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JavaScript Gulp Basics Gulp your JavaScript Workflow Using Third Party Gulp Libraries

Posted by ammarkhan
.a{fill-rule:evenodd;}techdegree
ammarkhan
Front End Web Development Techdegree Student 21,661 Points

unable to compile and run task

After i run gulp concatScripts i got this long message, don't know what to make of it.

C:\wamp\www\sandbox>gulp concatScripts Using gulpfile C:\wamp\www\sandbox\gulpfile.js Starting 'concatScripts'... 'concatScripts' errored after 9.76 ms TypeError: Cannot read property 'on' of undefined at DestroyableTransform.Readable.pipe (C:\wamp\www\sandbox\node_modules\viny l-fs\node_modules\readable-stream\lib_stream_readable.js:516:7) at Gulp.<anonymous> (C:\wamp\www\sandbox\gulpfile.js:12:4) at module.exports (C:\wamp\www\sandbox\node_modules\orchestrator\lib\runTask .js:34:7) at Gulp.Orchestrator._runTask (C:\wamp\www\sandbox\node_modules\orchestrator \index.js:273:3) at Gulp.Orchestrator._runStep (C:\wamp\www\sandbox\node_modules\orchestrator \index.js:214:10) at Gulp.Orchestrator.start (C:\wamp\www\sandbox\node_modules\orchestrator\in dex.js:134:8) at C:\Users\xxx\AppData\Roaming\npm\node_modules\gulp\bin\gulp.js:1 29:20 at _combinedTickCallback (internal/process/next_tick.js:67:7) at process._tickCallback (internal/process/next_tick.js:98:9) at Module.runMain (module.js:606:11)

C:\wamp\www\sandbox>

where my code for fulpfile.js is as follow

'use strict';

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

gulp.task("concatScripts", function(){
    gulp.src([
        'js/jquery.js', 
        'js/sticky/jquery.sticky.js',
        'js/main.js'
        ])
        .pipe(concat["app.js"])
        .pipe(gulp.dest("js"))
});
alex novickis
alex novickis
34,894 Points

concat I think should use parameter not array, ie .pipe(concat["app.js"])

change to .pipe(concat("app.js"))