// Animate an elementary move
animateMove: function(move, callback) {
let startSquare = document.getElementById(getSquareId(move.start));
+ if (!startSquare) return; //shouldn't happen but...
let endSquare = document.getElementById(getSquareId(move.end));
let rectStart = startSquare.getBoundingClientRect();
let rectEnd = endSquare.getBoundingClientRect();
let movingPiece = document.querySelector(
"#" + getSquareId(move.start) + " > img.piece"
);
+ // For some unknown reasons Opera get "movingPiece == null" error
+ // TOOO: is it calling 'animate()' twice ? One extra time ?
+ if (!movingPiece) return;
// HACK for animation (with positive translate, image slides "under background")
// Possible improvement: just alter squares on the piece's way...
const squares = document.getElementsByClassName("board");