Is --drop intended to only work with builtins? --drop does not remove a function I created myself.

[fredrik-hjarner]

Regarding --drop paramater. Documentation:

You can use --drop to remove function calls from your JavaScript bundle. This is useful if you want to remove debug code from your production bundle. For example, if you pass --drop=console, all calls to console.log will be removed from your code.

I was experimenting with --drop trying to remove a "debug-only" function, but noticed that "custom" functions will not be removed.

Is --drop intended to work only with/for builtins?

index.ts:

function test() {
    throw new Error("test");
}
test();
console.log("Hello via Bun!");
Bun.sleep(1000);
window.alert("Hello via Bun!");

cmd:
bun build index.ts --drop="console" --drop="test" --drop="Bun" --drop="window"

output:

// index.ts
function test() {
  throw new Error("test");
}
test();

[ericchase]

i too would like to know. i've tested this thoroughly and haven't found a way to get bun to drop anything that is actually defined, which seems to make the feature only marginally useful