驗證是表單處理的關鍵方面,確保使用者輸入遵守特定規則。在本文中,我們將使用電話號碼、信用卡和 CVC 等範例,探索如何透過 React 和 React Native 的正規表示式驗證來建立可重複使用的自訂輸入元件。
使用自訂輸入可以讓您:
確保您安裝了以下相依性:
npm install react-hook-form zod @hookform/resolvers zod react-native-mask-input styled-components
這是可重複使用的 StyledInput 元件:
import React from "react"; import { Controller, FieldPath, FieldValues, useFormContext, } from "react-hook-form"; import { TextInputProps, View } from "react-native"; import styled from "styled-components/native"; const InputContainer = styled.View` width: 100%; `; const Label = styled.Text` font-size: 16px; color: ${({ theme }) => theme.colors.primary}; `; const InputBase = styled.TextInput` flex: 1; font-size: ${({ theme }) => `${theme.fontSizes.base}px`}; color: ${({ theme }) => theme.colors.primary}; height: ${({ theme }) => `${theme.inputSizes.base}px`}; border: 1px solid ${({ theme }) => theme.colors.border}; border-radius: 8px; padding: 8px; `; const ErrorMessage = styled.Text` font-size: 12px; color: ${({ theme }) => theme.colors.error}; `; interface StyledInputProps<TFieldValues extends FieldValues> extends TextInputProps { label: string; name: FieldPath<TFieldValues>; } export function StyledInput<TFieldValues extends FieldValues>({ label, name, ...inputProps }: StyledInputProps<TFieldValues>) { const { control, formState } = useFormContext<TFieldValues>(); const { errors } = formState; const errorMessage = errors[name]?.message as string | undefined; return ( <InputContainer> <Label>{label}</Label> <Controller control={control} name={name} render={({ field: { onChange, onBlur, value } }) => ( <InputBase onBlur={onBlur} onChangeText={onChange} value={value} {...inputProps} /> )} /> {errorMessage && <ErrorMessage>{errorMessage}</ErrorMessage>} </InputContainer> ); }
套用相同的邏輯,但將 TextInput 替換為 HTML 的 並相應地設定樣式。
為電話號碼和信用卡等輸入定義遮罩和驗證器:
import * as zod from "zod"; import { Mask } from "react-native-mask-input"; const turkishPhone = { mask: [ "+", "(", "9", "0", ")", " ", /\d/, /\d/, /\d/, " ", /\d/, /\d/, /\d/, "-", /\d/, /\d/, "-", /\d/, /\d/, ], validator: /^\+\(90\) \d{3} \d{3}-\d{2}-\d{2}$/, placeholder: "+(90) 555 555-55-55", }; const creditCard = { mask: [ /\d/, /\d/, /\d/, /\d/, "-", /\d/, /\d/, /\d/, /\d/, "-", /\d/, /\d/, /\d/, /\d/, "-", /\d/, /\d/, /\d/, /\d/, ], validator: /^\d{4}-\d{4}-\d{4}-\d{4}$/, placeholder: "4242-4242-4242-4242", }; const cvc = { mask: [/\d/, /\d/, /\d/], validator: /^\d{3}$/, placeholder: "123", }; const schema = zod.object({ phone: zod.string().regex(turkishPhone.validator, "Invalid phone number"), creditCard: zod .string() .regex(creditCard.validator, "Invalid credit card number"), cvc: zod.string().regex(cvc.validator, "Invalid CVC"), });
使用react-hook-form和zod進行驗證:
import { FormProvider, useForm } from "react-hook-form"; import { zodResolver } from "@hookform/resolvers/zod"; export default function FormScreen() { const form = useForm({ resolver: zodResolver(schema), mode: "onBlur", }); return ( <FormProvider {...form}> <StyledInput name="phone" label="Phone" placeholder={turkishPhone.placeholder} /> <StyledInput name="creditCard" label="Credit Card" placeholder={creditCard.placeholder} /> <StyledInput name="cvc" label="CVC" placeholder={cvc.placeholder} /> <button type="submit">Submit</button> </FormProvider> ); }
透過使用正規表示式驗證建立可重複使用的自訂輸入,您可以簡化表單處理並保持項目之間的一致性。這些元件在 React 和 React Native 中無縫運作,提供了出色的使用者體驗。
您可以隨意自訂遮罩、驗證器和樣式以滿足您的應用程式的要求。快樂編碼!
以上是在 React 和 React Native 中為正規表示式驗證建立自訂輸入的詳細內容。更多資訊請關注PHP中文網其他相關文章!