Welcome to the Treehouse Community

The Treehouse Community is a meeting place for developers, designers, and programmers of all backgrounds and skill levels to get support. Collaborate here on code errors or bugs that you need feedback on, or asking for an extra set of eyes on your latest project. Join thousands of Treehouse students and alumni in the community today. (Note: Only Treehouse students can comment or ask questions, but non-students are welcome to browse our conversations.)

Looking to learn something new?

Treehouse offers a seven day free trial for new students. Get access to thousands of hours of content and a supportive community. Start your free trial today.

JavaScript

Lisa Crandall
Lisa Crandall
3,409 Points
Posted by Lisa Crandall
Lisa Crandall
3,409 Points

Default Gulp task outputs errors.

When I run gulp as a command I get the following errors:

assert.js:351
    throw err;
    ^

AssertionError [ERR_ASSERTION]: Task function must be specified
    at Gulp.set [as _setTask] (/Users/lisacrandall/Downloads/Stage1Video3/node_modules/undertaker/lib/set-task.js:10:3)
    at Gulp.task (/Users/lisacrandall/Downloads/Stage1Video3/node_modules/undertaker/lib/task.js:13:8)
    at Object.<anonymous> (/Users/lisacrandall/Downloads/Stage1Video3/gulpfile.js:10:6)
    at Module._compile (internal/modules/cjs/loader.js:721:30)
    at Object.Module._extensions..js (internal/modules/cjs/loader.js:732:10)
    at Module.load (internal/modules/cjs/loader.js:620:32)
    at tryModuleLoad (internal/modules/cjs/loader.js:560:12)
    at Function.Module._load (internal/modules/cjs/loader.js:552:3)
    at Module.require (internal/modules/cjs/loader.js:657:17)
    at require (internal/modules/cjs/helpers.js:22:18)

My code looks like this:

'use strict';

var gulp = require('gulp');

gulp.task("hello", function(done) {
    console.log("Hello!");
    done();
});

gulp.task("default", ["hello"], function() {
    console.log("This is the default task!");
});

Any help would be appreciated.

1 Answer

Dragosh Craciun
Dragosh Craciun
7,874 Points
Dragosh Craciun
Dragosh Craciun
7,874 Points

Gulp 4.0 has changed the way that tasks should be defined if the task depends on another task to execute. The list parameter has been deprecated.

Instead of the list parameter they have introduced gulp.series() and gulp.parallel().

https://github.com/gulpjs/gulp/blob/master/docs/recipes/running-tasks-in-series.md