Sometimes we have to know whether a file exists or not. To do this we’ll be using a node.js fs module. We could check synchronously by using and asynchronously with Here is an example
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const fs = require('fs') // asynchronous fs.stat(`${__dirname}/model`, (err, stats) => { if(stats.isFile()){ console.log('file'); } else if (stats.isDirectory()) { console.log('directory'); } else { console.log('others'); } }) // synchronous if (fs.lstatSync(`${__dirname}/package.json`).isFile()){ console.log('file'); } if (fs.statSync(`${__dirname}/node_modules`).isDirectory()){ console.log('directory'); } |
one more example »
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// check file or directory existance in async an sync way const fs = require('fs') // sync if (fs.statSync(`${__dirname}/package.json`).isFile()) { console.log('sync: file'); } if (fs.statSync(`${__dirname}/.`).isDirectory()) { console.log('sync: directory'); } // async fs.stat(`${__dirname}/package.json`, (err, stats) => { if (err) throw err if (stats.isFile()) { console.log('async: file'); } }) fs.stat(`${__dirname}/.`, (err, stat) => { if (err) throw err if (stat.isDirectory) { console.log('async: directory'); } }) |
We can check different thing with next functions
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stats.isFile() stats.isDirectory() stats.isBlockDevice() stats.isCharacterDevice() stats.isSymbolicLink() (only valid with fs.lstat()) stats.isFIFO() stats.isSocket() |
Here is a link on the…
