DevEco升级到2.1Beta3后JS中的canvas标签报错

<div class="container">
    <text class="scores">
        最高分：{{bestScores}}
    </text>
    <text class="scores">
        当前分：{{currentScores}}
    </text>
    <stack class="stack">
        <canvas class="canvas" ref="canvas" onswipe="swipeGrids">
        </canvas>
        <div class="subcontainer" show="{{isShow}}">
            <text class="gameover">
                游戏结束
            </text>
        </div>
    </stack>
    <input type="button" value="重新开始" class="btn" onclick="restartGame"/>
</div>
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