Friday, March 25, 2022
HomeSoftware DevelopmentInstantly Executing setInterval with JavaScript

Instantly Executing setInterval with JavaScript

Using setInterval for situation polling has actually been helpful through the years. Whether or not polling on the consumer or server sides, being reactive to particular situations helps to enhance consumer expertise. One job I just lately wanted to finish required that my setInterval instantly execute after which proceed executing.

The standard and finest strategy to instantly name a operate in the beginning of a setInterval is to truly name the operate earlier than the preliminary setInterval` known as:

setInterval(myFunction, 1000); // Each second

In the event you actually need to isolate the operate name to the setInterval, you should utilize this trick of self-executing operate that returns itself:

// Use a named operate ...
setInterval(operate myFunction() {
  // Do some stuff
  // ...

  // ... then return this operate
  return myFunction;

// () self-executes the operate
}(), 3000)

The down facet to this sample is that it causes a upkeep challenge, the place the following developer does not perceive what’s going on.

Upkeep is a crucial a part of being an excellent engineer, so on the very least, documentation within the type of feedback or a helper operate needs to be required. In the event you actually need to have a self-executing setInterval, you have obtained it!

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