fs.watch fired twice when I change the watched file
The fs.watch api:
- is unstable
- has known "behaviour" with regards repeated notifications. Specifically, the windows case being a result of windows design, where a single file modification can be multiple calls to the windows API
I suggest to work with chokidar (https://github.com/paulmillr/chokidar) which is much better than fs.watch:
Commenting its README.md:
Node.js fs.watch:
- Doesn't report filenames on OS X.
- Doesn't report events at all when using editors like Sublime on OS X.
- Often reports events twice.
- Emits most changes as
rename. - Has a lot of other issues
- Does not provide an easy way to recursively watch file trees.
Node.js fs.watchFile:
- Almost as bad at event handling.
- Also does not provide any recursive watching.
- Results in high CPU utilization.