How to apply d3.zoom() to a html element?

@darrion.kuhn 

To apply the d3.zoom() function to an HTML element, you can follow these steps:

1. Include D3.js library in your HTML file by adding the following script tag in the head section:

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<script src="https://d3js.org/d3.v7.min.js"></script>

1. Create an SVG element in the body section of your HTML file where you want to apply the zoom behavior:

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<svg width="800" height="600"></svg>

1. Initialize the d3.zoom() function with the desired zoom behavior options. For example, you can set the minimum and maximum zoom levels, enable/disable scaling and translation, etc. Here is an example of initializing the zoom behavior with some options:

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const zoom = d3.zoom()
    .scaleExtent([0.5, 5])  // set the minimum and maximum zoom levels
    .translateExtent([[-100, -100], [900, 700]])  // set the allowed translation bounds

1. Apply the zoom behavior to the SVG element you created in step 2 by calling the zoom() method on the selection and passing in the zoom behavior initialized in step 3:

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d3.select("svg")
    .call(zoom)

1. Now you can listen to the zoom events and apply the necessary transformations to the SVG content. For example, you can listen to the 'zoom' event and update the transformation matrix of the SVG content:

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function zoomed(event) {
    const {transform} = event;
    d3.select("svg")
        .attr("transform", transform);
}

d3.select("svg")
    .call(zoom.on("zoom", zoomed));

Now, your SVG element should have zoom behavior applied to it, and you can interactively zoom in and out of the content by using the mouse wheel or touch gestures.