gulp-watch 
File watcher, that uses super-fast chokidar and emits vinyl objects.
Run npm install gulp-watch.
var gulp = require('gulp'),
watch = require('gulp-watch');
gulp.task('default', function () {
watch('css/**/*.css')
.pipe(gulp.dest('./build/'));
});Protip: until gulpjs 4.0 is released, you can use gulp-plumber to prevent stops on errors.
More examples can be found in docs/readme.md.
Creates watcher that will spy on files that were matched by glob which can be a
node-glob string or array of strings.
Returns pass through stream, that will emit vinyl files
(with additional event property) that corresponds to event on file-system.
This function is called, when some events is happens on file-system.
All incoming files that piped in will be grouped and passed to events stream as is.
vinyl— is vinyl object that corresponds to file that caused event. Additionaleventfield is added to determine, what caused changes.
Possible events:
add- file was added to watch or createdchange- file was changedunlink- file was deleted
This object is passed to chokidar options directly. Options for gulp.src are also available. If you do not want content from watch, then add read: false to the options object.
Type: Array
Default: ['add', 'change', 'unlink']
List of events, that should be watched by gulp-watch. Contains event names from chokidar.
Type: String
Default: undefined
Use explicit base path for files from glob. Read more about base and cwd in gulpjs docs.
Type: String
Default: undefined
Name of the watcher. If it present in options, you will get more readable output.
Type: Boolean
Default: false
This options will enable verbose output.
Returned Stream from constructor have some useful methods:
add(path / paths)unwatch(path / paths)close()
endreadyerror
MIT (c) 2014 Vsevolod Strukchinsky ([email protected])