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JavaScript

Posted by Fynn Lehnert
Fynn Lehnert
15,244 Points

TypeError: useref.assets is not a function

Attention everyone! useref recently updated to v3.

check github for migrating from v2 to v3.

just sat half an hour searching my script for errors.

https://github.com/jonkemp/gulp-useref

still throws errors like Error in plugin 'gulp-uglify'

anyone have an answer for me?

greets, fynn

3 Answers

Fynn Lehnert
Fynn Lehnert
15,244 Points

managed to figure out the answer by myself

this does the job!

gulp.task('html', function() {
    return gulp.src(options.src + '/index.html')
        .pipe(useref())
        .pipe(iff('*.js', uglify()))
        .pipe(gulp.dest(options.dist))
});
Viktor Yakov
seal-mask
.a{fill-rule:evenodd;}techdegree seal-36
Viktor Yakov
Front End Web Development Techdegree Graduate 15,770 Points
Viktor Yakov
.a{fill-rule:evenodd;}techdegree seal-36
Viktor Yakov
Front End Web Development Techdegree Graduate 15,770 Points

I also encountered this problem. I was watching the WorkShop "Using Gulp's 'gulp-useref' For a Full Build Pipeline" with the teacher Huston Hedinger. Somewhere in the course I had an error "TypeError: useref.assets is not a function". Took me a while to solve this problem I found solution on "npmjs", "https://www.npmjs.com/package/gulp-useref. The problem is because they changed the versions from v2 to v3. In the video Huston Hedinger apparently works with v2. Here is the solution.

var useref = require('gulp-useref'),
  gulpif = require('gulp-if');

gulp.task('html', function() {
  return gulp.src(options.src + '/index.html')
    .pipe(useref())
    .pipe(gulpif('*.js', uglify()))
    .pipe(gulp.dest(options.dist));
});'''