D3 Transitions The process of changing from one state to another is managed through transitions Due to the importance of smooth clean transitions when presenting your visualizations D3 has a specific method for managing this called transition transition method The transition method is available for all selectors In addition to the selectors the transition method also supports most of the selection methods such as style and attr Note the transition method does not support the append or data method i e it cannot impact these methods by transitioning their change For example when you change the data this should happen immediately and not gradually over time When you call the transition method you need to be sure that you ve setup called the append and data methods first In addition to the transition method there are a number of control methods such as duration and ease Look at the following example to see how simple it s to integrate transitions into your D3 code d3 select body transition style background color lightgreen A transition can be directly created using the d3 transition method followed by the selectors as follows let t d3 transition duration 3000 d3 select body transition t style background color lightgreen Minimal Example Let s create a simple example to see how transitions work in a complete implementation DOCTYPE html html head script type text javascript src https d3js org d3 v7 min js script head body style height 50pt h1 Transitions are Amazing h1 script d3 select body transition style background color lightgreen script body html In the above example you select the body element and then start transitioning by calling the transition method You then instruct the transition to change the background color from the current color to lightgreen When you run or refresh the example you should see the background screen color change gradually to lightgreen You could take the concept further as shown below by truncating transitions so the background color will transition between different colors before stopping In the example below the background will change from the current color to lightgreen to yellow and finally white DOCTYPE html html head script type text javascript src https d3js org d3 v7 min js script head body style height 50pt h1 Transitions are Amazing h1 script d3 select body transition style background color lightgreen transition style background color yellow transition style background color white script body html duration ease and delay methods The duration and ease methods give you an extra aspect of control if you want the transitions to be slow or fast linear or non linear DOCTYPE html html head script type text javascript src https d3js org d3 v7 min js script head body style height 50pt h1 Transitions are Amazing h1 script d3 select body transition delay 1000 wait 1 second before starting transition duration 4000 take 4 seconds the transition ease d3 easeCubicIn transition type style background color lightblue script body html
reen script body html In the above example you select the body element and then start transitioning by calling the transition method You then instruct the transition to change the background color from the current color to lightgreen When you run or refresh the example you should see the background screen color change gradually to lightgreen You could take the concept further as shown below by truncating transitions so the background color will transition between different colors before stopping In the example below the background will change from the current color to lightgreen to yellow and finally white DOCTYPE html html head script type text javascript src https d3js org d3 v7 min js script head body style height 50pt h1 Transitions are Amazing h1 script d3 select body transition style background color lightgreen transition style background color yellow transition style background color white script body html duration ease and delay methods The duration and ease methods give you an extra aspect of control if you want the transitions to be slow or fast linear or non linear DOCTYPE html html head script type text javascript src https d3js org d3 v7 min js script head body style height 50pt h1 Transitions are Amazing h1 script d3 select body transition delay 1000 wait 1 second before starting transition duration 4000 take 4 seconds the transition ease d3 easeCubicIn transition type style background color lightblue script body html