whole_func_string: function increaseVolume(step) {
  	      var volume = this.media.muted ? 0 : this.volume;
  	      this.volume = volume + (is$1.number(step) ? step : 0);
  	    }
func_code_string: function increaseVolume(step) {
  	      var volume = this.media.muted ? 0 : this.volume;
  	      this.volume = volume + (is$1.number(step) ? step : 0);
  	    }
func_documentation_string: Increase volume
  @param {Boolean} step - How much to decrease by (between 0 and 1)