nodejs自动热加载文件的做法

　　https://stackoverflow.com/questions/1972242/how-to-auto-reload-files-in-node-js

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14down vote

If somebody still comes to this question and wants to solve it using only the standard modules I made a simple example:

复制代码var process = require('process'); var cp = require('child_process'); var fs = require('fs'); var server = cp.fork('server.js'); console.log('Server started'); fs.watchFile('server.js', function (event, filename) { server.kill(); console.log('Server stopped'); server = cp.fork('server.js'); console.log('Server started'); }); process.on('SIGINT', function () { server.kill(); fs.unwatchFile('server.js'); process.exit(); });

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var process = require('process'); var cp = require('child_process'); var fs = require('fs'); var server = cp.fork('server.js'); console.log('Server started'); fs.watchFile('server.js', function (event, filename) { server.kill(); console.log('Server stopped'); server = cp.fork('server.js'); console.log('Server started'); }); process.on('SIGINT', function () { server.kill(); fs.unwatchFile('server.js'); process.exit(); });

This example is only for one file (server.js), but can be adapted to multiple files using an array of files, a for loop to get all file names, or by watching a directory:

复制代码fs.watch('./', function (event, filename) { // sub directory changes are not seen console.log(`restart server`); server.kill(); server = cp.fork('server.js'); })

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fs.watch('./', function (event, filename) { // sub directory changes are not seen console.log(`restart server`); server.kill(); server = cp.fork('server.js'); })

This code was made for Node.js 0.8 API, it is not adapted for some specific needs but will work in some simple apps