检查浏览器版本的js

function checkBrowserVersion() {
  var userAgent = navigator.userAgent;
  var browserName = "";
  var browserVersion = "";

  if (userAgent.indexOf("Firefox") > -1) {
    browserName = "Mozilla Firefox";
    browserVersion = userAgent.substring(userAgent.indexOf("Firefox") + 8);
  } else if (userAgent.indexOf("Chrome") > -1) {
    browserName = "Google Chrome";
    browserVersion = userAgent.substring(userAgent.indexOf("Chrome") + 7);
  } else if (userAgent.indexOf("Safari") > -1) {
    browserName = "Apple Safari";
    browserVersion = userAgent.substring(userAgent.indexOf("Version") + 8);
  } else if (userAgent.indexOf("Opera") > -1 || userAgent.indexOf("OPR") > -1) {
    browserName = "Opera";
    if (userAgent.indexOf("OPR") > -1) {
      browserVersion = userAgent.substring(userAgent.indexOf("OPR") + 4);
    } else {
      browserVersion = userAgent.substring(userAgent.indexOf("Opera") + 6);
    }
  } else if (userAgent.indexOf("MSIE") > -1 || userAgent.indexOf("Trident/") > -1) {
    browserName = "Microsoft Internet Explorer";
    if (userAgent.indexOf("MSIE") > -1) {
      browserVersion = userAgent.substring(userAgent.indexOf("MSIE") + 5);
    } else {
      browserVersion = userAgent.substring(userAgent.indexOf("rv") + 3);
    }
  }

  return {
    name: browserName,
    version: browserVersion
  };
}

var browser = checkBrowserVersion();
console.log("浏览器名称: " + browser.name);
console.log("浏览器版本: " + browser.version);