我使用gulp任务来缩小css和js文件,但是每次打开gulp时都会遇到此错误。我搜索了任何解决方案,但仍然没有找出问题所在。
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抛出错误; ^ AssertionError [ERR_ASSERTION]:任务 必须指定功能 在Gulp.set [as _setTask](c:\ wamp64 \ www \ gulp_p \ node_modules \ undertaker \ lib \ set-task.js:10:3) 在Gulp.task(c:\ wamp64 \ www \ gulp_p \ node_modules \ undertaker \ lib \ task.js:13:8) 在对象。 (c:\ wamp64 \ www \ gulp_p \ gulpfile.js:64:6) 在Module._compile(internal / modules / cjs / loader.js:956:30) 在Object.Module._extensions..js(内部/模块/cjs/loader.js:973:10) 在Module.load(internal / modules / cjs / loader.js:812:32) 在Function.Module._load(内部/模块/cjs/loader.js:724:14) 在Module.require(internal / modules / cjs / loader.js:849:19) 在要求时(内部/模块/cjs/helpers.js:74:18) 执行时(C:\ Users \ alia \ AppData \ Roaming \ npm \ node_modules \ gulp-cli \ lib \ versioned \ ^ 4.0.0 \ index.js:36:18) { generateMessage:否, 代码:“ ERR_ASSERTION”, 实际:错误, 预期:是的, 运算符:'=='}
我的安装
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": ""
}
gulpfiles.js 我在其他计算机上使用它时,它正在工作。因此,gulpfile.js没有错误,它位于项目的根目录
'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']);