My typescript project tends to have its code scattered across multiple files during development.
Is there a recommended method for packaging this project into a single js and d.ts file for distribution?
My typescript project tends to have its code scattered across multiple files during development.
Is there a recommended method for packaging this project into a single js and d.ts file for distribution?
When preparing your file for packaging, it is typically unnecessary to consolidate it into a single file. Utilizing a package manager like NPM will bundle your files into a package that can be kept private or made public, containing all the necessary files to execute your module.
Specifically with TypeScript, you should package the .js and .d.ts files to ensure compatibility with both TypeScript and JavaScript users. The .ts files should not be included in the package.
If you are targeting both browser and Node environments, utilizing UMD modules is recommended as they function in both environments.
For example, consider TypeSpec.
Please be aware - the complete files are included below for context, but the crucial information usually resides in just one or two lines, which are highlighted.
The TypeScript config file is critical for specifying the "module" type and whether to emit "declaration" files.
{
"compileOnSave": true,
"compilerOptions": {
"target": "ES5",
"module": "umd", // <--
"strict": true,
"experimentalDecorators": true,
"noEmitOnError": false,
"noFallthroughCasesInSwitch": true,
"noImplicitReturns": true,
"sourceMap": true,
"removeComments": false,
"declaration": true, // <--
"downlevelIteration": true,
"noUnusedLocals": true,
"noUnusedParameters": false
}
}
The Gulp file assists in transferring files to a dist folder, including the package.json and readme files, along with all the JavaScript and type definitions.
var gulp = require('gulp');
gulp.task('default', function () {
gulp.src('./node_modules/requirejs/require.js')
.pipe(gulp.dest('./lib'));
// This section moves type definitions
gulp.src('./Scripts/TypeSpec/*.d.ts')
.pipe(gulp.dest('./dist/src'));
// And this section moves the JavaScript files
gulp.src('./Scripts/TypeSpec/*.js')
.pipe(gulp.dest('./dist/src'));
gulp.src('../README.md')
.pipe(gulp.dest('./dist'));
gulp.src('./package.json')
.pipe(gulp.dest('./dist'));
});
The package.json file specifies the main source file and type information locations in the "main" and "types" sections:
{
"author": "Steve Fenton",
"name": "typespec-bdd",
"description": "BDD framework for TypeScript.",
"keywords": [
"typespec",
"typescript",
"bdd",
"behaviour",
"driven"
],
"version": "0.7.1",
"homepage": "https://github.com/Steve-Fenton/TypeSpec",
"bugs": "https://github.com/Steve-Fenton/TypeSpec/issues",
"license": "(Apache-2.0)",
"files": [
"src/"
],
"repository": {
"url": "https://github.com/Steve-Fenton/TypeSpec"
},
"main": "./src/TypeSpec.js", <-- main file
"types": "./src/TypeSpec.d.ts", <-- type information starts here
"dependencies": {},
"devDependencies": {
"gulp": "^3.9.1",
"requirejs": "^2.3.5"
},
"optionalDependencies": {},
"engines": {
"node": "*"
}
}
A "dist" folder is now available with only the necessary files for packaging. You can test it without publishing to NPM using:
npm pack
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