1 files changed, 32 insertions, 0 deletions

diff --git a/assets/site.js b/assets/site.js
new file mode 100644
index 0000000..4e72511
--- /dev/null
+++ b/assets/site.js
@@ -0,0 +1,32 @@
+function settime() {
+  const timestamp = document.querySelector('[data-timestamp-text]')
+  if (!timestamp || !('Intl' in window)) return
+
+  const options = {
+    timeZone: "Asia/Taipei",
+    timeStyle: "short",
+    hour12: false
+  }
+
+  // https://gist.github.com/muan/e7414b6241f088090acd916ed965540e
+  let time = new Intl.DateTimeFormat(navigator.language || "zh-TW", options).format(new Date())
+
+  // https://bugs.chromium.org/p/chromium/issues/detail?id=1262801
+  if (time.match(/^24:/)) time = time.replace('24:', '00:')
+
+  // Setting interpolated string instead of just the time because
+  // if there's no JS there should be no mentions of current time
+  const text = timestamp.getAttribute('data-timestamp-text').replace('{time}', time)
+  timestamp.innerHTML = text.replace(':', '<span class="timestamp-colon" data-colon>:</span>')
+
+  const now = new Date()
+  const sec = now.getSeconds()
+  const secondIsEven = sec % 2 === 0
+  const colon = document.querySelector('[data-colon]')
+  if (colon) colon.style.animationDelay = `${(secondIsEven ? 0 : 1000) - now.getMilliseconds()}ms`
+
+  const delay = 60000 - ((sec * 1000) + now.getMilliseconds())
+  setTimeout(settime, delay)
+}
+
+settime()