dist/cytoscape.esm.js
function matches$$1(ele) {
  var self = this;

  for (var j = 0; j < self.length; j++) {
    var query = self[j];

    if (matches(query, ele)) {
      return true;
    }
  }

  return false;
}
function matches$$1(ele) {
  var self = this;

  for (var j = 0; j < self.length; j++) {
    var query = self[j];

    if (matches(query, ele)) {
      return true;
    }
  }

  return false;
}
function matches$$1 ( ele ) { var self = this ; for ( var j = 0 ; j < self . length ; j ++ ) { var query = self [ j ] ; if ( matches ( query , ele ) ) { return true ; } } return false ; }
filter does selector match a single element?
filter does selector match a single element?