切换布局
显示结果
<html> <head> <script type="text/javascript" src="https://cdn.jsdelivr.net/npm/d3@7"></script> </head> <body> <h3>D3 collection API</h3> <script> var month = {"jan": 1, "Feb": 2, "mar": 3, "apr": 4}; console.log(d3.keys(month)); console.log(d3.values(month)); console.log(d3.entries(month)); </script> </body> </html>