每分钟运行一次异步功能

Question

I was planning to get a data from the server every minute. However, if I run this code, this function is being called repeatedly. On the other hand, if I added date.getMilliseconds == 0 in the condition, it won't process any results. Do you have any suggestions on how to run the function once every 1 minute?

async update() {
 var date = new Date();
 if (date.getSeconds() == 0) {
   var newdata = await getData(1);
   array.shift();
   array.push(newdata); 
  }
}

Answer 1

Since it looks like you don't have fine control over when update is called, one option would be to set a boolean to true every time getSeconds() === 0 (set it to false otherwise), and then only run the real code when the flag is false and getSeconds() === 0 :

let hasRun = false;
// ...
async update() {
 var date = new Date();
 const secs = date.getSeconds();
 if (secs !== 0) {
   hasRun = false;
 } else if (secs === 0 && hasRun === false) {
   hasRun = true;
   // your code
   var newdata = await getData(1);
   array.shift();
   array.push(newdata); 
  }
}

An alternative that might require less resources due to not creating Date s every frame would be to have a separate function that toggles the boolean, set with a setInterval that runs every 60 seconds, no Date s involved:

let hasRun = false;
setInterval(() => hasRun = false, 60000);
async update() {
  if (hasRun) return;
  hasRun = true;
  // your code
}

(of course, you could also try setInterval(update, 60000) if the framework allows it)