[ECharts] Can't get DOM width or height. Please check dom.clientWidth and dom.clientHeight. They should not be 0.For example, you may need to call this in the callback of window.onload.

To resolve the issue of not getting the DOM width or height in ECharts, you can try the following steps:

1. Make sure you are accessing the DOM element after the document has finished loading. You can achieve this by placing your code inside the `window.onload` callback function.

   window.onload = function() {
     // Your code here
   };

2. Ensure that you are referencing the correct DOM element. Double-check if the element you are trying to access exists and is correctly targeted.

3. Verify if you are using the correct properties to retrieve the dimensions of the DOM element. Instead of `dom.clientWidth` and `dom.clientHeight`, you can use `dom.offsetWidth` and `dom.offsetHeight`.

Here's an example of how you can retrieve the width and height of a DOM element using `offsetWidth` and `offsetHeight`:

window.onload = function() {
  var dom = document.getElementById('yourElementId');
  var width = dom.offsetWidth;
  var height = dom.offsetHeight;
  console.log('Width:', width);
  console.log('Height:', height);
};

By following these steps, you should be able to resolve the issue related to fetching the DOM width or height in ECharts.