Next.js

Add a complete CSV and Excel importer to your Next.js app, with column mapping, real-time validation, and API integration built in.

Installation

Install both packages:

1npm install @importok/javascript @importok/react

Note: The trial version is available on NPM. When you upgrade, you'll get access to our private packages with full features. No code changes required.

Your first importer

Create a basic contact importer:

 1import dynamic from 'next/dynamic';
 2 
 3const ImportokWizard = dynamic(() => import('@importok/react'), {
 4  ssr: false
 5});
 6 
 7export default function Home() {
 8  // Define the fields you want to import
 9  const fields = {
10    first_name: { label: 'First Name' },
11    last_name: { label: 'Last Name' },
12    email: { label: 'Email' },
13    phone: { label: 'Phone' },
14    country: { label: 'Country' }
15  };
16 
17  return (
18    <div className="App">
19      <ImportokWizard
20        title="Import Contacts"
21        fields={fields}
22      />
23    </div>
24  );
25}

That's it. Users can now upload CSV or Excel files and map columns to your fields.

Make it production-ready

Add data transformations

Clean up data before validation using transformers:

 1const fields = {
 2  first_name: {
 3    label: 'First Name',
 4    transformers: 'trim|capitalize'  // Built-in transformers
 5  },
 6  last_name: {
 7    label: 'Last Name',
 8    transformers: 'trim|capitalize'
 9  },
10  email: {
11    label: 'Email',
12    transformers: 'trim'
13  }
14};

See all built-in transformers →

Add validation rules

Catch errors before they reach your API using validators:

 1const fields = {
 2  first_name: {
 3    label: 'First Name',
 4    transformers: 'trim|capitalize'
 5  },
 6  last_name: {
 7    label: 'Last Name',
 8    transformers: 'trim|capitalize',
 9    validators: 'required'  // Built-in validators
10  },
11  email: {
12    label: 'Email',
13    transformers: 'trim',
14    validators: 'email|required'
15  }
16};

See all built-in validators →

Connect to your API

Send validated data to your backend:

 1export default function Home() {
 2  const fields = { /* ... */ };
 3 
 4  const handleImport = async function (records, meta) {
 5    const response = await fetch('/api/contacts/imports', {
 6      method: 'POST',
 7      headers: { 'Content-Type': 'application/json' },
 8      body: JSON.stringify(records)
 9    });
10 
11    return response;
12  };
13 
14  return (
15    <ImportokWizard
16      title="Import Contacts"
17      fields={fields}
18      onImportReady={handleImport}
19    />
20  );
21}

Complete example

Here's everything together:

 1import dynamic from 'next/dynamic';
 2 
 3const ImportokWizard = dynamic(() => import('@importok/react'), {
 4  ssr: false
 5});
 6 
 7export default function Home() {
 8  const fields = {
 9    first_name: {
10      label: 'First Name',
11      transformers: 'trim|capitalize'
12    },
13    last_name: {
14      label: 'Last Name',
15      transformers: 'trim|capitalize',
16      validators: 'required'
17    },
18    email: {
19      label: 'Email',
20      transformers: 'trim',
21      validators: 'email|required'
22    },
23    phone: {
24      label: 'Phone',
25      transformers: 'trim'
26    },
27    country: {
28      label: 'Country',
29      transformers: 'trim',
30      validators: 'in:countries'
31    }
32  };
33 
34  const handleImport = async function (records, meta) {
35    return await fetch('/api/contacts/imports', {
36      method: 'POST',
37      headers: { 'Content-Type': 'application/json' },
38      body: JSON.stringify(records)
39    });
40  };
41 
42  return (
43    <div className="App">
44      <ImportokWizard
45        title="Import Contacts"
46        fields={fields}
47        onImportReady={handleImport}
48      />
49    </div>
50  );
51}

Next steps

Now that you have a working importer, explore advanced features:

• Custom validators - Add business-specific validation rules
• Custom transformers - Create domain-specific data cleanup
• Data providers - Connect dropdowns to your API
• Props & events - Customize behavior and styling
• Field configuration - Deep dive into field options

Try it live

Experiment with a complete example in StackBlitz: Open in StackBlitz →

Trial limitations

The free trial includes:

• ✅ Full UI and mapping features
• ✅ Built-in validators and transformers
• ⚠️ 20 records per import (unlimited on paid plans)
• ⚠️ Up to 2 custom validators (unlimited on paid plans)
• ⚠️ Up to 2 custom transformers (unlimited on paid plans)
• ⚠️ Up to 2 data providers (unlimited on paid plans)

When you're ready, upgrade to unlock full features with access to our private packages.