node.js Gulp-autoprefixer 抛出 ReferenceError：未定义承诺

Gulp-autoprefixer throwing ReferenceError: Promise is not defined

提问by Matei

I try to make a gulp compile my sass then autoprefixit with gulp-autoprefixerbut i'm getting an error.

我尝试让 gulp 编译我的 sass 然后使用 autoprefixitgulp-autoprefixer但我收到一个错误。

var gulp = require('gulp'),
    sass = require('gulp-sass'),
    autoprefixer = require('gulp-autoprefixer');

gulp.task('test', function(){
    gulp.src('_sass/main.sass')
        .pipe(sass())
        .pipe(autoprefixer()) 
        .pipe(gulp.dest('./assets/css')); 
});

I'm trying to run this Gulpfile.jsand i'm using :

我正在尝试运行它Gulpfile.js并且我正在使用：

"gulp": "~3.9.0",
"gulp-sass": "~2.0.4",
"gulp-autoprefixer": "~3.0.1",

and NPM version 1.3.10

和 NPM 版本 1.3.10

When i run gulp testi get this :

当我跑步时，gulp test我得到了这个：

/home/matei/Tests/test-4/node_modules/gulp-autoprefixer/node_modules/postcss/lib/lazy-result.js:152
        this.processing = new Promise(function (resolve, reject) {
                              ^
ReferenceError: Promise is not defined
    at LazyResult.async (/home/matei/Tests/test-4/node_modules/gulp-autoprefixer/node_modules/postcss/lib/lazy-result.js:152:31)
    at LazyResult.then (/home/matei/Tests/test-4/node_modules/gulp-autoprefixer/node_modules/postcss/lib/lazy-result.js:75:21)
    at DestroyableTransform._transform (/home/matei/Tests/test-4/node_modules/gulp-autoprefixer/index.js:28:13)
    at DestroyableTransform.Transform._read (/home/matei/Tests/test-4/node_modules/gulp-autoprefixer/node_modules/through2/node_modules/readable-stream/lib/_stream_transform.js:172:10)
    at DestroyableTransform.Transform._write (/home/matei/Tests/test-4/node_modules/gulp-autoprefixer/node_modules/through2/node_modules/readable-stream/lib/_stream_transform.js:160:12)
    at doWrite (/home/matei/Tests/test-4/node_modules/gulp-autoprefixer/node_modules/through2/node_modules/readable-stream/lib/_stream_writable.js:326:12)
    at writeOrBuffer (/home/matei/Tests/test-4/node_modules/gulp-autoprefixer/node_modules/through2/node_modules/readable-stream/lib/_stream_writable.js:312:5)
    at DestroyableTransform.Writable.write (/home/matei/Tests/test-4/node_modules/gulp-autoprefixer/node_modules/through2/node_modules/readable-stream/lib/_stream_writable.js:239:11)
    at write (/home/matei/Tests/test-4/node_modules/gulp-sass/node_modules/through2/node_modules/readable-stream/lib/_stream_readable.js:623:24)
    at flow (/home/matei/Tests/test-4/node_modules/gulp-sass/node_modules/through2/node_modules/readable-stream/lib/_stream_readable.js:632:7)

I don't really know what i'm doing wrong. Is not working when i use sass or plain css. I think is something with my files.

我真的不知道我做错了什么。当我使用 sass 或普通 css 时不起作用。我认为我的文件有问题。

采纳答案by Matei

I updated node.js to the latest version using :

我使用以下命令将 node.js 更新到最新版本：

# Using Ubuntu
curl -sL https://deb.nodesource.com/setup_4.x | sudo -E bash -
sudo apt-get install -y nodejs

for my Ubuntu machine, as shown here.

对于我的Ubuntu的机器，如图所示这里。

After that i updated NPM using :

之后，我使用以下方法更新了 NPM：

sudo npm cache clean -f
sudo npm install -g n
sudo n stable

As shown here.

如图所示这里。

Now the gulp-autoprefixerstart working but i got an error from gulp-sass. I updated it using this instruction :

现在gulp-autoprefixer开始工作，但我从gulp-sass. 我使用以下说明更新了它：

1. Delete your node_modules folder
2. Remove gulp-sass from your package.json file
3. Remove node-sass from your package.json file (if you have it in there)
4. Run npm install gulp-sass --save-dev
5. Update your Gulp task as required

1. 删除您的 node_modules 文件夹
2. 从 package.json 文件中删除 gulp-sass
3. 从 package.json 文件中删除 node-sass（如果你有的话）
4. 运行 npm install gulp-sass --save-dev
5. 根据需要更新您的 Gulp 任务

Found here.Now i have "gulp-sass": "^2.0.4"and this fixed all my problems.

在这里找到。现在我有了"gulp-sass": "^2.0.4"，这解决了我所有的问题。

Thanks for advice and help.

感谢您的建议和帮助。

回答by Chris Searles

Had the same issue. For me, updating node didn't work but adding this at the very beginning of my gulpfile did:

有同样的问题。对我来说，更新节点不起作用，但在我的 gulpfile 的最开始添加它做了：

require('es6-promise').polyfill();

回答by Hari Gillala

Install es6-promise in ur project location where package.json exists

在 package.json 所在的项目位置安装 es6-promise

npm install es6-promise

Then make the first line of your gulpfile.js be the following code:

然后让你的 gulpfile.js 的第一行代码如下：

var Promise = require('es6-promise').Promise;

回答by stitakis

This does not answer the question directly but it might be useful for people that get this error when trying to run the ionic 2 tutorial.

这不会直接回答问题，但对于在尝试运行 ionic 2 教程时遇到此错误的人来说可能很有用。

As pointed by other answers the problem is that es6-promiseis missing.

正如其他答案所指出的那样，问题在于es6-promise缺少。

I got the same error when trying to start the ionic 2 tutorial (https://github.com/driftyco/ionic2-starter-tutorial): (my ionic 2 version is 2.0.0-beta.25 and latest tutorial commit is ed9ef2fcce887e4d1c08c375c849b06b8394bad7)

我在尝试启动 ionic 2 教程（https://github.com/driftyco/ionic2-starter-tutorial）时遇到了同样的错误：（我的 ionic 2 版本是 2.0.0-beta.25，最新的教程提交是 ed9ef2fcce887e4d1c08c375c849b06b8394bad7 )

This is the stack trace I got when trying to run the app with ionic serve:

这是我在尝试使用以下命令运行应用程序时得到的堆栈跟踪ionic serve：

Running 'serve:before' gulp task before serve
[18:37:00] Starting 'clean'...
[18:37:01] Finished 'clean' after 1.02 s
[18:37:01] Starting 'watch'...
[18:37:01] Starting 'sass'...
[18:37:01] Starting 'html'...
[18:37:01] Starting 'fonts'...
[18:37:01] Starting 'scripts'...
[18:37:01] Finished 'scripts' after 62 ms
[18:37:01] Finished 'html' after 72 ms
[18:37:01] Finished 'fonts' after 77 ms
Caught exception:
 ReferenceError: Promise is not defined
    at LazyResult.async (/home/stitakis/dev/playground/ionic2/myTutorial/node_modules/ionic-gulp-sass-build/node_modules/gulp-autoprefixer/node_modules/postcss/lib/lazy-result.js:157:31)
    at LazyResult.then (/home/stitakis/dev/playground/ionic2/myTutorial/node_modules/ionic-gulp-sass-build/node_modules/gulp-autoprefixer/node_modules/postcss/lib/lazy-result.js:79:21)
    at DestroyableTransform._transform (/home/stitakis/dev/playground/ionic2/myTutorial/node_modules/ionic-gulp-sass-build/node_modules/gulp-autoprefixer/index.js:24:6)
    at DestroyableTransform.Transform._read (/home/stitakis/dev/playground/ionic2/myTutorial/node_modules/ionic-gulp-sass-build/node_modules/gulp-autoprefixer/node_modules/through2/node_modules/readable-stream/lib/_stream_transform.js:159:10)
    at DestroyableTransform.Transform._write (/home/stitakis/dev/playground/ionic2/myTutorial/node_modules/ionic-gulp-sass-build/node_modules/gulp-autoprefixer/node_modules/through2/node_modules/readable-stream/lib/_stream_transform.js:147:83)
    at doWrite (/home/stitakis/dev/playground/ionic2/myTutorial/node_modules/ionic-gulp-sass-build/node_modules/gulp-autoprefixer/node_modules/through2/node_modules/readable-stream/lib/_stream_writable.js:313:64)
    at writeOrBuffer (/home/stitakis/dev/playground/ionic2/myTutorial/node_modules/ionic-gulp-sass-build/node_modules/gulp-autoprefixer/node_modules/through2/node_modules/readable-stream/lib/_stream_writable.js:302:5)
    at DestroyableTransform.Writable.write (/home/stitakis/dev/playground/ionic2/myTutorial/node_modules/ionic-gulp-sass-build/node_modules/gulp-autoprefixer/node_modules/through2/node_modules/readable-stream/lib/_stream_writable.js:241:11)
    at DestroyableTransform.ondata (/home/stitakis/dev/playground/ionic2/myTutorial/node_modules/ionic-gulp-sass-build/node_modules/gulp-sass/node_modules/through2/node_modules/readable-stream/lib/_stream_readable.js:531:20)
    at DestroyableTransform.EventEmitter.emit (events.js:95:17) 

Again, as pointed by other answers, this is how to solve this:

同样，正如其他答案所指出的，这是解决此问题的方法：

1. edit gulpfile.js and add in line 6: require('es6-promise').polyfill();

2. install the missing dependency with: npm install es6-promise --save

1. 编辑 gulpfile.js 并在第 6 行添加： require('es6-promise').polyfill();

2. 安装缺少的依赖项： npm install es6-promise --save

After this changes, the problem was fixed and I was able to start the local server.

更改后，问题得到解决，我能够启动本地服务器。