log.js:61 [ECharts] There is a chart instance already initialized on the dom. 要如何解决

这个警告信息是因为在同一个DOM节点上多次初始化echarts实例导致的。解决方法是在初始化之前先判断该DOM节点上是否已经存在echarts实例，如果存在则不再初始化，否则再进行初始化。可以使用echarts提供的getInstanceByDom()方法来判断是否已经存在echarts实例。以下是一个示例代码：

getChart(el) {
  let myChart = this.$echarts.getInstanceByDom(document.getElementById(el));  if (myChart == undefined) {
    myChart = this.$echarts.init(document.getElementById(el));
  }
  let _config = this.optionChart(data);
  myChart.clear();
  myChart.setOption(_config);
},

在这个示例代码中，我们首先使用getInstanceByDom()方法来获取该DOM节点上的echarts实例，如果不存在则使用init()方法进行初始化。最后再使用clear()方法清空之前的数据，setOption()方法设置新的数据。

相关问题

[ECharts] There is a chart instance already initialized on the dom. 4 log.js:61

It seems like you are encountering an error with ECharts. The error message "There is a chart instance already initialized on the DOM" suggests that you are trying to initialize a chart on a DOM element that already has a chart instance associated with it.

To resolve this issue, you can either destroy the existing chart instance before initializing a new one or reuse the existing chart instance for your new data or configuration. Here's an example of how you can destroy a chart instance:

// Assuming chartInstance is the reference to your existing chart instance
chartInstance.dispose();```

After destroying the existing instance, you can initialize a new chart instance on the same DOM element without any conflicts.

Alternatively, if you want to reuse the existing chart instance, you can update its data or configuration using appropriate methods provided by the ECharts library.

Remember to make sure that you are not accidentally initializing multiple chart instances on the same DOM element.

echarts.js:2218 There is a chart instance already initialized on the dom

这个错误提示是因为在同一个 DOM 元素上重复初始化了 echarts 实例。解决方法是先销毁已有的实例，再重新初始化。

可以使用以下代码销毁已有的实例：

var chartDom = document.getElementById('chart');
var chartInstance = echarts.getInstanceByDom(chartDom);
if (chartInstance) {
    chartInstance.dispose();
}

然后再重新初始化：

var myChart = echarts.init(chartDom);