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This feature is non-standard and is not on a standards track. Do not use it on production sites facing the Web: it will not work for every user. There may also be large incompatibilities between implementations and the behavior may change in the future.
open method returns a
LockedFile object that allows to safely write in the file.
var myFile = instanceOfFileHandle.open(mode);
- A string that specifies the writing mode for the file. It can be
|FileSystem API||Editor's Draft||Draft proposal|