問題描述

以下是我的 gulpfile.js.里面還有幾個任務，一切都運行良好 - 但最后一個任務，watch 沒有.

Following is my gulpfile.js. There are a couple of more tasks in it and all are working fine - but the last task, watch doesn't.

我已經嘗試了所有可能的路徑和文件組合，但我仍然沒有運氣.我在這里閱讀了很多關于此的答案，但無法解決我的問題.我嘗試在需要和不需要 gulp-watch 的情況下運行 gulp.watch，嘗試了幾種不同的方法來設置任務等等......

I've tried every possible combination of paths and files and what so ever, but still I don't have luck. I've read many answers on this here, but couldn't solve my problem. I tried to run gulp.watch with and without requiring gulp-watch, tried several different approaches on how to set up the task and so on and so on...

var gulp = require('gulp');
var browserify = require('browserify');
var babelify = require('babelify');
var source = require('vinyl-source-stream');
var watch = require('gulp-watch');

gulp.task('application', function() {
    return browserify('./public/resources/jsx/application.js')
        .transform(babelify, { stage: 0 })
        .bundle()
        .on('error', function(e){
            console.log(e.message);

            this.emit('end');
        })
        .pipe(source('appBundle.js'))
        .pipe(gulp.dest('./public/resources/jsx'));
});

gulp.task('watch', function() {
    gulp.watch('./public/resources/jsx/project/*.js',['application'])
});

有人可以提出解決方案嗎?

Can someone suggest a solution?

這是控制臺輸出:

michael@michael-desktop:/opt/PhpstormProjects/app_april_2015$ gulp watch
[23:05:03] Using gulpfile /opt/PhpstormProjects/app_april_2015/gulpfile.js
[23:05:03] Starting 'watch'...
[23:05:03] Finished 'watch' after 13 ms

推薦答案

你應該return觀看:

gulp.task('watch', function() {
    return gulp.watch('./public/resources/jsx/project/*.js',['application'])
});

watch 是一個 async 方法，所以 Gulp 知道某事正在發生的唯一方法是如果你返回一個 promise，它會監視可以.

watch is an async method, so the only way Gulp can know that something is happening is if you return a promise, which watch does.

編輯

正如@JMM 所說，watch 不會返回 Promise.它返回一個 EventEmitter.

As @JMM stated, watch doesn't return a Promise. It returns an EventEmitter.

這篇關于gulp watch 不看的文章就介紹到這了，希望我們推薦的答案對大家有所幫助，也希望大家多多支持html5模板網！