How to externally trigger d3.js events?

@muriel.schmidt 

You can trigger D3.js events externally by dispatching custom events using the dispatch method on a D3 selection. Here is an example of how you can trigger a custom event externally:

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// Select the element you want to trigger the event on
var element = d3.select("#myElement");

// Define the custom event
var customEvent = new CustomEvent('myCustomEvent', { detail: { key: 'value' } });

// Dispatch the custom event on the selected element
element.node().dispatchEvent(customEvent);

In this example, we are creating a custom event called myCustomEvent with the detail property set to a key-value pair. We then dispatch this custom event on a D3 selection using the dispatchEvent method on the selected element's node.

You can listen for this custom event using D3's event handling functions like on or dispatch on the same element or any other element in your D3 visualization to respond to the externally triggered event.