface AutoSubmitProps { trigger: UseFormTrigger; watch: UseFormWatch; excludeFields?: Path[]; onSubmit: () => void; onValidationFailed?: () => void; debounceTime?: number; } /** * Automatically submit data when it's changed */ export const useAutoSubmit = ({ trigger, watch, onSubmit, debounceTime = 500, excludeFields, onValidationFailed, }: AutoSubmitProps) => { const [isSubmiting, setIsSubmiting] = useState(false); const debouncedSumbit = useCallback( debounce((submitFn: () => void) => { submitFn(); }, debounceTime), [], ); useEffect(() => { const subscription = watch((_data, info) => { if (info?.type !== 'change') return; if (info.name && excludeFields?.includes(info.name)) return; setIsSubmiting(true); trigger() .then((valid) => { if (valid) debouncedSumbit(onSubmit); else onValidationFailed?.(); }) .finally(() => setIsSubmiting(false)); }); return () => subscription.unsubscribe(); }, [watch, onSubmit]); return { isSubmiting }; };

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How it works

trigger: Triggers validation for the entire form or specific fields.
watch: Monitors form data changes.
onSubmit: The function to execute when the form is successfully validated.
debounceTime: Controls how often the form should be submitted after changes (default is 500ms).
onValidationFailed: An optional callback for handling validation failures

The hook automatically triggers form validation when a field changes. If the validation is successful, it debounces the submission to avoid excessive requests.

Usage

import { useForm } from 'react-hook-form'; import { useAutoSubmit } from './useAutoSubmit'; interface FormValues { content: string; email: string; } const SearchForm = () => { const { register, handleSubmit, trigger, watch } = useForm(); const onSubmit = (data: FormValues) => { console.log('Form submitted:', data); }; useAutoSubmit({ trigger, watch, onSubmit: handleSubmit(onSubmit), }); return (  Search by
  Content:  
  Email:  
 
 ); };

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The useAutoSubmit hook simplifies the process of automatically submitting forms in React applications. By using this hook, you can ensure that your forms are always up-to-date with the latest user input, reducing the need for manual submissions and enhancing the overall user experience

Snippet source code

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