D3.js interpolateCubehelixLong() Function

Last Updated : 07 Aug, 2020

The d3.interpolateCubehelixLong() function is used to return the cubehelix color space interpolator between the two given colors A and B. It uses the shortest path between the hues.

Syntax:

d3.interpolateCubehelixLong(a, b);

Parameters: It takes the two parameters as given above and described below.

a: It is the name of color in string format.
b: It is also the name of color in string format.

Return Value: It returns the function.

Example 1:

HTML

<!DOCTYPE html> 
<html lang="en"> 
  
<head> 
    <meta charset="UTF-8"> 
    <meta name="viewport" content= 
        "width=device-width,initial-scale=1.0"> 
    
    <!--Fetching from CDN of D3.js -->
    <script type="text/javascript" 
        src="https://d3js.org/d3.v4.min.js"> 
    </script> 
</head> 
  
<body> 
  
    <script> 
        console.log("Type of the function is: ", 
            typeof(d3.interpolateCubehelixLong("white", "red"))) 
  
        console.log( 
            d3.interpolateCubehelixLong("blue", "white")(0.9)) 
  
        console.log( 
            d3.interpolateCubehelixLong("white", "green")(0.1))  
    </script> 
</body> 
  
</html>

Output:

Example 2:

HTML

<!DOCTYPE html> 
<html lang="en"> 
  
<head> 
    <meta charset="UTF-8"> 
    <meta name="viewport" content= 
        "width=device-width,initial-scale=1.0"> 
  
      <!--Fetching from CDN of D3.js -->
    <script type="text/javascript" 
        src="https://d3js.org/d3.v4.min.js"> 
    </script> 
    
    <style> 
        .bx1, 
        .bx2 { 
            width: 100px; 
            height: 100px; 
        } 
    </style> 
</head> 
  
<body> 
      
<p>D3.interpolateCubehelixLong()</p> 
  
    <div class="bx1"></div> 
    <div class="bx2"></div> 
      
    <script> 
        let color1 = 
            d3.interpolateCubehelixLong("green", "white")(0.1) 
        let color2 = 
            d3.interpolateCubehelixLong("white", "green")(0.1) 
        let bx1 = document.querySelector(".bx1"); 
        bx1.style.backgroundColor = color1; 
        let bx2 = document.querySelector(".bx2"); 
        bx2.style.backgroundColor = color2;  
    </script> 
</body> 
  
</html>