Events may be lost when Use in React + Electron + Webpack

[zhangxuyang950313]

Describe the bug

A clear and concise description of what the bug is.

Versions (please complete the following information):

• Chokidar version 3.5.2
• Node version v12.8.3
• OS version: MacOS 11.4

To Reproduce:

Steps to reproduce the behavior. Include filename and chokidar config.

Ideally prove a problem by isolating and making it reproducible with a very short sample program, which you could paste here:

const chokidar = require('chokidar');
const fs = require('fs');
// One-liner for files and directories starting with 'test'
chokidar.watch('test*', {})
.on('add', (event, path) => {
  console.log(event, path);
})
.on("unlink", (event, path) => {
 console.log(event, path)
});
fs.writeFileSync('test.txt', 'testing 1');
// In a comment describe expected output versus observed problem
The same code above, in React + Electron could be lost events, but in node it could not

Most valuable could be one or more test cases for test.js to demonstrate the problem.

Expected behavior A clear and concise description of what you expect to happen.

Additional context Add any other context about the problem here. Optionally nice to know what project you are working on.

[davidliudev]

i seem to run into similar issues above. is this ticket being investigated since it has been a full year since this ticket was last updated

[davidliudev]

i could provide more information on my end:

when I introduced 100ms delay between chokidar.watch using setTimeout and async await, then the file will not be missed.

It seems that when you add a watcher and then create a file immediately after too quickly, the event will always be lost in React+Electron environment.

[davidliudev]

And this also only shows up in electron+react and works normally in nodejs.

i initially suspect that there are hidden async call inside watcher setup codes that does not await properly. but if so then I don't know why it only shows in electron but not in nodejs.

[davidliudev]

Chokidar version 3.5.3 "electron": "^19.0.11", "react": "^18.1.0", macos: 12.3.1