Should I precache workbox own files (copiedLibraries) for making webapp full offline

Question

Do app require workbox libaries to be precached or cached, since it precache size increases to ~4MB from ~2MB(which is not good I guess).

workbox-config.js

module.exports = {
"globDirectory":"build/",
"globPatterns":[
    "**/*.{json,ico,png,jpg,html,js,css}",
],
"globIgnores":[
    "workbox-v5.1.2/*",
    "sw.js"
],
"swDest":"build/sw.js",
"swSrc":"src/sw.js",

}

Answer 1

You are not required to precache any resources that are fetched/imported (via fetch or importScripts) by the service worker itself. This non-requirement does not apply to asynchronous imports.

Only exception is Workbox Window.

In other words, if you're not using Workbox Window, then you can safely leave the line "workbox-v5.1.2/*" in the "globIgnores", otherwise, something like this would cache Workbox Window only:

module.exports = {
"globDirectory":"build/",
"globPatterns":[
    "**/*.{json,ico,png,jpg,html,js,css}",
],
"globIgnores":[
    "workbox-v5.1.2/workbox-!(window)*",
    "sw.js"
],
"swDest":"build/sw.js",
"swSrc":"src/sw.js",

}