How to generate this time format? 2018-06-05T19:55:29.000+0800

how is this time format generated? "2018-06-05T19:55:29.000+0800"
currently only knows that (new Date ()). ToISOString () can generate "2018-06-22T08:41:09.093Z", but I don"t know what to do with the above format

Mar.23,2021
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