Introduction - If you have any usage issues, please Google them yourself
The full name of D3 is (Documents Data-Driven), just as its name implies can know is a data driven document JavaScript class library. If you do not know what is JavaScript, please first learn the relevant knowledge of javascript.
To put it simply, D3.js is mainly used for the operation of data, it is through the use of HTML, SVG, CSS to give you the data into life, that is converted to a variety of simple and easy to understand the gorgeous graphics.