flo-utils/es/throttle.js

some utils

/*
 * @File: throttle.js
 * @Project: events-more-trigger
 * @File Created: Friday, 10th August 2018 2:07:45 pm
 * @Author: NARUTOne (wznaruto326@163.com/wznarutone326@gamil.com)
 * -----
 * @Last Modified: Friday, 10th August 2018 2:07:51 pm
 * @Modified By: NARUTOne (wznaruto326@163.com/wznarutone326@gamil.com>)
 * -----
 * @Copyright <<projectCreationYear>> - 2018 bairong, bairong
 * @fighting: code is far away from bug with the animal protecting
 *  ┏┓      ┏┓
 *  ┏┛┻━━━┛┻┓
 *  |           |
 *  |     ━    |
 *  |  ┳┛ ┗┳ |
 *  |          |
 *  |     ┻   |
 *  |           |
 *  ┗━┓     ┏━┛
 *     |      | 神兽保佑
 *     |      | 代码无BUG！！！
 *     |      ┗━━━┓
 *     |            ┣┓
 *     |            ┏┛
 *     ┗┓┓ ┏━┳┓┏┛
 *      |┫┫   |┫┫
 *      ┗┻┛   ┗┻┛
 */

/**
 * @name throttle, 节流函数，（高频操作，性能优化）
 * @param {*} func
 * @param {number} [wait = 300]
 * @returns
 * @example
 *
 const throttleAjax = throttle((newParams)=>{
  return new Promise((resolve, reject) => {
    xhr({
      url: '/api',
      type: 'POST',
      data: newParams,
      success: res => {
        const {data} = res;
        const arr = isArray(data) ? data : [];
        resolve(arr);
      },
      error: err => {
        reject(err);
      }
    });
  });
}, 300);

export function apiExample (params) {
  const newParams = filterParams(params);
  return new Promise((resolve) => {
    const keys = Object.keys(newParams);
    if (!keys.length) {
      resolve([]);
    } else {
      throttleAjax(newParams).then(res => {
        resolve(res);
      });
    }
  });
}
 */
function throttle(func) {
  var _this = this;

  var wait = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : 300;
  var timeout;
  return function () {
    for (var _len = arguments.length, args = new Array(_len), _key = 0; _key < _len; _key++) {
      args[_key] = arguments[_key];
    }

    var context = _this;
    return new Promise(function (resolve) {
      if (!timeout) {
        timeout = setTimeout(function () {
          timeout = null;
          resolve(func.apply(context, args));
        }, wait);
      }
    });
  };
}

export default throttle;