fsevents 不是构造函数

Question

Starting the development server...

/Users/puneetrangrass/Documents/react/react-practice/node_modules/chokidar/lib/fsevents-handler.js:28
return (new fsevents(path)).on('fsevent', callback).start();
^
TypeError: fsevents is not a constructor
at createFSEventsInstance (/Users/puneetrangrass/Documents/react/react-practice/node_modules/chokidar/lib/fsevents-handler.js:28:11)
at setFSEventsListener (/Users/puneetrangrass/Documents/react/react-practice/node_modules/chokidar/lib/fsevents-handler.js:82:16)
at FSWatcher.FsEventsHandler._watchWithFsEvents (/Users/puneetrangrass/Documents/react/react-practice/node_modules/chokidar/lib/fsevents-handler.js:252:16)
at FSWatcher. (/Users/puneetrangrass/Documents/react/react-practice/node_modules/chokidar/lib/fsevents-handler.js:386:25)
at LOOP (fs.js:1570:14)
at process._tickCallback (internal/process/next_tick.js:61:11)
npm ERR! code ELIFECYCLE
npm ERR! errno 1
npm ERR! react-practice@0.1.0 start: react-scripts start
npm ERR! Exit status 1
npm ERR!
npm ERR! Failed at the react-practice@0.1.0 start script.
npm ERR! This is probably not a problem with npm. There is likely additional logging output above.

npm ERR! A complete log of this run can be found in:
npm ERR! /Users/puneetrangrass/.npm/_logs/2019-07-13T05_06_50_503Z-debug.log
puneets-MacBook-Pro:react-practice puneetrangrass$ node --v
node: bad option: --v
puneets-MacBook-Pro:react-practice puneetrangrass$ node -v
v10.16.0
puneets-MacBook-Pro:react-practice puneetrangrass$

in my machine

node : v10.16.0 npm : 6.9.0

while executing " npm start " in react app. how can i resolve the issue?

Answer 1

Do the following if you still have the issue.

1. Remove node_modules folder and any lock files ( package.lock ) and package-lock.json . Basically your project folder should have only package.json and src folder (Can have .git and Readme.md, but they're not relevant here).

rm -rf node_modules

rm -rf package-lock.json

---

2. Install yarn if you don't have it already.

If you already have npm, then it is as easy as

npm install -g yarn

Otherwise use this link to install Yarn .

---

3. Navigate to your project folder and type

yarn install

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4. Run npm start to start your project. Then you should see no more of these errors. If you still see them, run npm cache clean --force and start it again.

Currently the issue which you are getting is mainly due to chokidar.

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I used this github thread to solve as given by ravibagul91 .

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Answer 2

I had the same=> TypeError: fsevents is not a constructor

Solution: Inside any created project that has not been ejected, run:

npm install --save --save-exact react-scripts@3.0.1

or

yarn add --exact react-scripts@3.0.1

Reference: https://github.com/facebook/create-react-app/releases/tag/v3.0.1