d3.js interval()用法及代码示例

d3.interval()函数用于在每个给定的时间间隔或延迟后调用该函数。如果没有给出延迟，则该延迟等于计时器。

用法:

d3.interval(callback, delay);

参数：它采用上述和以下所述的两个参数：

callback:它是在特定延迟后执行的函数。
delay:这是执行函数之后的延迟。

返回值：它返回一个对象。

注意：每次执行代码时，输出可能会不同。

范例1：没有延迟时。

HTML

<!DOCTYPE html> 
<html lang="en"> 
  
<head> 
    <meta charset="UTF-8"> 
    <meta name="viewport" content= 
        "width=device-width, initial-scale=1.0"> 
  
    <style> 
        .originalColor { 
            height:100px; 
            width:100px; 
        } 
  
        .darkerColor { 
            height:100px; 
            width:100px; 
        } 
    </style> 
</head> 
  
<body> 
    <!-- Fetching from CDN of D3.js -->
    <script type="text/javascript" 
        src="https://d3js.org/d3.v4.min.js"> 
    </script> 
      
    <script> 
        let count = 0; 
        let func = function (e) { 
            count++; 
            console.log(e); 
            console.log("Time interval will " 
                + "stop when count is greater 5"  
                + "current count:", count); 
            if (count > 5) 
                timer.stop() 
        } 
        var timer = d3.interval(func); 
    </script> 
</body> 
  
</html>

输出：

范例2：延迟时。

HTML

<!DOCTYPE html> 
<html lang="en"> 
  
<head> 
    <meta charset="UTF-8"> 
    <meta name="viewport" content= 
        "width=device-width, initial-scale=1.0"> 
  
    <style> 
        .originalColor { 
            height:100px; 
            width:100px; 
        } 
  
        .darkerColor { 
            height:100px; 
            width:100px; 
        } 
    </style> 
</head> 
  
<body> 
    <!-- Fetching from CDN of D3.js -->
    <script type="text/javascript" 
        src="https://d3js.org/d3.v4.min.js"> 
    </script> 
      
    <script> 
        let count = 0; 
        console.log("The delay is 500ms."); 
        let func = function (e) { 
            count++; 
            console.log(e); 
            console.log("Time interval will " 
                + "stop when count is greater 3"  
                + " current count:", count); 
            if (count > 3) 
                timer.stop() 
        } 
        var timer = d3.interval(func, 500); 
    </script> 
</body> 
  
</html>

输出：

相关用法

注：本文由纯净天空筛选整理自tarun007大神的英文原创作品 D3.js interval() Function。非经特殊声明，原始代码版权归原作者所有，本译文未经允许或授权，请勿转载或复制。