The d3.interpolateReds() function in D3.js is used to return a range of color in red. In simple words, it returns different shades of red color depending on the integer value given as the parameter.
Syntax:
d3.interpolateReds(t);
Parameters: This function accepts a single parameter as mentioned above and described below:
- t: It is any number in the range 0 to 1.
Return Values: This function returns an RGB color string.
Below examples illustrate the D3.js interpolateReds() function in JavaScript:
Example1:
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= </script> <script src= </script> <script src= </script> <script src= </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> |
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"/> <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= </script> <script src= </script> <script src= </script> <script src= </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> |
Output:
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