[Vue warn]: Error in render: "TypeError: Cannot read properties of undefined (reading '********')"
这是一种假报错，不会影响程序的运行，这是因为这个属性‘****’的前面是一个undefined，
比如说：
user(){ return this.users.find(item=>item.iuser=='男') }
这里应该有一个的兜底的东西，比如说，在这里计算出来的是一个空对象，那么就用一个空对象来兜底就不会报错，如果计算出来的是一个数组，就用数组兜底
user(){ return this.users.find(item=>item.iuser=='男')||{} }
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