D3.js 连续.domain()函数

Continuous.domain()函数用于将刻度的域设置为指定的数字数组。此处指定的数组包含两个或两个以上的元素。

句法：

continuous.domain([domain]);

参数：此函数接受上面提到和下面描述的单个参数。

• [domain]：这是一个包含两个或多个指定域的值的数组。

返回值：此函数不返回任何内容。

下面的示例说明了 JavaScript 中的 D3.js Continuous.domain()函数：

示例 1：

HTML

 
 
 
     
     
    
     
    
     
    
     
    
     
 
 
    
        Geeksforgeeks
    
      
    D3.js continuous.domain() Function 
  
     
    var object = d3.scaleLinear()
                // Domain ranges 0 to 1
                    .domain([0, 1])
                    .range(["red", "green"]);
    document.write("<br/>")
    document.write("<h4>"+object(0)+"</h4>");
    document.write("<h4>"+object(1)+"</h4>");
     
 

输出：

示例 2：

HTML

    
        
        
    
    
        div {
            padding: 6px;
            text-align: center;
            vertical-align: middle;
            display: flex;
            justify-content: center;
            color: White;
            width: fit-content;
            margin-top: 2px;
            height: 20px;
        }
    
    
        
            GeeksforGeeks
        
        D3.js continuous.domain()
        
            continuous(0.5)
        
        
            continuous(0.4)
        
        
            continuous(0.3)
        
        
            continuous(0.2)
        
        
            continuous(0.1)
        
        
        
         
        
         
        
         
        
         
        
            var continuous = d3
                .scaleLinear()
                // Domain ranges 0 to 1
                .domain([-2, -1, 0, 1, 2])
                .range(["Blue", "green", "orange",
                        "Red", "black"]);
            let color1 = continuous(-2);
            let color2 = continuous(-1.5);
            let color3 = continuous(0);
            let color4 = continuous(1.5);
            let color5 = continuous(2);
  
            // Selecting Div using query selector
            let box1 = document.querySelector(".box1");
            let box2 = document.querySelector(".box2");
            let box3 = document.querySelector(".box3");
            let box4 = document.querySelector(".box4");
            let box5 = document.querySelector(".box5");
  
            // Setting style and BG color of 
            // the particular DIVs
            box1.style.backgroundColor = color1;
            box2.style.backgroundColor = color2;
            box3.style.backgroundColor = color3;
            box4.style.backgroundColor = color4;
            box5.style.backgroundColor = color5;
        
    

输出：