跳至页脚内容
  1. IronPDF for Node.js
  2. IronPDF for Node.js 博客
  3. Node 帮助
  4. react hook form NPM
NODE 帮助

react hook form NPM（开发者如何使用）

Darrius Serrant
Darrius Serrant
已更新:

React Hook Form是一个强大且高效的库，用于管理React应用中的表单值。 它利用React hooks提供无缝且高性能的体验，而无需任何控制器组件。 在这篇文章中，我们将探讨React Hook Form提交的基础知识，包含自定义错误信息及其优点，并提供代码示例帮助你入门。

为什么使用React Hook Form？

  1. 性能：React Hook Form使用非受控组件和原生HTML输入，减少重渲染次数，提高性能。
  2. 简单性：API直观且易于使用，比其他表单库需要更少的代码行数。
  3. 灵活性：它支持复杂的React Hook Form验证、基于约束的验证API，并且与UI库良好集成。

安装

要安装React Hook Form，运行以下命令：

npm install react-hook-form
# or
yarn add react-hook-form
npm install react-hook-form
# or
yarn add react-hook-form
SHELL

基本用法

让我们使用React Hook Form创建一个没有受控组件和子组件的简单注册表单。

  1. 导入useForm Hook:
import { useForm } from "react-hook-form";
import { useForm } from "react-hook-form";
JAVASCRIPT
  1. 初始化Hook:
const { register, handleSubmit, formState: { errors } } = useForm();
const { register, handleSubmit, formState: { errors } } = useForm();
JAVASCRIPT
  1. 创建具有输入字段和错误处理的表单:
function RegistrationForm() {
  const { register, handleSubmit, formState: { errors } } = useForm();

  // Function to handle form submission
  const onSubmit = (data) => {
    console.log(data);
  };

  return (
    <form onSubmit={handleSubmit(onSubmit)}>
      <div>
        <label>First Name</label>
        <input {...register("firstName", { required: true })} />
        {errors.firstName && <span>This field is required</span>}
      </div>
      <div>
        <label>Last Name</label>
        <input {...register("lastName", { required: true })} />
        {errors.lastName && <span>This field is required</span>}
      </div>
      <div>
        <label>Email</label>
        <input {...register("email", { required: true, pattern: /^[a-z0-9._%+-]+@[a-z0-9.-]+\.[a-z]{2,4}$/ })} />
        {errors.email && <span>Invalid email address</span>}
      </div>
      <button type="submit">Submit</button>
    </form>
  );
}
function RegistrationForm() {
  const { register, handleSubmit, formState: { errors } } = useForm();

  // Function to handle form submission
  const onSubmit = (data) => {
    console.log(data);
  };

  return (
    <form onSubmit={handleSubmit(onSubmit)}>
      <div>
        <label>First Name</label>
        <input {...register("firstName", { required: true })} />
        {errors.firstName && <span>This field is required</span>}
      </div>
      <div>
        <label>Last Name</label>
        <input {...register("lastName", { required: true })} />
        {errors.lastName && <span>This field is required</span>}
      </div>
      <div>
        <label>Email</label>
        <input {...register("email", { required: true, pattern: /^[a-z0-9._%+-]+@[a-z0-9.-]+\.[a-z]{2,4}$/ })} />
        {errors.email && <span>Invalid email address</span>}
      </div>
      <button type="submit">Submit</button>
    </form>
  );
}
JAVASCRIPT

输出

react hook form NPM（开发者指南）：图1 - 注册表单输出

高级用法

React Hook Form支持更复杂的用例，比如与第三方UI库和自定义验证集成。

  1. 与Material-UI集成:
import { TextField, Button } from '@material-ui/core';
import { useForm, Controller } from 'react-hook-form';

function MaterialUIForm() {
  const { control, handleSubmit } = useForm();

  // Function to handle form submission
  const onSubmit = (data) => {
    console.log(data);
  };

  return (
    <form onSubmit={handleSubmit(onSubmit)}>
      <Controller
        name="firstName"
        control={control}
        defaultValue=""
        // Using Material-UI's TextField as a controlled component
        render={({ field }) => <TextField {...field} label="First Name" />}
      />
      <Controller
        name="lastName"
        control={control}
        defaultValue=""
        render={({ field }) => <TextField {...field} label="Last Name" />}
      />
      <Button type="submit">Submit</Button>
    </form>
  );
}
import { TextField, Button } from '@material-ui/core';
import { useForm, Controller } from 'react-hook-form';

function MaterialUIForm() {
  const { control, handleSubmit } = useForm();

  // Function to handle form submission
  const onSubmit = (data) => {
    console.log(data);
  };

  return (
    <form onSubmit={handleSubmit(onSubmit)}>
      <Controller
        name="firstName"
        control={control}
        defaultValue=""
        // Using Material-UI's TextField as a controlled component
        render={({ field }) => <TextField {...field} label="First Name" />}
      />
      <Controller
        name="lastName"
        control={control}
        defaultValue=""
        render={({ field }) => <TextField {...field} label="Last Name" />}
      />
      <Button type="submit">Submit</Button>
    </form>
  );
}
JAVASCRIPT

输出

react hook form NPM（开发者指南）：图2 - Material UI表单输出

  1. 自定义验证:
function CustomValidationForm() {
  const { register, handleSubmit, formState: { errors } } = useForm();

  // Function to handle form submission
  const onSubmit = (data) => {
    console.log(data);
  };

  return (
    <form onSubmit={handleSubmit(onSubmit)}>
      <div>
        <label>Username</label>
        <input {...register("username", { 
          required: "Username is required", 
          validate: value => value !== "admin" || "Username cannot be 'admin'" 
        })} />
        {errors.username && <span>{errors.username.message}</span>}
      </div>
      <button type="submit">Submit</button>
    </form>
  );
}
function CustomValidationForm() {
  const { register, handleSubmit, formState: { errors } } = useForm();

  // Function to handle form submission
  const onSubmit = (data) => {
    console.log(data);
  };

  return (
    <form onSubmit={handleSubmit(onSubmit)}>
      <div>
        <label>Username</label>
        <input {...register("username", { 
          required: "Username is required", 
          validate: value => value !== "admin" || "Username cannot be 'admin'" 
        })} />
        {errors.username && <span>{errors.username.message}</span>}
      </div>
      <button type="submit">Submit</button>
    </form>
  );
}
JAVASCRIPT

输出

react hook form NPM（开发者指南）：图3 - 自定义验证表单输出

IronPDF简介

react hook form NPM（开发者指南）：图4 - IronPDF

IronPDF for Node.js是一个用于生成、编辑和转换PDF的流行PDF文档生成库。 IronPDF程序包专为Node.js应用设计。 以下是一些关于IronPDF NPM包的关键功能和细节。

关键特性

URL到PDF转换

直接从URL生成PDF文档，使你可以程序化地捕获网页内容并将其保存为PDF文件。

HTML 到 PDF 转换

轻松将HTML内容转换为PDF文档。 此功能特别适合从网络内容生成动态PDF。

PDF操作

轻松合并、拆分和操作现有PDF文档。 IronPDF提供了添加页面、拆分文档等功能。

PDF安全

通过密码加密或应用数字签名来保护您的PDF文档。 IronPDF提供了保护您的敏感文档免受未经授权访问的选项。

高质量输出

生成高质量的PDF文档，精确呈现文本、图像和格式。 IronPDF确保您生成的PDF保持对原始内容的忠实。

跨平台兼容性

IronPDF与多种平台兼容，包括Windows、Linux和macOS，使其适用于广泛的开发环境。

简单集成

轻松将IronPDF集成到您的Node.js应用程序中，使用其npm包。 API有良好的文档记录，使得将PDF生成功能融入您的项目变得简单明了。

安装

安装IronPDF NPM包，请使用以下命令：

yarn add @ironsoftware/ironpdf @ironsoftware/ironpdf-engine-windows-x64
yarn add @ironsoftware/ironpdf @ironsoftware/ironpdf-engine-windows-x64
SHELL

使用IronPDF生成PDF文档并使用Prettier NPM包

安装依赖：首先，使用以下命令创建一个新的Next.js项目（如果还没有创建）。 请参阅Next.js设置页面

npx create-next-app@latest reacthookform-pdf --use-npm --example "https://github.com/vercel/next-learn/tree/main/basics/learn-starter"
npx create-next-app@latest reacthookform-pdf --use-npm --example "https://github.com/vercel/next-learn/tree/main/basics/learn-starter"
SHELL

接下来，导航到您的项目目录：

cd reacthookform-pdf
cd reacthookform-pdf
SHELL

安装所需的包：

yarn add @ironsoftware/ironpdf @ironsoftware/ironpdf-engine-windows-x64
yarn add -D prettier
yarn add @ironsoftware/ironpdf @ironsoftware/ironpdf-engine-windows-x64
yarn add -D prettier
SHELL

创建PDF

现在，让我们创建一个使用IronPDF生成PDF的简单示例。

PDF生成API：第一步是创建一个后端API来生成PDF文档。 由于IronPDF仅在服务端运行，我们需要创建一个API来在用户想要生成PDF时进行调用。 在路径pages/api/pdf.js中创建一个文件，并添加以下内容。

IronPDF需要一个许可密钥，您可以从许可页面获取，并将其放入下面的代码中。

// pages/api/pdf.js
import { IronPdfGlobalConfig, PdfDocument } from "@ironsoftware/ironpdf";

// Apply your IronPDF license key
IronPdfGlobalConfig.getConfig().licenseKey = "your license";

export default async function handler(req, res) {
  try {
    const f = req.query.f;
    const l = req.query.l;
    const e = req.query.e;

    // Define HTML content for the PDF
    let content = "<h1>Demo React Hook Form and Generate PDF Using IronPDF</h1>";
    content += "<p>First Name: " + f + "</p>";
    content += "<p>Last Name: " + l + "</p>";
    content += "<p>Email: " + e + "</p>";

    // Generate PDF from HTML
    const pdf = await PdfDocument.fromHtml(content);
    const data = await pdf.saveAsBuffer();

    res.setHeader("Content-Type", "application/pdf");
    res.setHeader(
      "Content-Disposition",
      "attachment; filename=awesomeIron.pdf"
    );
    res.send(data);
  } catch (error) {
    console.error("Error generating PDF:", error);
    res.status(500).end();
  }
}
// pages/api/pdf.js
import { IronPdfGlobalConfig, PdfDocument } from "@ironsoftware/ironpdf";

// Apply your IronPDF license key
IronPdfGlobalConfig.getConfig().licenseKey = "your license";

export default async function handler(req, res) {
  try {
    const f = req.query.f;
    const l = req.query.l;
    const e = req.query.e;

    // Define HTML content for the PDF
    let content = "<h1>Demo React Hook Form and Generate PDF Using IronPDF</h1>";
    content += "<p>First Name: " + f + "</p>";
    content += "<p>Last Name: " + l + "</p>";
    content += "<p>Email: " + e + "</p>";

    // Generate PDF from HTML
    const pdf = await PdfDocument.fromHtml(content);
    const data = await pdf.saveAsBuffer();

    res.setHeader("Content-Type", "application/pdf");
    res.setHeader(
      "Content-Disposition",
      "attachment; filename=awesomeIron.pdf"
    );
    res.send(data);
  } catch (error) {
    console.error("Error generating PDF:", error);
    res.status(500).end();
  }
}
JAVASCRIPT

现在修改index.js。

import Head from "next/head";
import styles from "../styles/Home.module.css";
import React from "react";
import { useForm } from "react-hook-form";

export default function Home() {
  const { register, handleSubmit, formState: { errors } } = useForm();

  // Handle form submission to generate PDF
  const onSubmit = (data) => {
    generatePdf(data);
  };

  // Function to generate PDF by calling the backend API
  const generatePdf = async (data) => {
    try {
      const response = await fetch(`/api/pdf-html?f=${data["firstName"]}&l=${data["lastName"]}&e=${data["email"]}`);
      const blob = await response.blob();
      const url = window.URL.createObjectURL(new Blob([blob]));
      const link = document.createElement("a");
      link.href = url;
      link.setAttribute("download", "awesomeIron.pdf");
      document.body.appendChild(link);
      link.click();
      link.parentNode.removeChild(link);
    } catch (error) {
      console.error("Error generating PDF:", error);
    }
  };

  return (
    <div className={styles.container}>
      <Head>
        <title>Generate PDF Using IronPDF</title>
        <link rel="icon" href="/favicon.ico" />
      </Head>
      <main>
        <h1>Demo React Hook Form and Generate PDF Using IronPDF</h1>
        <form onSubmit={handleSubmit(onSubmit)}>
          <div>
            <label>First Name</label>
            <input {...register("firstName", { required: true })} />
            {errors.firstName && <span>This field is required</span>}
          </div>
          <div>
            <label>Last Name</label>
            <input {...register("lastName", { required: true })} />
            {errors.lastName && <span>This field is required</span>}
          </div>
          <div>
            <label>Email</label>
            <input {...register("email", { required: true, pattern: /^[a-z0-9._%+-]+@[a-z0-9.-]+\.[a-z]{2,4}$/ })} />
            {errors.email && <span>Invalid email address</span>}
          </div>
          <button type="submit">Submit and Generate PDF</button>
        </form>
      </main>
      <style jsx>{`
        main {
          padding: 5rem 0;
          flex: 1;
          display: flex;
          flex-direction: column;
          justify-content: center;
          align-items: center;
        }
        footer {
          width: 100%;
          height: 100px;
          border-top: 1px solid #eaeaea;
          display: flex;
          justify-content: center;
          align-items: center;
        }
        footer img {
          margin-left: 0.5rem;
        }
        footer a {
          display: flex;
          justify-content: center;
          align-items: center;
          text-decoration: none;
          color: inherit;
        }
        code {
          background: #fafafa;
          border-radius: 5px;
          padding: 0.75rem;
          font-size: 1.1rem;
          font-family: Menlo, Monaco, Lucida Console, Liberation Mono,
            DejaVu Sans Mono, Bitstream Vera Sans Mono, Courier New, monospace;
        }
      `}</style>
      <style jsx global>{`
        html,
        body {
          padding: 0;
          margin: 0;
          font-family: -apple-system, BlinkMacSystemFont, Segoe UI, Roboto,
            Oxygen, Ubuntu, Cantarell, Fira Sans, Droid Sans, Helvetica Neue,
            sans-serif;
        }
        * {
          box-sizing: border-box;
        }
      `}</style>
    </div>
  );
}
import Head from "next/head";
import styles from "../styles/Home.module.css";
import React from "react";
import { useForm } from "react-hook-form";

export default function Home() {
  const { register, handleSubmit, formState: { errors } } = useForm();

  // Handle form submission to generate PDF
  const onSubmit = (data) => {
    generatePdf(data);
  };

  // Function to generate PDF by calling the backend API
  const generatePdf = async (data) => {
    try {
      const response = await fetch(`/api/pdf-html?f=${data["firstName"]}&l=${data["lastName"]}&e=${data["email"]}`);
      const blob = await response.blob();
      const url = window.URL.createObjectURL(new Blob([blob]));
      const link = document.createElement("a");
      link.href = url;
      link.setAttribute("download", "awesomeIron.pdf");
      document.body.appendChild(link);
      link.click();
      link.parentNode.removeChild(link);
    } catch (error) {
      console.error("Error generating PDF:", error);
    }
  };

  return (
    <div className={styles.container}>
      <Head>
        <title>Generate PDF Using IronPDF</title>
        <link rel="icon" href="/favicon.ico" />
      </Head>
      <main>
        <h1>Demo React Hook Form and Generate PDF Using IronPDF</h1>
        <form onSubmit={handleSubmit(onSubmit)}>
          <div>
            <label>First Name</label>
            <input {...register("firstName", { required: true })} />
            {errors.firstName && <span>This field is required</span>}
          </div>
          <div>
            <label>Last Name</label>
            <input {...register("lastName", { required: true })} />
            {errors.lastName && <span>This field is required</span>}
          </div>
          <div>
            <label>Email</label>
            <input {...register("email", { required: true, pattern: /^[a-z0-9._%+-]+@[a-z0-9.-]+\.[a-z]{2,4}$/ })} />
            {errors.email && <span>Invalid email address</span>}
          </div>
          <button type="submit">Submit and Generate PDF</button>
        </form>
      </main>
      <style jsx>{`
        main {
          padding: 5rem 0;
          flex: 1;
          display: flex;
          flex-direction: column;
          justify-content: center;
          align-items: center;
        }
        footer {
          width: 100%;
          height: 100px;
          border-top: 1px solid #eaeaea;
          display: flex;
          justify-content: center;
          align-items: center;
        }
        footer img {
          margin-left: 0.5rem;
        }
        footer a {
          display: flex;
          justify-content: center;
          align-items: center;
          text-decoration: none;
          color: inherit;
        }
        code {
          background: #fafafa;
          border-radius: 5px;
          padding: 0.75rem;
          font-size: 1.1rem;
          font-family: Menlo, Monaco, Lucida Console, Liberation Mono,
            DejaVu Sans Mono, Bitstream Vera Sans Mono, Courier New, monospace;
        }
      `}</style>
      <style jsx global>{`
        html,
        body {
          padding: 0;
          margin: 0;
          font-family: -apple-system, BlinkMacSystemFont, Segoe UI, Roboto,
            Oxygen, Ubuntu, Cantarell, Fira Sans, Droid Sans, Helvetica Neue,
            sans-serif;
        }
        * {
          box-sizing: border-box;
        }
      `}</style>
    </div>
  );
}
JAVASCRIPT

代码解释

  1. 创建一个React表单视图，使用React Hook Form库接收名字、姓氏和邮箱。
  2. 创建一个API以接受用户输入并使用IronPDF库生成PDF。
  3. 在index.js文件中，当用户点击提交按钮时，"生成PDF"按钮会调用后端API生成PDF。

输出

PDF

react hook form NPM（开发者指南）：图5 - PDF输出

IronPDF 许可证

IronPDF npm包依赖每个用户的许可证密钥运行。 IronPDF提供免费试用许可证以便用户在购买前查看其广泛的功能。

在使用IronPDF程序包之前，将许可证密钥放在这里：

import { IronPdfGlobalConfig, PdfDocument } from "@ironsoftware/ironpdf";
// Apply your IronPDF license key
IronPdfGlobalConfig.getConfig().licenseKey = "Add Your key here";
import { IronPdfGlobalConfig, PdfDocument } from "@ironsoftware/ironpdf";
// Apply your IronPDF license key
IronPdfGlobalConfig.getConfig().licenseKey = "Add Your key here";
JAVASCRIPT

结论

React Hook Form是一个多功能且高效的库，用于在React中处理表单。 它的简单性、性能和灵活性使其成为管理简单和复杂表单的绝佳选择。 无论你是在构建小项目还是大型应用，React Hook Form都能帮助你轻松管理表单。 IronPDF是.NET开发者需要以编程方式处理PDF文档的可靠解决方案。 IronPDF的丰富功能集简化了PDF集成到.NET应用中的过程，包括从多个格式创建PDF、合并及编辑、提供安全选项、表单创建及格式转换。 其用户友好的API和多功能性使其成为在开发项目中高效管理PDF任务的有价值工具。

Darrius Serrant
Darrius Serrant
  立即与工程团队聊天
全栈软件工程师（WebOps）

Darrius Serrant 拥有迈阿密大学的计算机科学学士学位，目前在 Iron Software 担任全栈 WebOps 市场工程师。从小就被编码吸引，他认为计算机既神秘又易于接触，使其成为创意和问题解决的理想媒介。

在 Iron Software，Darrius 喜欢创造新事物，并简化复杂概念以使其更易理解。作为我们常驻的开发者之一，他还自愿教授学生，与下一代分享他的专业知识。

对于 Darrius 来说，他的工作令人满意，因为它被重视并产生真正的影响。

相关文章

30天试用 → 完整产品。无限制。无卡。 免费试用