I would like to find out how to I push a new Row with a unique ID. If canvas is not empty, I would like to push a new Row with the following ID. If canvas has a Row already so next one would be 2 and so on.I would like to find out how to I push a new Ro
阅读背景：
如何推送新数组并向对象添加增量编号（ID）
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