前端-判断浏览器类型

console.log(isweb());
function isweb() {
var userAgent = navigator.userAgent; //取得浏览器的userAgent字符串
var isOpera = userAgent.indexOf(“OPR”) > -1;
if (isOpera) { return “Opera” }; //判断是否Opera浏览器PR/43.0.2442.991
if (userAgent.indexOf(“Firefox”) > -1) { return “FF”; } //判断是否Firefox浏览器 Firefox/51.0
if (userAgent.indexOf(“Trident”) > -1) { return “IE”; } //判断是否IE浏览器 Trident/7.0; rv:11.0
if (userAgent.indexOf(“Edge”) > -1) { return “Edge”; } //判断是否Edge浏览器 Edge/14.14393
if (userAgent.indexOf(“Chrome”) > -1) { return “Chrome”; }// Chrome/56.0.2924.87
if (userAgent.indexOf(“Safari”) > -1) { return “Safari”; } //判断是否Safari浏览
}