Create Timeout Cancellation

Author: letsdeepchat

Diff for: Timeout Cancellation

@@ -0,0 +1,33 @@
+function cancellable(fn: Function, args: any[], t: number): Function {
+    const cancelFn: any = () => clearTimeout(timer);
+    const timer: ReturnType<typeof setTimeout> = setTimeout(() => {
+        fn(...args);
+    }, t);
+    return cancelFn;
+};
+
+/**
+ *  const result = []
+ *
+ *  const fn = (x) => x * 5
+ *  const args = [2], t = 20, cancelT = 50
+ *
+ *  const start = performance.now() 
+ *
+ *  const log = (...argsArr) => {
+ *      const diff = Math.floor(performance.now() - start);
+ *      result.push({"time": diff, "returned": fn(...argsArr)})
+ *  }
+ *       
+ *  const cancel = cancellable(log, args, t);
+ *
+ *  const maxT = Math.max(t, cancelT)
+ *           
+ *  setTimeout(() => {
+ *     cancel()
+ *  }, cancelT)
+ *
+ *  setTimeout(() => {
+ *     console.log(result) // [{"time":20,"returned":10}]
+ *  }, maxT + 15)
+ */