This is a simple JavaScript rate limiter that you can stick in any function

rate-limiter.js

// This script prevents a function from running too frequently.
// Pick one of these three variations, then copy the code to a function of your choice. Do not copy the entire script.

// VARIATION A: Simply ignore any excessive function calls
// VARIATION B: Ignore excessive function calls, but call the function again once the limiter has expired. Ignore parameters.
// VARIATION C: Like variation B, call the function after limiter expired - but pass in function's parameters.


// Variation A ----------------
// Replace 150 with the rate limit amount of your choice.
if ( typeof this.lastCalled == 'undefined' ) this.lastCalled = 0;

var timestamp = new Date().getTime();
if ( this.lastCalled > timestamp - 150 ) {
  return false; 
}else{
  this.lastCalled = timestamp;
}
  
// Varibation B ---------------
// Replace 150 (used twice) with the rate limit amount of your choice.
// Replace ENTER_FUNCTIO_NAME with the name of your function.
// Note: If parameters are being passed in to the function, you will want variation C.
if ( typeof this.lastCalled == 'undefined' ) {
  this.lastCalled = 0;
  this.timeout = false;
}

var timestamp = new Date().getTime();
if ( this.lastCalled > timestamp - 150 ) {
  if ( this.timeout == false ) this.timeout = setTimeout( ENTER_FUNCTION_NAME, 150 );
  return false;
}else{
  this.timeout = false;
  this.lastCalled = timestamp;
}

// Variation C:
// Replace 150 (used twice) with the rate limit amount of your choice.
// Replace ENTER_FUNCTION_NAME with the name of your function
// Replace ENTER_PARAMETER with your parameter(s)
// This code is untested, the closure is probably incorrect within the setTimeout function. But it will get you started.
if ( typeof this.lastCalled == 'undefined' ) {
  this.lastCalled = 0;
  this.timeout = false;
}

var timestamp = new Date().getTime();
if ( this.lastCalled > timestamp - 150 ) {
  if ( this.timeout != false ) clearTimeout( this.timeout );
  this.timeout = setTimeout( function() { ENTER_FUNCTION_NAME( ENTER_PARAMETER ); }, 150 );
  return false; // Function was called within 150ms of a previous call, ignore
}else{
  this.timeout = false;
  this.lastCalled = timestamp; // Function is OK to run, remember the timestamp for next time
}