How Can I Access `this` Correctly Inside a JavaScript `setInterval` Handler?

Accessing this from a JavaScript setInterval Handler

When using setInterval in JavaScript, it can be challenging to access the object instance (this) within the handler function. This is because setInterval creates a new context for the handler function.

To resolve this issue, we can bind the handler to the object instance, ensuring that it has access to the this keyword. Here's how:

this.intervalID = setInterval(this.retrieve_rate.bind(this), this.INTERVAL);

In this modified code, the bind method is used to create a new function that is bound to the current object instance. This function is then passed as the handler to setInterval.

Within the retrieve_rate handler function, you now have access to the this keyword and can use it to access the prefs property:

retrieve_rate: function() {
  // access prefs here
  // this.prefs
}

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