D3.js time.copy()函数

D3.js中的time.copy()函数用于构造并返回原始比例的副本。对原始比例所做的更改不会影响复制比例，反之亦然。

句法：

time.copy()

参数：此函数不接受任何参数。

返回值：此函数返回原始比例的副本。

下面的程序说明了 D3.js 中的time.copy()函数：

示例 1：

HTML

  

    
    
    
    
    
    
    
    

  

    GeeksforGeeks
  
    time.copy() Function 
  
    
  
        var time = d3.scaleTime()
  
            // Setting domain and range
            // for the scale
            .domain([1, 100])
            .range([1, 10]);
  
        // Creating a copy of the scale
        var copy = time.copy();
  
        document.write("<h3>time(1): " +
            time(1) + "</h3>");
        document.write("<h3>time(100): " +
            time(100) + "</h3>");
        document.write("<p> copy scale: </p>");
          
    document.write("<h3>copy(100): " +
            copy(100) + "</h3>");
        document.write("<h3>copy(1): " +
            copy(1) + "</h3>");
    

  

输出：

示例 2：

HTML

  

    
    
    
    
    
    
    
    

  

    GeeksforGeeks
  
    time.copy() Function 
  
    
  
        var time = d3.scaleTime()
  
            // Setting domain and range
            // for the scale.
            .domain([1, 100])
            .range([1, 10]);
  
        // Creating a copy of the scale
        var copy = time.copy();
  
        document.write("<h3>time(1000): " +
            time(1000) + "</h3>");
        document.write("<h3>time(100000): " +
            time(10000) + "</h3>");
  
        // Using clamp on the copy of the scale
        document.write(
    "<p> copy scale with clamp function.</p>");
      
        copy.clamp(true);
        document.write("<h3>copy(1000): " +
            copy(1000) + "</h3>");
        document.write("<h3>copy(10000): " +
            copy(10000) + "</h3>");
    

  

输出：