Debounce function

debounce.js

const debounce = (func, wait, immediate) => {
    let timeout

    return function() {
      const context = this
      const args = arguments

      const later = () => {
        timeout = null
        if(!immediate) func.apply(context, args)
      }

      const callNow = immediate && !timeout
      clearTimeout(timeout)
      timeout = setTimeout(later, wait)
      if(callNow) func.apply(context, args)
    }
  }

// You can call the function like this:
// $(someElement).keyup(debounce(yourFunction, DEBOUNCE_TIME))