Error in onReady hook: "TypeError: Cannot read properties of undefined (reading 'setRules')"

这个错误提示表明在onReady钩子函数中尝试读取一个未定义对象的setRules属性，其中报错信息为"TypeError: Cannot read properties of undefined (reading 'setRules')"。

造成这个错误的原因可能是在onReady钩子函数中引用了一个未定义的数据属性或计算属性，或者尝试访问组件的DOM元素，但DOM元素尚未完全加载或渲染完成。

为了解决这个问题，你可以先确保在onReady钩子函数中引用的对象或属性已经正确定义和赋值。此外，你还可以将代码逻辑调整到mounted钩子函数中，因为mounted钩子函数表示组件已经挂载到DOM上并完全渲染完成。这样可以确保在访问DOM元素时不会出现未定义的情况。<span class="em">1</span><span class="em">2</span><span class="em">3</span>
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