Because Parcel wasn't already fast enough.
Fully supports ECMAScript module syntax (import/export) in addition to CommonJS require(<string>).
How do I get it? · How do I use it? · Does it do source maps? · Modules? · What are the options? · Is it fast?
> cargo install parcelIf you don't have cargo, install it with https://rustup.rs.
// index.js:
const itt = require('itt')
const math = require('./math')
console.log(itt.range(10).map(math.square).join(' '))
// math.js:
exports.square = x => x * x> parcel index.js parcel.jsAnd then node parcel.js or <script src=parcel.js> to your heart's content.
Of course!
# parcel.js and parcel.js.map
> parcel index.js parcel.js
# parcel.js with inline map
> parcel --map-inline index.js parcel.js
# parcel.js with no source map
> parcel index.js >parcel.js
# or
> parcel --no-map index.js parcel.jsThat's technically not a question. But yes.
// index.mjs
import itt from 'itt'
import { square, cube } from './math'
console.log(itt.range(10).map(square).join(' '))
console.log(itt.range(10).map(cube).join(' '))
// math.mjs
export const square = x => x * x, cube = x => x * x * x> parcel -e index.mjs parcel.js
If you need your modules to be in .js files for some reason, use -E (--es-syntax-everywhere) instead of -e (--es-syntax).
> parcel --help
parcel v0.0.1
Usage:
parcel [options] <input> [output]
parcel [-h | --help]
Options:
-i, --input <input>
Use <input> as the main module.
-o, --output <output>
Write bundle to <output> and source map to <output>.map.
Default: '-' for stdout.
-m, --map <map>
Output source map to <map>.
-I, --map-inline
Output source map inline as data: URI.
-M, --no-map
Suppress source map output when it would normally be implied.
-w, --watch
Watch for changes to <input> and its dependencies.
-e, --es-syntax
Support .mjs files with ECMAScript module syntax:
import itt from 'itt'
export const greeting = 'Hello, world!'
Instead of CommonJS require syntax:
const itt = require('itt')
exports.greeting = 'Hello, world!'
.mjs (ESM) files can import .js (CJS) files, in which case the
namespace object has a single `default` binding which reflects the
value of `module.exports`. CJS files can require ESM files, in which
case the resultant object is the namespace object.
-E, --es-syntax-everywhere
Implies --es-syntax. Allow ECMAScript module syntax in .js files.
CJS-style `require()` calls are also allowed.
-h, --help
Print this message.
Umm…
Yes.
> time browserify index.js >browserify.js
real 0m0.225s
user 0m0.197s
sys 0m0.031s
> time node fuse-box.js
real 0m0.373s
user 0m0.324s
sys 0m0.051s
> time prcl index.js >parcel.js
real 0m0.077s
user 0m0.059s
sys 0m0.017s
> time parcel-redux index.js >parcel.js
real 0m0.010s
user 0m0.005s
sys 0m0.006s
# on a larger project
> time browserify src/api-download.js >browserify.js
real 0m2.385s
user 0m2.459s
sys 0m0.416s
> time prcl src/api-download.js >parcel.js
real 0m0.204s
user 0m0.187s
sys 0m0.083s
> time parcel-redux src/api-download.js >parcel.js
real 0m0.037s
user 0m0.071s
sys 0m0.019s
# want source maps?
> time browserify -d src/api-download.js -o bundle.js
real 0m3.142s
user 0m3.060s
sys 0m0.483s
> time prcl src/api-download.js parcel.js
real 0m0.315s
user 0m0.281s
sys 0m0.100s
> time parcel-redux src/api-download.js parcel.js
real 0m0.046s
user 0m0.077s
sys 0m0.026s
# realtime!
> parcel-redux -w examples/simple bundle.js
ready in 2 ms
generate bundle.js in 2 ms
generate bundle.js in 2 ms
generate bundle.js in 1 ms
generate bundle.js in 2 ms
generate bundle.js in 1 ms
generate bundle.js in 3 ms
^C
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