Cannot find module 'core-js/…' even though @babel/polyfill is installed












1















We are using padStart.



To support earlier version of Node we are using babel and its @babel/preset-env preset:



[
"@babel/preset-env",
{
targets: {
node: "6.11.5"
},
// Support padStart et cetera
useBuiltIns: "usage"
}
]


useBuiltIns automatically brings in the padStart polyfill.



This works when we include core-js in our dependencies. This doesn't work when we include only @babel/polyfill in our dependencies. This is the error message on deploy to Google Firebase Functions:




Cannot find module 'core-js/modules/es7.string.pad-start'




That message goes away when we explicitly install core-js.



Why do we need to include core-js explicitly when @babel/polyfill includes it?



This is how we installed @babel/polyfill and core-js.



npm install @babel/polyfill --save
npm install core-js --save









share|improve this question




















  • 1





    Seems related to this note

    – bigless
    Nov 28 '18 at 0:04











  • It does indeed @bigless. Nice find.

    – Shaun Luttin
    Nov 28 '18 at 0:16
















1















We are using padStart.



To support earlier version of Node we are using babel and its @babel/preset-env preset:



[
"@babel/preset-env",
{
targets: {
node: "6.11.5"
},
// Support padStart et cetera
useBuiltIns: "usage"
}
]


useBuiltIns automatically brings in the padStart polyfill.



This works when we include core-js in our dependencies. This doesn't work when we include only @babel/polyfill in our dependencies. This is the error message on deploy to Google Firebase Functions:




Cannot find module 'core-js/modules/es7.string.pad-start'




That message goes away when we explicitly install core-js.



Why do we need to include core-js explicitly when @babel/polyfill includes it?



This is how we installed @babel/polyfill and core-js.



npm install @babel/polyfill --save
npm install core-js --save









share|improve this question




















  • 1





    Seems related to this note

    – bigless
    Nov 28 '18 at 0:04











  • It does indeed @bigless. Nice find.

    – Shaun Luttin
    Nov 28 '18 at 0:16














1












1








1


1






We are using padStart.



To support earlier version of Node we are using babel and its @babel/preset-env preset:



[
"@babel/preset-env",
{
targets: {
node: "6.11.5"
},
// Support padStart et cetera
useBuiltIns: "usage"
}
]


useBuiltIns automatically brings in the padStart polyfill.



This works when we include core-js in our dependencies. This doesn't work when we include only @babel/polyfill in our dependencies. This is the error message on deploy to Google Firebase Functions:




Cannot find module 'core-js/modules/es7.string.pad-start'




That message goes away when we explicitly install core-js.



Why do we need to include core-js explicitly when @babel/polyfill includes it?



This is how we installed @babel/polyfill and core-js.



npm install @babel/polyfill --save
npm install core-js --save









share|improve this question
















We are using padStart.



To support earlier version of Node we are using babel and its @babel/preset-env preset:



[
"@babel/preset-env",
{
targets: {
node: "6.11.5"
},
// Support padStart et cetera
useBuiltIns: "usage"
}
]


useBuiltIns automatically brings in the padStart polyfill.



This works when we include core-js in our dependencies. This doesn't work when we include only @babel/polyfill in our dependencies. This is the error message on deploy to Google Firebase Functions:




Cannot find module 'core-js/modules/es7.string.pad-start'




That message goes away when we explicitly install core-js.



Why do we need to include core-js explicitly when @babel/polyfill includes it?



This is how we installed @babel/polyfill and core-js.



npm install @babel/polyfill --save
npm install core-js --save






javascript node.js google-cloud-functions babel babel-polyfill






share|improve this question















share|improve this question













share|improve this question




share|improve this question








edited Nov 27 '18 at 23:24







Shaun Luttin

















asked Nov 27 '18 at 23:09









Shaun LuttinShaun Luttin

61.3k34233292




61.3k34233292








  • 1





    Seems related to this note

    – bigless
    Nov 28 '18 at 0:04











  • It does indeed @bigless. Nice find.

    – Shaun Luttin
    Nov 28 '18 at 0:16














  • 1





    Seems related to this note

    – bigless
    Nov 28 '18 at 0:04











  • It does indeed @bigless. Nice find.

    – Shaun Luttin
    Nov 28 '18 at 0:16








1




1





Seems related to this note

– bigless
Nov 28 '18 at 0:04





Seems related to this note

– bigless
Nov 28 '18 at 0:04













It does indeed @bigless. Nice find.

– Shaun Luttin
Nov 28 '18 at 0:16





It does indeed @bigless. Nice find.

– Shaun Luttin
Nov 28 '18 at 0:16












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