echarts.js:2178 There is a chart instance already initialized on the dom.

回答: 这个问题出现的原因是在同一个DOM元素上已经初始化了一个图表实例，而你又尝试去初始化一个新的图表实例。这可能是因为在代码中多次调用了初始化图表的函数。为了解决这个问题，你可以在初始化新图表实例之前，先销毁之前的图表实例。你可以使用`dispose()`方法来销毁旧的图表实例，然后再进行新的初始化操作。比如在你的代码中，在调用`this.$echarts.init()`之前，先调用`dispose()`方法来销毁之前的图表实例，再进行新的初始化操作。这样就可以解决这个问题了。<em>1</em><em>2</em>
#### 引用[.reference_title]
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