why change UMD global structure

[jasonChen1982]

i upgrade rollup from 0.36.4 to 0.51.2, and my library can't work as before.
when i use this umd-bundle , the new bundle had cover the XXX object which i defined before.

i want this UMD structure for global

(factory((global.XXX = global.XXX || {})));

but got following in new rollup, and it overwrite my window.XXX = {...} or same-series lib export the same name XXX.

(factory((global.XXX = {})));

[lukastaegert]

Maybe Rollup’s extend option is what you are looking for? We just updated the documentation with a little more information https://rollupjs.org/#advanced-functionality

[jasonChen1982]

which extend option ? i can't find this config ~

my problem is, how to do the UMD bundle work with same name-space. not include an external-lib.

i suggest to keep following compatibility writing

(factory((global.XXX = global.XXX || {})));

[lukastaegert]

This one:

[jasonChen1982]

bravo

[adrianheine]

Can this be closed?