3 Merge multiple streams into one stream in sequence or parallel.
5 [![NPM version][npm-image]][npm-url]
6 [![Build Status][travis-image]][travis-url]
7 [![Downloads][downloads-image]][downloads-url]
11 Install with [npm](https://npmjs.org/package/merge2)
20 const gulp = require('gulp')
21 const merge2 = require('merge2')
22 const concat = require('gulp-concat')
23 const minifyHtml = require('gulp-minify-html')
24 const ngtemplate = require('gulp-ngtemplate')
26 gulp.task('app-js', function () {
28 gulp.src('static/src/tpl/*.html')
29 .pipe(minifyHtml({empty: true}))
31 module: 'genTemplates',
35 'static/src/js/app.js',
36 'static/src/js/locale_zh-cn.js',
37 'static/src/js/router.js',
38 'static/src/js/tools.js',
39 'static/src/js/services.js',
40 'static/src/js/filters.js',
41 'static/src/js/directives.js',
42 'static/src/js/controllers.js'
45 .pipe(concat('app.js'))
46 .pipe(gulp.dest('static/dist/js/'))
51 const stream = merge2([stream1, stream2], stream3, {end: false})
53 stream.add(stream4, stream5)
59 // equal to merge2([stream1, stream2], stream3)
60 const stream = merge2()
61 stream.add([stream1, stream2])
67 // 1. merge `stream1`;
68 // 2. merge `stream2` and `stream3` in parallel after `stream1` merged;
69 // 3. merge 'stream4' after `stream2` and `stream3` merged;
70 const stream = merge2(stream1, [stream2, stream3], stream4)
73 // 1. merge `stream5` and `stream6` in parallel after `stream4` merged;
74 // 2. merge 'stream7' after `stream5` and `stream6` merged;
75 stream.add([stream5, stream6], stream7)
80 // equal to merge2(stream1, stream2, stream6, stream3, [stream4, stream5]);
81 const streamA = merge2(stream1, stream2)
82 const streamB = merge2(stream3, [stream4, stream5])
83 const stream = merge2(streamA, streamB)
90 const merge2 = require('merge2')
97 ### merge2(stream1, stream2, ..., streamN)
99 ### merge2(stream1, stream2, ..., streamN, options)
101 ### merge2(stream1, [stream2, stream3, ...], streamN, options)
103 return a duplex stream (mergedStream). streams in array will be merged in parallel.
105 ### mergedStream.add(stream)
107 ### mergedStream.add(stream1, [stream2, stream3, ...], ...)
109 return the mergedStream.
111 ### mergedStream.on('queueDrain', function() {})
113 It will emit 'queueDrain' when all streams merged. If you set `end === false` in options, this event give you a notice that should add more streams to merge or end the mergedStream.
118 Type: `Readable` or `Duplex` or `Transform` stream.
125 * **end** - `Boolean` - if `end === false` then mergedStream will not be auto ended, you should end by yourself. **Default:** `undefined`
127 * **pipeError** - `Boolean` - if `pipeError === true` then mergedStream will emit `error` event from source streams. **Default:** `undefined`
129 * **objectMode** - `Boolean` . **Default:** `true`
131 `objectMode` and other options(`highWaterMark`, `defaultEncoding` ...) is same as Node.js `Stream`.
135 MIT © [Teambition](https://www.teambition.com)
137 [npm-url]: https://npmjs.org/package/merge2
138 [npm-image]: http://img.shields.io/npm/v/merge2.svg
140 [travis-url]: https://travis-ci.org/teambition/merge2
141 [travis-image]: http://img.shields.io/travis/teambition/merge2.svg
143 [downloads-url]: https://npmjs.org/package/merge2
144 [downloads-image]: http://img.shields.io/npm/dm/merge2.svg?style=flat-square