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哪位大哥教一下怎么写提交一次的JS代码

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我代码是放在error里面的,但是写的逻辑半点用都没有,还是提交成功了,还有怎么只能提交一次!!!
球大神教一教!


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。。。你把逻辑判断写$.ajax()前面。

mui.alert()后面写return


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