tool.js

// 获取浏览器语言
export const getLanguage = () => {
  return (navigator.browserLanguage || navigator.language).toLowerCase()
}

/**
 * @desc 函数防抖
 * @param func 函数
 * @param wait 延迟执行毫秒数
 * @param immediate true 表立即执行，false 表非立即执行
 */
export const debounce = (func, wait, immediate) => {
  let timeout;
  return function () {
    let context = this;
    let args = arguments;

    if (timeout) clearTimeout(timeout);
    if (immediate) {
      let callNow = !timeout;
      timeout = setTimeout(() => {
        timeout = null;
      }, wait)
      if (callNow) func.apply(context, args)
    } else {
      timeout = setTimeout(() => {
        func.apply(context, args)
      }, wait);
    }
  }
}

/**
 * @desc 函数节流
 * @param func 函数
 * @param wait 延迟执行毫秒数
 * @param type 1 表时间戳版，2 表定时器版
 */
export const throttle = (func, wait, type) => {
  if (type === 1) {
    var previous = 0;
  } else if (type === 2) {
    var timeout;
  }
  return function () {
    let context = this;
    let args = arguments;
    if (type === 1) {
      let now = Date.now();

      if (now - previous > wait) {
        func.apply(context, args);
        previous = now;
      }
    } else if (type === 2) {
      if (!timeout) {
        timeout = setTimeout(() => {
          timeout = null;
          func.apply(context, args)
        }, wait)
      }
    }
  }
}