How to put a scroll event on svg in d3.js?

@mac 

To put a scroll event on an SVG element in D3.js, you can use the window object to listen for the scroll event and then check if the element that triggered the event is the SVG element. Here is an example code snippet that demonstrates how to add a scroll event to an SVG element using D3.js:

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// Select the SVG element
var svg = d3.select("svg");

// Add a scroll event listener to the window object
window.addEventListener("scroll", function(event) {
    // Check if the target element that triggered the scroll event is the SVG element
    if (event.target === svg.node()) {
        // Code to execute when the SVG element is scrolled
        console.log("SVG element scrolled!");
    }
});

In this example, we select the SVG element using D3.js and then add a scroll event listener to the window object. Inside the event listener function, we check if the target element that triggered the scroll event is the SVG element, and if it is, we execute the desired code. You can replace the console.log statement with your own custom code to handle the scroll event on the SVG element.