Returns a function, that, as long as it continues to be invoked, will not be triggered. The function will be called after it stops being called for wait milliseconds. If immediate is passed, trigger the function on the leading edge, instead of the trailing.

Returns a function, that, when invoked, will only be triggered at most once during a given window of time. Normally, the throttled function will run as much as it can, without ever going more than once per wait duration. If you would like to disable the execution on the leading edge, pass {leading: false} as the options parameter. To disable execution on the trailing edge, pass {trailing: false} as the options parameter.

This function comes from underscore.js and is the same exact implementation.