d3.js timer.restart()用法及代碼示例

D3.js中的timer.restart()函數用於以給定的函數和延遲重新啟動定時器。如果要重置計時器並重新啟動，則使用timer.restart()函數。

用法:

timer.restart(callback, delay);

參數：它采用如上所述和以下所述的兩個參數：

callback:它是在特定延遲後停止或啟動的函數。
delay:這是該函數將被執行或停止的時間

範例1：沒有延遲時。

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" 
        src="https://d3js.org/d3.v4.min.js"> 
    </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>

輸出：

範例2：延遲時。

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" 
        src="https://d3js.org/d3.v4.min.js"> 
    </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>

輸出：

相關用法

注：本文由純淨天空篩選整理自tarun007大神的英文原創作品 D3.js timer.restart() Function。非經特殊聲明，原始代碼版權歸原作者所有，本譯文未經允許或授權，請勿轉載或複製。