// Define the ids of your boards in BOARDID0, BOARDID1,...
(function() {
const board1 = JXG.JSXGraph.initBoard(BOARDID0, {
boundingbox: [-3, 3, 3, -3],
keepaspectratio: true
});
var A = board1.create('point', [-1, 1]);
var B = board1.create('point', [1, 0]);
var C = board1.create('point', [0, -1]);
var ell = board1.create('ellipse', [A, B, C]);
})();
(function() {
const board2 = JXG.JSXGraph.initBoard(BOARDID1, {
boundingbox: [-3, 3, 3, -3],
keepaspectratio: true
});
var A = board2.create('point', [-1, 0]);
var B = board2.create('point', [1, 0]);
var s = board2.create('slider', [
[-1, -2],
[1, -2],
[0, 4, 10]
]);
var ell = board2.create('ellipse', [A, B, function() {
return s.Value();
}]);
})();