0.1.0 • Published 5 years ago
build-if.macro v0.1.0
build-if.macro
This is a babel macro that lets you test a predicate at build-time, leaving the unused branch out of your runtime code, and pruning away any imports that were used only by the unused branch.
For example, this:
import buildIf from 'build-if.macro';
console.log(buildIf(true, () => 'hello', () => 'goodbye'));
Compiles to:
console.log('hello');
You will often want to use this in conjunction with a macro like preval
to compute the predicate:
import preval from 'babel-plugin-preval/macro';
import buildIf from 'build-if.macro';
const DEBUG_MODE = preval`module.exports = Boolean(process.env.ENABLE_DEBUG)`;
function doTheWork(opt) {
// ...
buildIf(DEBUG_MODE, () => {
console.log("some debugging info");
});
// ...
}
0.1.0
5 years ago