D3.js arc.outerRadius() Function

Last Updated : 23 Sep, 2020

The arc.outerRadius() function in d3.js library is used to set the outer radius of the produced arc. It takes a number that defines the outer radius of the arc.

Syntax:

arc.outerRadius([radius]);

Parameters: This function accepts a single parameter as mentioned above and described below.

radius: This defines the size of the outer radius of the arc.

Return Value: This function does not return anything.

Below given are a few examples of the function given above.

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 src= 
        "https://d3js.org/d3.v6.min.js"> 
    </script> 
</head> 
  
<body> 
    <div style="width:300px; height:300px;"> 
        <center> 
            <h1 style="color:green"> 
                GeeksforGeeks 
            </h1> 
            <h2> 
                arc.outerRadius() 
            </h2> 
        </center> 
        <svg width="300" height="300"> 
        </svg> 
    </div> 
      
    <script> 
        var svg = d3.select("svg") 
            .append("g") 
            .attr("transform", "translate(150, 100)"); 
  
        // An arc will be produced 
        var arc = d3.arc() 
            .innerRadius(85) 
            // Use of outerRadius Function  
            .outerRadius(88) 
            .startAngle(0) 
            .endAngle(10); 
  
        svg.append("path") 
            .attr("class", "arc") 
            .attr("d", arc); 
  
        let p = document.querySelector(".arc"); 
        p.style.fill = "green"; 
    </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 src="https://d3js.org/d3.v6.min.js"> 
    </script> 
</head> 
  
<body> 
    <div style="width:300px; height:300px;"> 
        <center> 
            <h1 style="color:green"> 
                GeeksforGeeks 
            </h1> 
            <h2> 
                arc.outerRadius() 
            </h2> 
        </center> 
        <svg width="300" height="300"> 
        </svg> 
    </div> 
      
    <script> 
        var svg = d3.select("svg") 
            .append("g") 
            .attr("transform", "translate(150, 100)"); 
  
        // An arc will be produced 
        var arc = d3.arc() 
            .innerRadius(0) 
            // Use of outerRadius Function  
            .outerRadius(65) 
            .startAngle(0) 
            .endAngle(10); 
  
        svg.append("path") 
            .attr("class", "arc") 
            .attr("d", arc); 
  
        let p = document.querySelector(".arc"); 
        p.style.fill = "green"; 
    </script> 
</body> 
  
</html> 