hello.js source file is mangled, being overridden and growing in size due to webpack

[bomzj]

In fresh vue cli 4 hello.js is constantly being overridden with transpiled/minfied version and its size grows all the time since running npm run server command.

Version: webpack 4.43.0
Time: 8378ms
Built at: 06/06/2020 11:32:01 PM
   Asset     Size  Chunks             Chunk Names
hello.js  262 KiB       0  [emitted]  hello
Entrypoint hello = hello.js
[74] C:/Projects/cryptofair/node_modules/core-js/modules/es.regexp.exec.js 186 bytes {0} [built]
[79] ./hello.js 425 KiB {0} [built]
[80] C:/Projects/cryptofair/node_modules/core-js/modules/es.symbol.js 12.8 KiB {0} [built]
[85] C:/Projects/cryptofair/node_modules/core-js/modules/es.symbol.description.js 2.08 KiB {0} [built]
[86] C:/Projects/cryptofair/node_modules/core-js/modules/es.symbol.iterator.js 208 bytes {0} [built]
[87] C:/Projects/cryptofair/node_modules/core-js/modules/es.symbol.to-string-tag.js 217 bytes {0} [built]
[88] C:/Projects/cryptofair/node_modules/core-js/modules/es.array.concat.js 2.34 KiB {0} [built]
[90] C:/Projects/cryptofair/node_modules/core-js/modules/es.array.for-each.js 300 bytes {0} [built]
[91] C:/Projects/cryptofair/node_modules/core-js/modules/es.array.index-of.js 973 bytes {0} [built]
[92] C:/Projects/cryptofair/node_modules/core-js/modules/es.array.is-array.js 228 bytes {0} [built]
[93] C:/Projects/cryptofair/node_modules/core-js/modules/es.array.join.js 686 bytes {0} [built]
[94] C:/Projects/cryptofair/node_modules/core-js/modules/es.array.slice.js 2.13 KiB {0} [built]
[95] C:/Projects/cryptofair/node_modules/core-js/modules/es.date.to-string.js 605 bytes {0} [built]
[96] C:/Projects/cryptofair/node_modules/core-js/modules/es.function.bind.js 248 bytes {0} [built]
[98] C:/Projects/cryptofair/node_modules/core-js/modules/es.function.name.js 680 bytes {0} [built]
    + 114 hidden modules
Hash: ac69718c4df8bcdfb6f3
Version: webpack 4.43.0
Time: 9244ms
Built at: 06/06/2020 11:32:11 PM
   Asset     Size  Chunks             Chunk Names
hello.js  298 KiB       0  [emitted]  hello
Entrypoint hello = hello.js
[74] C:/Projects/cryptofair/node_modules/core-js/modules/es.regexp.exec.js 186 bytes {0} [built]
[79] ./hello.js 506 KiB {0} [built]
[80] C:/Projects/cryptofair/node_modules/core-js/modules/es.symbol.js 12.8 KiB {0} [built]
[85] C:/Projects/cryptofair/node_modules/core-js/modules/es.symbol.description.js 2.08 KiB {0} [built]
[86] C:/Projects/cryptofair/node_modules/core-js/modules/es.symbol.iterator.js 208 bytes {0} [built]
[87] C:/Projects/cryptofair/node_modules/core-js/modules/es.symbol.to-string-tag.js 217 bytes {0} [built]
[88] C:/Projects/cryptofair/node_modules/core-js/modules/es.array.concat.js 2.34 KiB {0} [built]
[90] C:/Projects/cryptofair/node_modules/core-js/modules/es.array.for-each.js 300 bytes {0} [built]
[91] C:/Projects/cryptofair/node_modules/core-js/modules/es.array.index-of.js 973 bytes {0} [built]
[92] C:/Projects/cryptofair/node_modules/core-js/modules/es.array.is-array.js 228 bytes {0} [built]
[93] C:/Projects/cryptofair/node_modules/core-js/modules/es.array.join.js 686 bytes {0} [built]
[94] C:/Projects/cryptofair/node_modules/core-js/modules/es.array.slice.js 2.13 KiB {0} [built]
[95] C:/Projects/cryptofair/node_modules/core-js/modules/es.date.to-string.js 605 bytes {0} [built]
[96] C:/Projects/cryptofair/node_modules/core-js/modules/es.function.bind.js 248 bytes {0} [built]
[98] C:/Projects/cryptofair/node_modules/core-js/modules/es.function.name.js 680 bytes {0} [built]
    + 114 hidden modules
Hash: 88e661aca53285e31615
Version: webpack 4.43.0
Time: 10290ms
Built at: 06/06/2020 11:32:21 PM
   Asset     Size  Chunks             Chunk Names
hello.js  333 KiB       0  [emitted]  hello
Entrypoint hello = hello.js
[74] C:/Projects/cryptofair/node_modules/core-js/modules/es.regexp.exec.js 186 bytes {0} [built]
[79] ./hello.js 591 KiB {0} [built]
[80] C:/Projects/cryptofair/node_modules/core-js/modules/es.symbol.js 12.8 KiB {0} [built]
[85] C:/Projects/cryptofair/node_modules/core-js/modules/es.symbol.description.js 2.08 KiB {0} [built]
[86] C:/Projects/cryptofair/node_modules/core-js/modules/es.symbol.iterator.js 208 bytes {0} [built]
[87] C:/Projects/cryptofair/node_modules/core-js/modules/es.symbol.to-string-tag.js 217 bytes {0} [built]
[88] C:/Projects/cryptofair/node_modules/core-js/modules/es.array.concat.js 2.34 KiB {0} [built]
[90] C:/Projects/cryptofair/node_modules/core-js/modules/es.array.for-each.js 300 bytes {0} [built]
[91] C:/Projects/cryptofair/node_modules/core-js/modules/es.array.index-of.js 973 bytes {0} [built]
[92] C:/Projects/cryptofair/node_modules/core-js/modules/es.array.is-array.js 228 bytes {0} [built]
[93] C:/Projects/cryptofair/node_modules/core-js/modules/es.array.join.js 686 bytes {0} [built]
[94] C:/Projects/cryptofair/node_modules/core-js/modules/es.array.slice.js 2.13 KiB {0} [built]
[95] C:/Projects/cryptofair/node_modules/core-js/modules/es.date.to-string.js 605 bytes {0} [built]
[96] C:/Projects/cryptofair/node_modules/core-js/modules/es.function.bind.js 248 bytes {0} [built]
[98] C:/Projects/cryptofair/node_modules/core-js/modules/es.function.name.js 680 bytes {0} [built]
    + 114 hidden modules

This is a part of hello.js just to see how it changes after npm run serve

!function(t,n){for(var r in n)t[r]=n[r]}(exports,function(t){var n={};function r(e){if(n[e])return n[e].exports;var o=n[e]={i:e,l:!1,exports:{}};return t[e].call(o.exports,o,o.exports,r),o.l=!0,o.exports}return r.m=t,r.c=n,r.d=function(t,n,e){r.o(t,n)||Object.defineProperty(t,n,{enumerable:!0,get:e})},r.r=function(t){"undefined"!=typeof Symbol&&Symbol.toStringTag&&Object.defineProperty(t,Symbol.toStringTag,{value:"Module"}),Object.defineProperty(t,"__esModule",{value:!0})},r.t=function(t,n){if(1&n&&(t=r(t)),8&n)return t;if(4&n&&"object"==typeof t&&t&&t.__esModule)return t;var e=Object.create(null);if(r.r(e),Object.defineProperty(e,"default",{enumerable:!0,value:t}),2&n&&"string"!=typeof t)for(var o in t)r.d(e,o,function(n){return t[n]}.bind(null,o));return e},r.n=function(t){var n=t&&t.__esModule?function(){return t.default}:function(){return t};return r.d(n,"a",n),n},r.o=function(t,n){return Object.prototype.hasOwnProperty.call(t,n)},r.p="",r(r.s=79)}([function(t,n){t.exports=function(t){try{return!!t()}catch(t){return!0}}},function(t,n,r){var e=r(3),o=r(21).f,i=r(9),u=r(11),c=r(32),a=r(55),f=r(61);t.exports=function(t,n){var r,s,l,p,v,g=t.target,d=t.global,y=t.stat;if(r=d?e:y?e[g]||c(g,{}):(e[g]||{}).prototype)for(s in n){if(p=n[s],l=t.noTargetGet?(v=o(r,s))&&v.value:r[s],!f(d?s:g+(y?".":"#")+s,t.forced)&&void 0!==l){if

[bomzj]

Ok I found, I did override functions parameter in netlify.toml to 'src/lambda' instead of default 'lambda'. After I return it back everything started working.