The reason is that nextVipName in the last line of this.setData assignment code, index value is 4, but the length of data is 5, so the data[index+1] marked as index+1 does not exist, so setData assignment fails. problem.
Modify it and it's ok:
WeChat applet setData assignment failed
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Origin blog.csdn.net/qq_41588568/article/details/108979975
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