@publishvue/chessground/drop.js

lichess.org chess ui

import * as board from './board';
import * as util from './util';
import { cancel as dragCancel } from './drag';
export function setDropMode(s, piece) {
    s.dropmode = {
        active: true,
        piece,
    };
    dragCancel(s);
}
export function cancelDropMode(s) {
    s.dropmode = {
        active: false,
    };
}
export function drop(s, e) {
    if (!s.dropmode.active)
        return;
    board.unsetPremove(s);
    board.unsetPredrop(s);
    const piece = s.dropmode.piece;
    if (piece) {
        s.pieces.set('a0', piece);
        const position = util.eventPosition(e);
        const dest = position && board.getKeyAtDomPos(position, board.whitePov(s), s.dom.bounds());
        if (dest)
            board.dropNewPiece(s, 'a0', dest);
    }
    s.dom.redraw();
}
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