Función D3.js interpolateReds()

La función d3.interpolateReds() en D3.js se usa para devolver un rango de color en rojo. En palabras simples, devuelve diferentes tonos de color rojo según el valor entero dado como parámetro. 

Sintaxis:

d3.interpolateReds(t);

Parámetros: esta función acepta un solo parámetro como se mencionó anteriormente y se describe a continuación:

  • t:  Es cualquier número en el rango de 0 a 1.

Valores devueltos: esta función devuelve una string de color RGB.

Los siguientes ejemplos ilustran la función D3.js interpolateReds() en JavaScript:

Ejemplo 1:

HTML

<!DOCTYPE html>
<html lang="en">
    <head>
        <meta charset="UTF-8" />
        <meta
            name="viewport"
            content="width=device-width, 
                     initial-scale=1.0"/>
        <title>D3.js interpolateReds() function</title>
    </head>
    <style></style>
    <body>
        <!--Fetching from CDN of D3.js -->
        <script src=
"https://d3js.org/d3.v4.min.js">
        </script>
        <script src=
"https://d3js.org/d3-color.v1.min.js">
        </script>
        <script src=
"https://d3js.org/d3-interpolate.v1.min.js">
        </script>
        <script src=
"https://d3js.org/d3-scale-chromatic.v1.min.js">
        </script>
        <script>
            console.log(d3.interpolateReds(0));
            console.log(d3.interpolateReds(0.124));
            console.log(d3.interpolateReds(0.52));
            console.log(d3.interpolateReds(0.42));
            console.log(d3.interpolateReds(0.24));
            console.log(d3.interpolateReds(0.8));
            console.log(d3.interpolateReds(0.12));
            console.log(d3.interpolateReds(1));
        </script>
    </body>
</html>

Producción:

Ejemplo 2:

HTML

<!DOCTYPE html>
<html lang="en">
    <head>
        <meta charset="UTF-8" />
        <meta
            name="viewport"
            content="width=device-width, 
                     initial-scale=1.0"/>
        <title>D3.js interpolateReds() function</title>
    </head>
    <style>
        div {
            padding: 5px;
            text-align: center;
            vertical-align: middle;
            display: flex;
            justify-content: center;
            width: fit-content;
            height: 50px;
            float: left;
        }
    </style>
    <body>
        <h2>D3.interpolateReds()</h2>
        <div class="box1">
            <span>
                (0.1)
            </span>
        </div>
        <div class="box2">
            <span>
                (0.2)
            </span>
        </div>
        <div class="box3">
            <span>
                (0.3)
            </span>
        </div>
        <div class="box4">
            <span>
                (0.4)
            </span>
        </div>
        <div class="box5">
            <span>
                (0.5)
            </span>
        </div>
        <div class="b6">
            <span>
                (0.6)
            </span>
        </div>
        <div class="b7">
            <span>
                (0.7)
            </span>
        </div>
        <div class="b8">
            <span>
                (0.8)
            </span>
        </div>
        <div class="b9">
            <span>
                (0.9)
            </span>
        </div>
        <div class="b10">
            <span style="color: honeydew;">
                (1.0)
            </span>
        </div>
        <!--Fetching from CDN of D3.js -->
        <script src=
"https://d3js.org/d3.v4.min.js">
        </script>
        <script src=
"https://d3js.org/d3-color.v1.min.js">
        </script>
        <script src=
"https://d3js.org/d3-interpolate.v1.min.js">
        </script>
        <script src=
"https://d3js.org/d3-scale-chromatic.v1.min.js">
        </script>
        <script>
            // Creating different colors for different
            // Values of t as 0.1,0.2... 1.0
            let color1 = d3.interpolateReds(0.1);
            let color2 = d3.interpolateReds(0.2);
            let color3 = d3.interpolateReds(0.3);
            let color4 = d3.interpolateReds(0.4);
            let color5 = d3.interpolateReds(0.5);
            let color6 = d3.interpolateReds(0.6);
            let color7 = d3.interpolateReds(0.7);
            let color8 = d3.interpolateReds(0.8);
            let color9 = d3.interpolateReds(0.9);
            let color10 = d3.interpolateReds(1.0);
  
            // 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");
            let b6 = document.querySelector(".b6");
            let b7 = document.querySelector(".b7");
            let b8 = document.querySelector(".b8");
            let b9 = document.querySelector(".b9");
            let b10 = document.querySelector(".b10");
  
            // 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;
            b6.style.backgroundColor = color6;
            b7.style.backgroundColor = color7;
            b8.style.backgroundColor = color8;
            b9.style.backgroundColor = color9;
            b10.style.backgroundColor = color10;
        </script>
    </body>
</html>

Producción:

Publicación traducida automáticamente

Artículo escrito por TARuN y traducido por Barcelona Geeks. The original can be accessed here. Licence: CCBY-SA

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