Auto Reload Local ESP8266 Web Server

Using Arduino Project Guidance
1

How to auto-reload my local ESP8266 Web Server every 1 second? For now I can only refresh manually to view the real live data.

2

Find a HTML tutorial.

3

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4

In HTML i add
<meta http-equiv=refresh content=2>
and the browser auto reload page every 2 secs.

5 
// setup()
server.on("/", []() { 
     server.send(200, "text/html", index_html); 
});

  server.on("/data", []() {
    String dataJson = "{ \"name\": \"" + my_name + "\" , \"age\" : " + String(age) + "}";
    server.send(200, "application/json", dataJson ); 
});

// loop()
server.handleClient();


// Javascript
async function UpdateDoc() {
    await fetch('/data', {
        method: 'GET',
      }, 5000)
      .then(async r => await r.json())
      .then(async d => {
        const dt = d;
        console.log(dt)
      })
  }
6

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