Question

我用于返回html文档使用的当前浏览器版本的代码返回NaN。我已经完成了代码，对此感觉还不错，但是navigator.useragent没有返回正确的输出。

/// javascript
function getBrowserName() {
    var lsBrowser = navigator.userAgent;

    if (lsBrowser.indexOf("MSIE") >= 0) {
        return "MSIE";
    } else if (lsBrowser.indexOf("Firefox") >= 0) {
        return "Firefox";
    } else if (lsBrowser.indexOf("Chrome") >= 0) {
        return "Chrome";
    } else if (lsBrowser.indexOf("Safari") >= 0) {
        return "Safari";
    } else if (lsBrowser.indexOf("Opera") >= 0) {
        return "Opera";
    } else {
        return "UNKNOWN";
    }
}

function getBrowserVersion() {
    var ua = navigator.userAgent;
    var browser = getBrowserName();
    var findIndex = ua.indexOf(browser) + browser.length + 1;
    var browserVersion = parseFloat(ua.substring(findIndex, findIndex +3));

    return browserVersion;
}
var browserName = getBrowserName();
var browserVersion = getBrowserVersion();
var windowHeight = window.screen.availHeight;
var windowWidth = window.screen.availWidth;

 document.write("You are using " + browserVersion + " version of the "
 + browserName + " browser to view this page in a browser whose inner" + 
 " window that is" + windowWidth + " pixels wide and " +
 windowHeight + " pixels tall.");

/// html doc
<!DOCTYPE html>
<html lan= "en">
<head>
    <title> Chapter 8 Browser Sniffing</title>
</head>
<body>
    <script src = "browserSniffing.js"></script>
</body>
</html>

我希望我的代码能填补以下空白：您正在使用____________浏览器的_________版本在其内部窗口宽_____像素和_____像素的浏览器中查看此页面。它充满了他们。但是getBrowserVersion函数返回NaN。也许有人会就如何稍微调整此代码以使其正常工作提供一些建议。

Answer 1

尝试一下：

/// javascript
function getBrowserName() {
    var lsBrowser = navigator.userAgent;
debugger
    if (lsBrowser.indexOf("MSIE") >= 0) {
        return "MSIE";
    } else if (lsBrowser.indexOf("Firefox") >= 0) {
        return "Firefox";
    } else if (lsBrowser.indexOf("Chrome") >= 0) {
        return "Chrome";
    } else if (lsBrowser.indexOf("Safari") >= 0) {
        return "Safari";
    } else if (lsBrowser.indexOf("Opera") >= 0) {
        return "Opera";
    } else {
        return "UNKNOWN";
    }
}

function getBrowserVersion() {
  debugger
    var ua = navigator.userAgent;
    var browser = getBrowserName();
    var findIndex = ua.indexOf(browser) + browser.length + 1;
    var browserVersion = parseFloat(ua.substring(findIndex, findIndex +3));

    return browserVersion;
}
var browserName = getBrowserName();
var browserVersion = getBrowserVersion();
var windowHeight = window.screen.availHeight;
var windowWidth = window.screen.availWidth;

 document.write("You are using " + browserVersion + " version of the "
 + browserName + " browser to view this page in a browser whose inner" + 
 " window that is" + windowWidth + " pixels wide and " +
 windowHeight + " pixels tall.");

<!DOCTYPE html>
<html lan= "en">
<head>
    <title> Chapter 8 Browser Sniffing</title>
</head>
<body>
    <script src = "browserSniffing.js"></script>
</body>
</html>

导航器：使用JS创建HTML来获取浏览器的版本/名称/高度/宽度

1 个答案: