code: function shoelace(edges) {
  
  			var area = 0;
  
  			var _iteratorNormalCompletion = true;
  			var _didIteratorError = false;
  			var _iteratorError = undefined;
  
  			try {
  				for (var _iterator = edges[Symbol.iterator](), _step; !(_iteratorNormalCompletion = (_step = _iterator.next()).done); _iteratorNormalCompletion = true) {
  					var _step$value = _slicedToArray(_step.value, 2);
  
  					var u = _step$value[0];
  					var v = _step$value[1];
  					area += vcross2(u, v);
  				}
  			} catch (err) {
  				_didIteratorError = true;
  				_iteratorError = err;
  			} finally {
  				try {
  					if (!_iteratorNormalCompletion && _iterator["return"]) {
  						_iterator["return"]();
  					}
  				} finally {
  					if (_didIteratorError) {
  						throw _iteratorError;
  					}
  				}
  			}
  
  			return Math.abs(area) / 2;
  		}
docs: /* js/src/d2 /* js/src/d2/area /* js/src/d2/area/shoelace.js