Use deep Locutus imports for browser bundle size

[kvz]

It was reported to me that

The bundled twig.min.js file from this project is 300KB, half of which is from locutus.

Decided to lend a hand.

Summary

• replace Locutus category-index imports in src/twig.lib.js with per-function deep imports
• keep the runtime surface identical while letting webpack include only the 9 helpers Twig actually uses

Why

Twig currently imports Locutus like this:

• locutus/php/strings/index
• locutus/php/math/index
• locutus/php/datetime/index
• locutus/php/var/index

That pulls much more of Locutus into the browser bundle than Twig actually needs.

With this change, the locally built artifacts changed from:

• twig.min.js: 241560 bytes -> 111095 bytes
• twig.js: 723397 bytes -> 291023 bytes

Related

Locutus-side follow-up: locutusjs/locutus#576

[RobLoach]

This is a great idea, thanks