D3.js timer.stop() Function

The timer.stop() function in D3.js is used to stop the current ongoing timer function thus preventing further calls to the function. This function will only work if the timer has not stopped yet.

Syntax:

timer.stop()

Parameters: It takes no parameters.

Returns: It doe not return anything.

Note: The Output should be different when run different times with the same code.



Below given are a few examples of the above function.

Example 1: When the timer is stopped and timer.stop() is used after that.

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<!DOCTYPE html>
<html lang="en">
    <head>
        <meta charset="UTF-8" />
        <meta name="viewport" 
              content="width=device-width,
                       initial-scale=1.0" />
        <title>Document</title>
    </head>
    <style></style>
    <body>
        <!--Fetching from CDN of D3.js-->
        <script type="text/javascript"
                src="https:// d3js.org/d3.v4.min.js">
      </script>
        <script>
            let func = function (e) {
                console.log(
'console.log("Timer stopped") will not be executed');
                if (e > 300) {
                    console.log("Timer stopped");
// This will have no effect as timer is stopped already
                    timer.stop();
                }
                // Timer stopped
                timer.stop();
            };
            // Delay of 2000ms
            var timer = d3.timer(func);
        </script>
    </body>
</html>

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Output:

Example 2:

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<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" 
        content="width=device-width, 
                 initial-scale=1.0">
  <title>Document</title>
</head>
<style>
  .originalColor{
    height: 100px;
    width: 100px;
  }
  .darkerColor{
    height: 100px;
    width: 100px;
  }
</style>
<body>
  <!-- Fetching from CDN of D3.js -->
  <script type = "text/javascript" 
          src = "https://d3js.org/d3.v4.min.js">
  </script>
  <script>
  let func=function(e) {
    // Printing time elapsed
    console.log(e)
      if (e>=400){
        console.log("Timer stopped.")
        // Timer stopped
        timer.stop();
      }
    }
  // No delay given
   var timer = d3.timer(func);
  </script>
</body>
</html>

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Output:

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