vue 判断当前设备

export function detect() {
　　var equipmentType = " ";
　　var agent = navigator.userAgent.toLowerCase();
　　//android ios windows
　　var android = agent.indexOf("android");
　　var iphone = agent.indexOf("iphone");
　　var ipad = agent.indexOf("ipad");
　　var windows = agent.indexOf("windows");
　　var isMac = /macintosh|mac os x/i.test(navigator.userAgent);
　　if (android != -1) {
　　　　equipmentType = "android";
　　}
　　if (iphone != -1 || ipad != -1 || isMac) {
　　　　equipmentType = "ios";
　　}
　　if (windows != -1) {
　　　　equipmentType = "windows";
　　}
　　return equipmentType;
}