Duration format result for SSS

[awenger63]

Describe the bug (see #1521 all issues aren't close !)
When use duration format for an ISO8601, result it's not as expected :
myDuration = dayjs.duration('PT3M39.096S')
myDuration.format("SSS") => "undefined"

Expected behavior
myDuration.format("SSS") => "096"

Information

• Day.js Version [1.10.7]
• OS: [Windows]
• Browser [all]

[adroste]

Same here. Dayjs is not able to parse the floating point format correctly. "39.096S" results in seconds: 39.096 but it should be seconds: 39, milliseconds: 96. @iamkun

Follow-up: As stated here #1521 (comment)

dayjs.duration('PT3M39.096S').add(0, 'seconds').format('HH:mm:ss')

is a workaround at the moment and fixes the broken instance.