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A simple yet powerful library to effortlessly export any data into XLSX sheets, with the full power of type-safety and awesome DX

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ChronicStone/typed-xlsx

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typed-xlsx

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Export any data into xls/xlsx files effortlessly, while benefiting from great type-safety & developper experience.

Key Features :

  • 🛠 Type-safe Schema Builder: Design your spreadsheet schema with strong typing for enhanced reliability and developer experience.

  • 🔄 Type-safe Data Serialization & Transformation: Ensure data integrity through type-safe serialization and transformation functionalities.

  • 🔧 Shared Type-safe Custom Value Pre-processors: Utilize shared pre-processors for consistent value transformaiton

  • 🧮 Column Summary : Auto-insert computed column summaries for efficient data analysis and overview.

  • 🧩 Complex Row Structures with Auto-Merging: Implement advanced row layouts with sub-rows for automatic row merging / styling for seamless data organization and display.

  • 🎯 Easy Default Values Management: Manage default values effortlessly, ensuring your data is presented exactly as you intend.

  • 📊 Dynamic Column Selection: Selectively choose which columns of the schema to use when building a table

  • 🗺️ Dynamic Column Mapping with Type-safe Context: Map columns dynamically with a type-safe context, injected when building sheet

  • 🎨 Dynamic Cell Styling/Formatting: Customize cell styling and formatting dynamically per-row with ease

  • 📑 Multi-sheet Support: Create spreadsheets with multiple sheets

  • 🏗️ Multiple Tables Per Sheet Support: Include as many tables you need inside a same sheet

  • 🌐 Linear or Grid-like Layout for Sheets with Multiple Tables: Choose between linear or grid layouts for sheets

INSTALLATION

pnpm add @chronicstone/typed-xlsx

USAGE EXAMPLE

1. Define the type of exported data (Or infer it from a function / a db query, or wherever you want) :

interface Organization { id: number name: string } interface User { id: number firstName: string lastName: string email: string roles: string[] organizations: Organization[] results: { general: { overall: number } technical: { overall: number } interview?: { overall: number } } }

2. Build a sheet schema :

import { ExcelSchemaBuilder } from '@chronicstone/typed-xlsx' // OPTIONAL : DEFINE SHARED TRANSFORMERS THAT CAN BE USE TO TRANSFORM VALUE INSERTED INTO A CELL const transformers = { boolean: (value: boolean) => value ? 'Yes' : 'No', list: (value: (string)[]) => value.join(', '), arrayLength: (value: any[]) => value.length, } satisfies TransformersMap // Use the schema builder to define your sheet schema const userExportSchema = ExcelSchemaBuilder .create<User>() .withTransformers(transformers) .column('id', { key: 'id', summary: [{ value: () => 'TOTAL BEFORE VAT' }, { value: () => 'TOTAL' }], }) .column('firstName', { key: 'firstName' }) .column('lastName', { key: 'lastName' }) .column('email', { key: 'email' }) .column('roles', { key: 'roles', transform: 'list', cellStyle: data => ({ font: { color: { rgb: data.roles.includes('admin') ? 'd10808' : undefined } } }), }) .column('balance', { key: 'balance', format: '"$"#,##0.00_);\\("$"#,##0.00\\)', summary: [ { value: data => data.reduce((acc, user) => acc + user.balance, 0), format: '"$"#,##0.00_);\\("$"#,##0.00\\)', }, { value: data => data.reduce((acc, user) => acc + user.balance, 0) * 1.2, format: '"$"#,##0.00_);\\("$"#,##0.00\\)', }, ], }) .column('nbOrgs', { key: 'organizations', transform: 'arrayLength' }) .column('orgs', { key: 'organizations', transform: org => org.map(org => org.name).join(', ') }) .column('generalScore', { key: 'results.general.overall', format: '# / 10', summary: [{ value: data => data.reduce((acc, user) => acc + user.results.general.overall, 0) / data.length, format: '# / 10', }], }) .column('technicalScore', { key: 'results.technical.overall', summary: [{ value: data => data.reduce((acc, user) => acc + user.results.technical.overall, 0) / data.length, }], }) .column('interviewScore', { key: 'results.interview.overall', default: 'N/A' }) .column('createdAt', { key: 'createdAt', format: 'd mmm yyyy' }) .group('group:org', (builder, context: Organization[]) => { for (const org of context) { builder .column(`orga-${org.id}`, { label: `User in ${org.name}`, key: 'organizations', transform: orgs => orgs.some(o => o.id === org.id) ? 'YES' : 'NO', cellStyle: data => ({ font: { color: { rgb: data.organizations.some(o => o.id === org.id) ? '61eb34' : 'd10808' }, }, }), }) } }) .build()

3. Safely compose excel file from schemas

import { ExcelBuilder } from '@chronicstone/typed-xlsx' const buffer = ExcelBuilder .create() .sheet('Users - full') .addTable({ data: users, schema: assessmentExport, context: { 'group:org': organizations, }, }) .sheet('Users - partial') .addTable({ data: users, schema: assessmentExport, select: { firstName: true, lastName: true, email: true, }, }) .sheet('User - neg partial') .addTable({ data: users, schema: assessmentExport, select: { firstName: false, lastName: false, email: false, }, context: { 'group:org': organizations, }, }) .sheet('User - Multiple tables') .sheet('Multi-tables-grid', { tablesPerRow: 2 }) .addTable({ title: 'Table 1', data: users.filter((_, i) => i < 5), schema: assessmentExport, select: { firstName: true, lastName: true, email: true, createdAt: true }, }) .addTable({ title: 'Table 2', data: users.filter((_, i) => i < 5), schema: assessmentExport, select: { firstName: true, lastName: true, email: true, balance: true }, }) .addTable({ title: 'Table 3', data: users.filter((_, i) => i < 5), schema: assessmentExport, select: { firstName: true, lastName: true, email: true, balance: true }, }) .addTable({ title: 'Table 4', data: users.filter((_, i) => i < 5), schema: assessmentExport, select: { firstName: true, lastName: true, email: true, createdAt: true }, }) .build({ output: 'buffer' }) fs.writeFileSync('test.xlsx', arrayBuffer)

4. Have fun

Here's the generated file for the example from above

DOWNLOAD GENERATED EXAMPLE

OPEN EXAMPLE IN STACKBLITZ

License

MIT License © 2023-PRESENT Cyprien THAO

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A simple yet powerful library to effortlessly export any data into XLSX sheets, with the full power of type-safety and awesome DX

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