The timer.restart() function in D3.js is used to restart a timer with the given function and delay. The timer.restart() function is used when one wants to reset the timer and start again.
Syntax:
timer.restart(callback, delay);
Parameters: It takes two parameters as mentioned above and described below:
- callback: It is the function to be stopped or start after a particular delay.
- delay: It is the time after which the function will be executed or stop
Example 1: When no delay is given.
HTML
<!DOCTYPE html> < html lang = "en" >   < head >     < meta charset = "UTF-8" >     < meta name = "viewport" content =         "width=device-width, initial-scale=1.0" > </ head >   < body >     <!-- Fetching from CDN of D3.js -->     < script type = "text/javascript"      </ script >           < script >         count = 0;         let func = function (e) {             console.log(e)             if (e > 40) {                 console.log("Timer stopped after 40ms")                 if (e > 40) {                     count++;                       // Restarting the timer again                     console.log("Timer restarts")                     timer.restart(func)                 }                 if (count > 2) {                     timer.stop();                     console.log(                         "count > 2 so timer is stopped")                 }             }         }         var timer = d3.timer(func);     </ script > </ body >   </ html > |
Output:
Example 2: When a delay is given.
HTML
<!DOCTYPE html> < html lang = "en" >   < head >     < meta charset = "UTF-8" >     < meta name = "viewport" content =         "width=device-width, initial-scale=1.0" > </ head >   < body >     <!-- Fetching from CDN of D3.js -->     < script type = "text/javascript"      </ script >           < script >         count = 0;         let func = function (e) {             console.log(e)             if (e > 10) {                 console.log("Timer stopped after 10ms")                 if (e > 10) {                     count++;                       // Restarting the timer again                     console.log("Timer restarts")                     timer.restart(func)                 }                 if (count > 4) {                     timer.stop();                     console.log(                     "count > 4 so timer is stopped")                 }             }         }         // A delay of 2000ms         var timer = d3.timer(func, 2000);     </ script > </ body >   </ html > |
Output: