demos/Collage/fabric.js
function (canvasEl) {
      this.lowerCanvasEl = fabric.util.getById(canvasEl) || this._createCanvasElement();
      this._initCanvasElement(this.lowerCanvasEl);

      fabric.util.addClass(this.lowerCanvasEl, 'lower-canvas');

      if (this.interactive) {
        this._applyCanvasStyle(this.lowerCanvasEl);
      }

      this.contextContainer = this.lowerCanvasEl.getContext('2d');
    }
function (canvasEl) {
      this.lowerCanvasEl = fabric.util.getById(canvasEl) || this._createCanvasElement();
      this._initCanvasElement(this.lowerCanvasEl);

      fabric.util.addClass(this.lowerCanvasEl, 'lower-canvas');

      if (this.interactive) {
        this._applyCanvasStyle(this.lowerCanvasEl);
      }

      this.contextContainer = this.lowerCanvasEl.getContext('2d');
    }
function ( canvasEl ) { this . lowerCanvasEl = fabric . util . getById ( canvasEl ) || this . _createCanvasElement ( ) ; this . _initCanvasElement ( this . lowerCanvasEl ) ; fabric . util . addClass ( this . lowerCanvasEl , 'lower-canvas' ) ; if ( this . interactive ) { this . _applyCanvasStyle ( this . lowerCanvasEl ) ; } this . contextContainer = this . lowerCanvasEl . getContext ( '2d' ) ; }
Creates a secondary canvas
@method _createLowerCanvas
Creates a secondary canvas