JS工具函数助力高效开发

校验数据类型

export const typeOf = function (obj) {
  return Object.prototype.toString.call(obj).slice(8, -1).toLowerCase();
};

开启全屏

export const launchFullscreen = (element) => {
  if (element.requestFullscreen) {
    element.requestFullscreen();
  } else if (element.mozRequestFullScreen) {
    element.mozRequestFullScreen();
  } else if (element.msRequestFullscreen) {
    element.msRequestFullscreen();
  } else if (element.webkitRequestFullscreen) {
    element.webkitRequestFullScreen();
  }
};

关闭全屏

export const exitFullscreen = () => {
  if (document.exitFullscreen) {
    document.exitFullscreen();
  } else if (document.msExitFullscreen) {
    document.msExitFullscreen();
  } else if (document.mozCancelFullScreen) {
    document.mozCancelFullScreen();
  } else if (document.webkitExitFullscreen) {
    document.webkitExitFullscreen();
  }
};

 大小写转换

export const turnCase = (str, type) => {
  switch (type) {
    case 1:
      return str.toUpperCase();
    case 2:
      return str.toLowerCase();
    case 3:
      //return str[0].toUpperCase() + str.substr(1).toLowerCase() // substr 已不推荐使用
      return str[0].toUpperCase() + str.substring(1).toLowerCase();
    default:
      return str;
  }
};