在vs代码中打开项目时未检测到吞咽任务

Question

我使用GROP任务来缩小css和js文件，但是每次打开GROP都会出现这个错误。我寻找任何解决办法，但仍然没有找到问题。

Gulp任务：命令失败：Gulp--Tasks simple--cwd“c:\wamp64\www\Gulp_p”--gulpfile“c:\wamp64\www\Gulp_p\gulpfile.js”assert.js:374 throw err；^AssertionError[ERR_ASSERTION]：任务函数必须在Gulp.Task（c:\wamp64\www\Gulp_p\node_modules\undertaker\lib\set Task.js:10:3）的Gulp.Task（c:\wamp64\www\Gulp\node_modules\undertaker\lib\Task.js:13:8）的Gulp.set[as _setTask]中指定。（c:\wamp64\www\gulp\p\gulpfile.js:64:6）at Module.编译（internal/modules/cjs/loader.js:956:30）at Object.Module.\u extensions..js（internal/modules/cjs/loader.js:973:10）at Module.load（internal/modules/cjs/loader.js:812:32）at Function/Module.require（internal/modules/cjs/cjs/loader.js:724:14）at modules:849:19）at require（internal/modules/cjs/helpers.js:74:18）at execute（C:\Users\alia\AppData\Roaming\npm\node\u modules\gulp cli\lib\versions\^4.0.0\index.js:36:18）{generatedMessage:false，code:'ERR_断言'，实际值：false，预期值：true，运算符：'='='}

我的装置

gulp --version => CLI version: 2.2.0  -  Local version: 4.0.2
node --version => v12.13.0
npm --version => 6.12.0
npx --version => 6.12.0

package.json

{
  "name": "gulp_p",
  "version": "1.0.0",
  "main": "gulpfile.js",
  "dependencies": {
    "gulp": "^4.0.2",
    "gulp-clean": "^0.4.0",
    "gulp-clean-css": "^3.10.0",
    "gulp-concat": "^2.6.1",
    "gulp-concat-css": "^3.1.0",
    "gulp-inject": "^4.3.2",
    "gulp-install": "^1.1.0",
    "gulp-minify": "^3.1.0",
    "gulp-minify-css": "^1.2.4",
    "gulp-prompt": "^1.1.0",
    "gulp-requirejs": "^1.2.0",
    "gulp-watch": "^5.0.1"
  },
  "devDependencies": {},
  "scripts": {
    "test": "echo \"Error: no test specified\" && exit 1"
  },
  "author": "",
  "license": "ISC",
  "description": ""
}

当我在不同的计算机上使用它时，gulpfiles.js正在工作。因此gulpfile.js没有错误，它位于项目的根目录下

'use strict';

var gulp = require('gulp');

var prompt = require('gulp-prompt');
var log = require('fancy-log');
var concatCss = require('gulp-concat-css');
var minifyCSS = require('gulp-minify-css');
var cleanCSS = require('gulp-clean-css');

var concat = require('gulp-concat');
var minify = require('gulp-minify');
var clean = require('gulp-clean');

var watch = require('gulp-watch');

var theme_input='sunstar';

gulp.task('css', function() {
    var importFrom = require('gulp/themes/'+theme_input+'.js');
    return gulp.src(importFrom.css_arr,{base: '.'})
      .pipe(concatCss(importFrom.destination_css))
      .pipe(minifyCSS({keepSpecialComments: 0}))
      .pipe(gulp.dest('.'));
  });

gulp.task('scripts', function() {
    var importFrom = require('gulp/themes/'+theme_input+'.js');
    return gulp.src(importFrom.js_arr)
      .pipe(concat(importFrom.destination_js))
      .pipe(minify({keepSpecialComments: 0}))
      .pipe(gulp.dest('.'));
  });


gulp.task('choose', function(){
    log('Please enter THEME name, then type of task [js/css].');
    return gulp.src('*')
    .pipe(prompt.prompt([{
        type: 'input',
        name: 'theme_input',
        message: 'Please enter THEME name?'
    },{
        type: 'input',
        name: 'task',
        message: 'Please enter task Type?'
    }], function(res){
        theme_input = res.theme_input;
        var importFrom = require('gulp/themes/'+theme_input+'.js');
        if(res.task == 'css'){
            gulp.src(importFrom.css_arr,{base: '.'})
            .pipe(concatCss(importFrom.destination_css))
            .pipe(minifyCSS({keepSpecialComments: 0}))
            .pipe(gulp.dest('.'));
        }else if(res.task == 'js'){
            gulp.src(importFrom.js_arr)
            .pipe(concat(importFrom.destination_js))
            .pipe(minify({keepSpecialComments: 0}))
            .pipe(gulp.dest('.'));
        }
    }));
});

gulp.task('default',['choose','css','scripts']);

Answer 1

由于您使用的是gulp v4，因此此代码将不起作用：

gulp.task（默认，选择，css，脚本）；

将其更改为：

gulp.task（默认，gulp.series（选择，css，脚本）；

另一台工作的计算机必须使用gulp v3。