Source: windowResize.js

/**
 *
 * @desc H5软键盘缩回、弹起回调
 * 当软件键盘弹起会改变当前 window.innerHeight，监听这个值变化
 * @param {Function} downCb 当软键盘弹起后，缩回的回调
 * @param {Function} upCb 当软键盘弹起的回调
 */

function windowResize(downCb, upCb) {
  var clientHeight = window.innerHeight;
  downCb = typeof downCb === "function" ? downCb : function() {};
  upCb = typeof upCb === "function" ? upCb : function() {};
  window.addEventListener("resize", () => {
    var height = window.innerHeight;
    if (height === clientHeight) {
      downCb();
    }
    if (height < clientHeight) {
      upCb();
    }
  });
}

module.exports = windowResize;