[Vue warn]: Avoid mutating a prop directly since the value will be overwritt
2018-02-26 11:24
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父组件向子组件传入一个值，在子组件中想要改变这个值，不是直接在子组件中直接修改，而是让应该这个组件提交个事件给父组件，可以用$emit，向父组件传递你改的值，在父组件中修改传递变量，
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