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D3.js continuous.domain() Function

  • Last Updated : 01 Sep, 2020

The continuous.domain() function is used to set the scale’s domain to the specified array of numbers. The array specified here contains two or more than two elements in it.

Syntax:

continuous.domain([domain]);

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

  • [domain]: This is an array that takes two or more values that specify the domain.

Return Values: This function does not return anything. 

Below examples illustrate the D3.js continuous.domain() function in JavaScript:

Example 1:

HTML




<!DOCTYPE html> 
<html lang="en"
<head
    <meta charset="UTF-8" /> 
    <meta name="viewport"
        path1tent="width=device-width, 
        initial-scale=1.0"/> 
    <script src=
    </script
    <script src=
    </script
    <script src=
    </script
    <script src=
    </script
</head
<body style="text-align: center;"
    <h2 style="color: green;">
        Geeksforgeeks
    </h2>
      
    <p>D3.js continuous.domain() Function </p>
  
    <script
    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>");
    </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"/>
    </head>
    <style>
        div {
            padding: 6px;
            text-align: center;
            vertical-align: middle;
            display: flex;
            justify-content: center;
            color: White;
            width: fit-content;
            margin-top: 2px;
            height: 20px;
        }
    </style>
    <body>
        <h2 style="color: green;">
            GeeksforGeeks
        </h2>
        <p>D3.js continuous.domain()</p>
        <div class="box1">
            <span>continuous(0.5)</span>
        </div>
        <div class="box2">
            <span>continuous(0.4)</span>
        </div>
        <div class="box3">
            <span>continuous(0.3)</span>
        </div>
        <div class="box4">
            <span>continuous(0.2)</span>
        </div>
        <div class="box5">
            <span>continuous(0.1)</span>
        </div>
        <!--Fetching from CDN of D3.js -->
        <script src=
         </script>
        <script src=
         </script>
        <script src=
         </script>
        <script src=
         </script>
        <script>
            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;
        </script>
    </body>
</html>

Output:


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