Molodetz blogrol volgens DPP-template

2026-10-05 09:36:20 +02:00
commit f290a4c766
277 changed files with 15758 additions and 0 deletions
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+// retoor <retoor@molodetz.nl>
+export class Poller {
+  constructor(fn, intervalMs, { immediate = false, pauseHidden = true } = {}) {
+    this.fn = fn;
+    this.intervalMs = intervalMs;
+    this.immediate = immediate;
+    this.pauseHidden = pauseHidden;
+    this.timer = null;
+    this.busy = false;
+  }
+
+  start() {
+    if (this.timer) {
+      return this;
+    }
+    if (this.immediate) {
+      this.tick();
+    }
+    this.timer = setInterval(() => this.tick(), this.intervalMs);
+    return this;
+  }
+
+  stop() {
+    clearInterval(this.timer);
+    this.timer = null;
+  }
+
+  async tick() {
+    if (this.busy || (this.pauseHidden && document.hidden)) {
+      return;
+    }
+    this.busy = true;
+    try {
+      await this.fn();
+    } catch (error) {
+      console.debug("poller tick failed", error);
+    } finally {
+      this.busy = false;
+    }
+  }
+}