text: var gulp = require('gulp'),
  del = require('del'),
  usemin = require('gulp-usemin');
  
  gulp.task('deleteDistFolder',function() {
    return del(".dist");
  });
  
  gulp.task('usemin', ['deleteDistFolder'], function() {
    return gulp.src("./index.html")
      .pipe(usemin())
      .pipe(gulp.dest("./dist"));
  });
  
  gulp.task('build', ['deleteDistFolder', 'usemin']);
  