D3.js interpolatePurples()函数

d3.interpolatePurples()函数是 D3.js 中顺序（单色调）颜色的一部分。此函数用于根据给定参数的不同值返回不同的颜色深浅。

句法：

d3.interpolatePurples(t);

参数：此函数接受如上所述和如下所述的单个参数：

• t：它是 0 到 1 范围内的任意数字。

返回值：它返回一个 RGB字符串。

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

示例 1：

HTML

    
        
        
        D3.js interpolatePurples() Function
    
    
    
        
        
        
        
        
        
        
        
        
            console.log(d3.interpolatePurples(0));
            console.log(d3.interpolatePurples(0.124));
            console.log(d3.interpolatePurples(0.52));
            console.log(d3.interpolatePurples(0.42));
            console.log(d3.interpolatePurples(0.24));
            console.log(d3.interpolatePurples(0.8));
            console.log(d3.interpolatePurples(0.12));
            console.log(d3.interpolatePurples(1));
        
    

输出：

示例 2：

HTML

    
        
        
        D3.js interpolatePurples() Function
    
    
        div {
            padding: 5px;
            text-align: center;
            vertical-align: middle;
            display: flex;
            justify-content: center;
            width: fit-content;
            height: 50px;
            float: left;
        }
    
    
        D3.interpolatePurples()
        
            
                (0.1)
            
        
        
            
                (0.2)
            
        
        
            
                (0.3)
            
        
        
            
                (0.4)
            
        
        
            
                (0.5)
            
        
        
        
        
        
        
        
        
        
        
        
            // Creating different colors for different
            // Values of t as 0.1,0.2... 1.0
            let color1 = d3.interpolatePurples(0.1);
            let color2 = d3.interpolatePurples(0.2);
            let color3 = d3.interpolatePurples(0.3);
            let color4 = d3.interpolatePurples(0.4);
            let color5 = d3.interpolatePurples(0.5);
  
            // 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：