@vuetify/nightly/lib/util/throttle.js

Vue Material Component Framework

export function throttle(fn, delay) {
  let options = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : {
    leading: true,
    trailing: true
  };
  let timeoutId = 0;
  let lastExec = 0;
  let throttling = false;
  let start = 0;
  function clear() {
    clearTimeout(timeoutId);
    throttling = false;
    start = 0;
  }
  const wrap = function () {
    for (var _len = arguments.length, args = new Array(_len), _key = 0; _key < _len; _key++) {
      args[_key] = arguments[_key];
    }
    clearTimeout(timeoutId);
    const now = Date.now();
    if (!start) start = now;
    const elapsed = now - Math.max(start, lastExec);
    function invoke() {
      lastExec = Date.now();
      timeoutId = setTimeout(clear, delay);
      fn(...args);
    }
    if (!throttling) {
      throttling = true;
      if (options.leading) {
        invoke();
      }
    } else if (elapsed >= delay) {
      invoke();
    } else if (options.trailing) {
      timeoutId = setTimeout(invoke, delay - elapsed);
    }
  };
  wrap.clear = clear;
  wrap.immediate = fn;
  return wrap;
}
//# sourceMappingURL=throttle.js.map