调用子组件方法Error in v-on handler: "TypeError: Cannot read properties of undefined

调用子组件方法时出现"TypeError: Cannot read properties of undefined"错误可能有几种原因。

引用中的错误信息是"Error in v-on handler: 'TypeError: Cannot read properties of undefined (reading '0')'"，可能是因为在处理函数中访问了一个未定义的属性。解决方法一是确保访问的属性是已定义的，并且确保在处理函数中正确地使用了该属性。

引用中的错误信息是"Uncaught TypeError: Cannot read property 'then' of undefined"，可能是在一个Promise对象上调用了then方法，但该对象未定义。解决方法二是使用async关键字来定义函数，并在函数内部使用await关键字来等待一个Promise对象的结果。这种方法通常用于异步操作。

综上所述，调用子组件方法出现"TypeError: Cannot read properties of undefined"错误可能是因为访问了未定义的属性或在未定义的对象上调用了方法。解决方法可以是确保属性和对象的定义，或者使用async/await来处理异步操作。<span class="em">1</span><span class="em">2</span><span class="em">3</span>
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