Check out example codes for "d3". It will help you in understanding the concepts better.

Code Example 1

<script src="https://d3js.org/d3.v6.js"></script>

Code Example 2

var paragraphs = document.getElementsByTagName("p");
for (var i = 0; i < paragraphs.length; i++) {
  var paragraph = paragraphs.item(i);
  paragraph.style.setProperty("color", "blue", null);
}

Code Example 3

<script src="https://d3js.org/d3.v5.min.js"></script>

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