how to use gulp js code example

Example: what is gulpjs

/* 
  What is gulpjs ?
  It's just a tookit library for optimizing some repetative tasks like comilying Sass every time manually 
  by using gulpjs we can do repeatative task with one command and we can also watch if any change on those task occur
  e.g:
  Moving/Copying Files		
  Concatenate JavaScript Files		
  Minify / Uglify JavaScript Files		
  Compile Sass/scss Files		
  Optimize Images with Imagemin		

  some resources to practice :
  sample repo  : https://github.com/abdulmoizshaikh/gulpexapp
  crash course : https://www.youtube.com/watch?v=1rw9MfIleEg&ab_channel=TraversyMedia 
*/