gentelella - how to hide sidebar (like it does in mobile mode)

My solution was edit custom.js and custom.css;

• In custom.js edit the part $MENU_TOGGLE , only the part $BODY.toggleClass('nav-md nav-lg'); , change nav-sm to nav-lg;
• In custom.css include code below:
  //move to left menu top and footer
  .nav-lg .top_nav {
  margin-left: 0px;
  }
  .nav-lg footer {
  margin-left: 0px;
  }

//hidden left menu
.nav-lg .left_col{
display: none;
}

/* how to hide sidebar (like it does in mobile mode) on 2018-02-01 by Eak*/

.nav-lg .top_nav {

    margin-left: 0px !important;

}

.nav-lg footer {

    margin-left: 0px !important;

}

.nav-lg .left_col {

    display: none !important;

}

.nav-lg .right_col {

    margin-left: 0px !important;

}

source : https://github.com/puikinsh/gentelella/issues/290