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移除书签Geolocation: Custom Styling
Personalize website styling based on localized user time.
Last updated Apr 23, 2026 If you want to get started quickly, click on the button below.
This creates a repository in your GitHub account and deploys the application to Cloudflare Workers.
export default {
async fetch(request) {
let grads = [
[
{ color: "00000c", position: 0 },
{ color: "00000c", position: 0 },
],
[
{ color: "020111", position: 85 },
{ color: "191621", position: 100 },
],
[
{ color: "020111", position: 60 },
{ color: "20202c", position: 100 },
],
[
{ color: "020111", position: 10 },
{ color: "3a3a52", position: 100 },
],
[
{ color: "20202c", position: 0 },
{ color: "515175", position: 100 },
],
[
{ color: "40405c", position: 0 },
{ color: "6f71aa", position: 80 },
{ color: "8a76ab", position: 100 },
],
[
{ color: "4a4969", position: 0 },
{ color: "7072ab", position: 50 },
{ color: "cd82a0", position: 100 },
],
[
{ color: "757abf", position: 0 },
{ color: "8583be", position: 60 },
{ color: "eab0d1", position: 100 },
],
[
{ color: "82addb", position: 0 },
{ color: "ebb2b1", position: 100 },
],
[
{ color: "94c5f8", position: 1 },
{ color: "a6e6ff", position: 70 },
{ color: "b1b5ea", position: 100 },
],
[
{ color: "b7eaff", position: 0 },
{ color: "94dfff", position: 100 },
],
[
{ color: "9be2fe", position: 0 },
{ color: "67d1fb", position: 100 },
],
[
{ color: "90dffe", position: 0 },
{ color: "38a3d1", position: 100 },
],
[
{ color: "57c1eb", position: 0 },
{ color: "246fa8", position: 100 },
],
[
{ color: "2d91c2", position: 0 },
{ color: "1e528e", position: 100 },
],
[
{ color: "2473ab", position: 0 },
{ color: "1e528e", position: 70 },
{ color: "5b7983", position: 100 },
],
[
{ color: "1e528e", position: 0 },
{ color: "265889", position: 50 },
{ color: "9da671", position: 100 },
],
[
{ color: "1e528e", position: 0 },
{ color: "728a7c", position: 50 },
{ color: "e9ce5d", position: 100 },
],
[
{ color: "154277", position: 0 },
{ color: "576e71", position: 30 },
{ color: "e1c45e", position: 70 },
{ color: "b26339", position: 100 },
],
[
{ color: "163C52", position: 0 },
{ color: "4F4F47", position: 30 },
{ color: "C5752D", position: 60 },
{ color: "B7490F", position: 80 },
{ color: "2F1107", position: 100 },
],
[
{ color: "071B26", position: 0 },
{ color: "071B26", position: 30 },
{ color: "8A3B12", position: 80 },
{ color: "240E03", position: 100 },
],
[
{ color: "010A10", position: 30 },
{ color: "59230B", position: 80 },
{ color: "2F1107", position: 100 },
],
[
{ color: "090401", position: 50 },
{ color: "4B1D06", position: 100 },
],
[
{ color: "00000c", position: 80 },
{ color: "150800", position: 100 },
],
];
async function toCSSGradient(hour) {
let css = "linear-gradient(to bottom,";
const data = grads[hour];
const len = data.length;
for (let i = 0; i < len; i++) {
const item = data[i];
css += ` #${item.color} ${item.position}%`;
if (i < len - 1) css += ",";
}
return css + ")";
}
let html_content = "";
let html_style = `
html{width:100vw; height:100vh;}
body{padding:0; margin:0 !important;height:100%;}
#container {
display: flex;
flex-direction:column;
align-items: center;
justify-content: center;
height: 100%;
color:white;
font-family:sans-serif;
}`;
const timezone = request.cf.timezone;
console.log(timezone);
let localized_date = new Date(
new Date().toLocaleString("en-US", { timeZone: timezone }),
);
let hour = localized_date.getHours();
let minutes = localized_date.getMinutes();
html_content += "<h1>" + hour + ":" + minutes + "</h1>";
html_content += "<p>" + timezone + "<br/></p>";
html_style += "body{background:" + (await toCSSGradient(hour)) + ";}";
let html = `
<!DOCTYPE html>
<head>
<title>Geolocation: Customized Design</title>
</head>
<body>
<style> ${html_style}</style>
<div id="container">
${html_content}
</div>
</body>`;
return new Response(html, {
headers: { "content-type": "text/html;charset=UTF-8" },
});
},
};
export default {
async fetch(request): Promise<Response> {
let grads = [
[
{ color: "00000c", position: 0 },
{ color: "00000c", position: 0 },
],
[
{ color: "020111", position: 85 },
{ color: "191621", position: 100 },
],
[
{ color: "020111", position: 60 },
{ color: "20202c", position: 100 },
],
[
{ color: "020111", position: 10 },
{ color: "3a3a52", position: 100 },
],
[
{ color: "20202c", position: 0 },
{ color: "515175", position: 100 },
],
[
{ color: "40405c", position: 0 },
{ color: "6f71aa", position: 80 },
{ color: "8a76ab", position: 100 },
],
[
{ color: "4a4969", position: 0 },
{ color: "7072ab", position: 50 },
{ color: "cd82a0", position: 100 },
],
[
{ color: "757abf", position: 0 },
{ color: "8583be", position: 60 },
{ color: "eab0d1", position: 100 },
],
[
{ color: "82addb", position: 0 },
{ color: "ebb2b1", position: 100 },
],
[
{ color: "94c5f8", position: 1 },
{ color: "a6e6ff", position: 70 },
{ color: "b1b5ea", position: 100 },
],
[
{ color: "b7eaff", position: 0 },
{ color: "94dfff", position: 100 },
],
[
{ color: "9be2fe", position: 0 },
{ color: "67d1fb", position: 100 },
],
[
{ color: "90dffe", position: 0 },
{ color: "38a3d1", position: 100 },
],
[
{ color: "57c1eb", position: 0 },
{ color: "246fa8", position: 100 },
],
[
{ color: "2d91c2", position: 0 },
{ color: "1e528e", position: 100 },
],
[
{ color: "2473ab", position: 0 },
{ color: "1e528e", position: 70 },
{ color: "5b7983", position: 100 },
],
[
{ color: "1e528e", position: 0 },
{ color: "265889", position: 50 },
{ color: "9da671", position: 100 },
],
[
{ color: "1e528e", position: 0 },
{ color: "728a7c", position: 50 },
{ color: "e9ce5d", position: 100 },
],
[
{ color: "154277", position: 0 },
{ color: "576e71", position: 30 },
{ color: "e1c45e", position: 70 },
{ color: "b26339", position: 100 },
],
[
{ color: "163C52", position: 0 },
{ color: "4F4F47", position: 30 },
{ color: "C5752D", position: 60 },
{ color: "B7490F", position: 80 },
{ color: "2F1107", position: 100 },
],
[
{ color: "071B26", position: 0 },
{ color: "071B26", position: 30 },
{ color: "8A3B12", position: 80 },
{ color: "240E03", position: 100 },
],
[
{ color: "010A10", position: 30 },
{ color: "59230B", position: 80 },
{ color: "2F1107", position: 100 },
],
[
{ color: "090401", position: 50 },
{ color: "4B1D06", position: 100 },
],
[
{ color: "00000c", position: 80 },
{ color: "150800", position: 100 },
],
];
async function toCSSGradient(hour) {
let css = "linear-gradient(to bottom,";
const data = grads[hour];
const len = data.length;
for (let i = 0; i < len; i++) {
const item = data[i];
css += ` #${item.color} ${item.position}%`;
if (i < len - 1) css += ",";
}
return css + ")";
}
let html_content = "";
let html_style = `
html{width:100vw; height:100vh;}
body{padding:0; margin:0 !important;height:100%;}
#container {
display: flex;
flex-direction:column;
align-items: center;
justify-content: center;
height: 100%;
color:white;
font-family:sans-serif;
}`;
const timezone = request.cf.timezone;
console.log(timezone);
let localized_date = new Date(
new Date().toLocaleString("en-US", { timeZone: timezone }),
);
let hour = localized_date.getHours();
let minutes = localized_date.getMinutes();
html_content += "<h1>" + hour + ":" + minutes + "</h1>";
html_content += "<p>" + timezone + "<br/></p>";
html_style += "body{background:" + (await toCSSGradient(hour)) + ";}";
let html = `
<!DOCTYPE html>
<head>
<title>Geolocation: Customized Design</title>
</head>
<body>
<style> ${html_style}</style>
<div id="container">
${html_content}
</div>
</body>`;
return new Response(html, {
headers: { "content-type": "text/html;charset=UTF-8" },
});
},
} satisfies ExportedHandler;
import { Hono } from 'hono';
type Bindings = {};
type ColorStop = { color: string; position: number };
const app = new Hono<{ Bindings: Bindings }>();
// Gradient configurations for each hour of the day (0-23)
const grads: ColorStop[][] = [
[
{ color: "00000c", position: 0 },
{ color: "00000c", position: 0 },
],
[
{ color: "020111", position: 85 },
{ color: "191621", position: 100 },
],
[
{ color: "020111", position: 60 },
{ color: "20202c", position: 100 },
],
[
{ color: "020111", position: 10 },
{ color: "3a3a52", position: 100 },
],
[
{ color: "20202c", position: 0 },
{ color: "515175", position: 100 },
],
[
{ color: "40405c", position: 0 },
{ color: "6f71aa", position: 80 },
{ color: "8a76ab", position: 100 },
],
[
{ color: "4a4969", position: 0 },
{ color: "7072ab", position: 50 },
{ color: "cd82a0", position: 100 },
],
[
{ color: "757abf", position: 0 },
{ color: "8583be", position: 60 },
{ color: "eab0d1", position: 100 },
],
[
{ color: "82addb", position: 0 },
{ color: "ebb2b1", position: 100 },
],
[
{ color: "94c5f8", position: 1 },
{ color: "a6e6ff", position: 70 },
{ color: "b1b5ea", position: 100 },
],
[
{ color: "b7eaff", position: 0 },
{ color: "94dfff", position: 100 },
],
[
{ color: "9be2fe", position: 0 },
{ color: "67d1fb", position: 100 },
],
[
{ color: "90dffe", position: 0 },
{ color: "38a3d1", position: 100 },
],
[
{ color: "57c1eb", position: 0 },
{ color: "246fa8", position: 100 },
],
[
{ color: "2d91c2", position: 0 },
{ color: "1e528e", position: 100 },
],
[
{ color: "2473ab", position: 0 },
{ color: "1e528e", position: 70 },
{ color: "5b7983", position: 100 },
],
[
{ color: "1e528e", position: 0 },
{ color: "265889", position: 50 },
{ color: "9da671", position: 100 },
],
[
{ color: "1e528e", position: 0 },
{ color: "728a7c", position: 50 },
{ color: "e9ce5d", position: 100 },
],
[
{ color: "154277", position: 0 },
{ color: "576e71", position: 30 },
{ color: "e1c45e", position: 70 },
{ color: "b26339", position: 100 },
],
[
{ color: "163C52", position: 0 },
{ color: "4F4F47", position: 30 },
{ color: "C5752D", position: 60 },
{ color: "B7490F", position: 80 },
{ color: "2F1107", position: 100 },
],
[
{ color: "071B26", position: 0 },
{ color: "071B26", position: 30 },
{ color: "8A3B12", position: 80 },
{ color: "240E03", position: 100 },
],
[
{ color: "010A10", position: 30 },
{ color: "59230B", position: 80 },
{ color: "2F1107", position: 100 },
],
[
{ color: "090401", position: 50 },
{ color: "4B1D06", position: 100 },
],
[
{ color: "00000c", position: 80 },
{ color: "150800", position: 100 },
],
];
// Convert hour to CSS gradient
async function toCSSGradient(hour: number): Promise<string> {
let css = "linear-gradient(to bottom,";
const data = grads[hour];
const len = data.length;
for (let i = 0; i < len; i++) {
const item = data[i];
css += ` #${item.color} ${item.position}%`;
if (i < len - 1) css += ",";
}
return css + ")";
}
app.get('*', async (c) => {
const request = c.req.raw;
// Base HTML style
let html_style = `
html{width:100vw; height:100vh;}
body{padding:0; margin:0 !important;height:100%;}
#container {
display: flex;
flex-direction:column;
align-items: center;
justify-content: center;
height: 100%;
color:white;
font-family:sans-serif;
}`;
// Get timezone from Cloudflare request
const timezone = request.cf?.timezone || 'UTC';
console.log(timezone);
// Get localized time
let localized_date = new Date(
new Date().toLocaleString("en-US", { timeZone: timezone })
);
let hour = localized_date.getHours();
let minutes = localized_date.getMinutes();
// Generate HTML content
let html_content = `<h1>${hour}:${minutes}</h1>`;
html_content += `<p>${timezone}<br/></p>`;
// Add background gradient based on hour
html_style += `body{background:${await toCSSGradient(hour)};}`;
// Complete HTML document
let html = `
<!DOCTYPE html>
<head>
<title>Geolocation: Customized Design</title>
</head>
<body>
<style>${html_style}</style>
<div id="container">
${html_content}
</div>
</body>`;
return c.html(html);
});
export default app;
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{"@context":"https://schema.org","@type":"TechArticle","@id":"https://developers.cloudflare.com/workers/examples/geolocation-custom-styling/#page","headline":"Geolocation: Custom Styling","description":"Personalize website styling based on localized user time.","url":"https://developers.cloudflare.com/workers/examples/geolocation-custom-styling/","inLanguage":"en","image":"https://developers.cloudflare.com/workers/examples/geolocation-custom-styling/og.png?v=6862e2c3f7438877","dateModified":"2026-04-23","publisher":{"@type":"Organization","name":"Cloudflare","description":"One platform for your apps, agents, and workforce. Build, secure, and scale without managing infrastructure","url":"https://www.cloudflare.com/","sameAs":["https://github.com/cloudflare","https://www.linkedin.com/company/cloudflare","https://x.com/cloudflare"],"logo":{"@type":"ImageObject","url":"https://developers.cloudflare.com/logo.svg"},"address":{"@type":"PostalAddress","streetAddress":"101 Townsend St","addressLocality":"San Francisco","addressRegion":"CA","postalCode":"94107","addressCountry":"US"},"contactPoint":[{"@type":"ContactPoint","contactType":"Customer Support","url":"https://support.cloudflare.com/","availableLanguage":["English"]},{"@type":"ContactPoint","contactType":"Sales","url":"https://www.cloudflare.com/contact/","availableLanguage":["English"]}]},"isPartOf":{"@type":"WebSite","@id":"https://developers.cloudflare.com/#website","name":"Cloudflare Docs","url":"https://developers.cloudflare.com/"},"keywords":["Geolocation","JavaScript","TypeScript"]}
description: Get all geolocation data fields and display them in HTML. title: "Geolocation: Hello World" image: https://developers.cloudflare.com/workers/examples/geolocation-hello-world/og.png?v=8d59e46cdb7da53b
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