vanjs-org.github.io/assert/code/epoch-converter.html at b3c6994aab0bf78fb9d9945f5e5f0fb82f09603a · vanjs-org/vanjs-org.github.io · GitHub

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<!DOCTYPE html>
<html>
  <head>
    <link rel="icon" href="/logo.svg">
    <title>Echo Converter</title>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1">
  </head>
  <body>
    <script type="module">
      import van from "./van-latest.min.js"

      const {b, button, div, i, input, p} = van.tags

      const tsToDate = ts =>
        ts < 1e10 ? new Date(ts * 1e3) :
        ts < 1e13 ? new Date(ts) :
        ts < 1e16 ? new Date(ts / 1e3) :
        new Date(ts / 1e6)

      const Converter = () => {
        const nowTs = van.state(Math.floor(new Date().getTime() / 1e3)), date = van.state(null)
        setInterval(() => ++nowTs.val, 1000)
        const inputDom = input({type: "text", size: 25, value: nowTs.val})
        return div(
          div(b("Now: "), nowTs),
          inputDom, " ",
          button({onclick: () => date.val = tsToDate(Number(inputDom.value))}, "Convert"),
          p(i("Supports Unix timestamps in seconds, milliseconds, microseconds and nanoseconds.")),
          () => date.val ? p(
            div(date.val.toString()),
            div(b("GMT: "), date.val.toGMTString()),
          ) : p(),
        )
      }

      van.add(document.body, Converter())
    </script>
  </body>
</html>