docs: function Resizable(arg,opt) {
          
          /**
           * Paliers horizontaux
           */
          this.stepsX = new Steps();
          /**
           * Paliers verticaux
           */
          this.stepsY = new Steps();
          
          /**
           * Element DOM
           */
          if (arg) {
              
              this.setNode(arg);
              this.field = this.node;
              
              if (opt) this.enable(opt);
          }
          else if (opt) this.set(opt);
      }