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what is the difference between throttling and debounce and raf throttling in react

//Throttling prevents a function from being called more than once
//in a given window of time (ms).
throttle(this.handleClick, 1000)

//Debouncing ensures that a function will not be executed until 
//after a certain amount of timehas passed since it was last called. 
debounce(emitChange, 250);