9888拉斯维加斯
const ua = navigator.userAgent;
const isIE = /IE\/(\d+)/.test(ua);
const isOldEdge = /Edge\/(\d+)/.test(ua) && RegExp.$1 < 79;
const isOldChrome = /Chrome\/(\d+)/.test(ua) && RegExp.$1 < 51;
const isOldOpera = /Opera\/(\d+)/.test(ua) && RegExp.$1 < 38;
const isOldFirefox = /Firefox\/(\d+)/.test(ua) && RegExp.$1 < 54;
const isOldSafari = /Safari\/(\d+)/.test(ua) && RegExp.$1 < 10;
/* 如果是ie浏览器 */
if (!!window.ActiveXObject || "ActiveXObject" in window || isOldEdge || isOldChrome|| isIE|| isOldOpera|| isOldFirefox|| isOldSafari) {
document.querySelector('.tip').style.display = 'block'
}9888拉斯维加斯