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watch

Utilities for watching file trees.

  • 1.0.2
  • latest
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  • npm
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Version published
Weekly downloads
1.8M
decreased by-15.1%
Maintainers
3
Weekly downloads
 
Created

What is watch?

The 'watch' npm package is a utility that allows you to monitor files and directories for changes. It can be used to trigger actions when files are modified, added, or deleted, making it useful for tasks such as automated testing, live reloading, and continuous integration.

What are watch's main functionalities?

Watch a single file

This feature allows you to watch a single file for changes. When the file is modified, the callback function is triggered.

const watch = require('watch');

watch.watchFile('/path/to/file', function (curr, prev) {
  console.log('File changed');
});

Watch a directory

This feature allows you to watch a directory and its subdirectories for changes. The callback function is triggered when files are added, removed, or modified.

const watch = require('watch');

watch.watchTree('/path/to/dir', function (f, curr, prev) {
  if (typeof f == 'object' && prev === null && curr === null) {
    console.log('Finished walking the tree');
  } else if (prev === null) {
    console.log('New file added: ' + f);
  } else if (curr.nlink === 0) {
    console.log('File removed: ' + f);
  } else {
    console.log('File changed: ' + f);
  }
});

Ignore specific files or directories

This feature allows you to ignore specific files or directories while watching. In this example, dot files and the 'node_modules' directory are ignored.

const watch = require('watch');

watch.watchTree('/path/to/dir', {
  ignoreDotFiles: true,
  filter: function (f, stat) {
    return !/node_modules/.test(f);
  }
}, function (f, curr, prev) {
  console.log('File changed: ' + f);
});

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Package last updated on 17 Feb 2017

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