◆ 注意事項： 以下程式必須放在HTML head > meta > titile 之後的第一時間執行
◆ split("/")技術細節說明
※web url sample: https://a.b.c/web_root/language/real_root/sub_folder
※web_root == folder of: desktop, mobile, ftp, ...
※language == en, tw, cn, ...
※real_root == index.html, index.php, folder name of project, css, imgs, js, ...
aUrl[0] == https:
aUrl[1] == null
aUrl[2] == a.b.c
aUrl[3] == web_root
...
◆ Javascript Source Code
<script>
// web url sample: https://a.b.c/web_root/language/real_root/sub_folder
var sOriginUrl = document.URL;
var aUrl = sOriginUrl.split("/");
if (aUrl[3] === "desktop" && (aUrl[4] === "" || typeof aUrl[4] == "undefined")){
window.location = "/desktop/<language>";
} else if (aUrl[3] === "mobile" && (aUrl[4] === "" || typeof aUrl[4] == "undefined")){
window.location = "/mobile/<language>";
}
var gotoNewWebLocation = function() {
var w = window,
d = document,
b = d.getElementsByTagName("body")[0],
e = d.documentElement,
x = e.clientWidth || b.clientWidth,
y = e.clientHeight || b.clientHeight;
// 舊手機規格以「768px-1」為判斷依據。Bootstrap 4 已改為「1200px-1」
// 本人建議，仍須考量幾個手機螢幕規格的判斷點：
// 1440x810, 1600x900, 1920x1080, 2560x1440
// 其中，以 1920 x 1080 為門檻（人類視覺只要超過1920px就無法分辨出差別)
// 注意 n == 所要判斷字串的字數，若是en, tw 則是 2
if (x <= 767) { // or 1079
if (aUrl[3] == "desktop" && aUrl[4].substr(0,n) == "<language>" ) window.location = "/mobile/<language>";
} else {
if (aUrl[3] == "mobile" && aUrl[4].substr(0,n) == "<language>") window.location = "/desktop/<language>";
}
};
gotoNewWebLocation();
if (window.addEventListener) {
window.addEventListener("resize", gotoNewWebLocation);
window.addEventListener("orientationchange", gotoNewWebLocation);
} else if (window.attachEvent) { // 相容IE事件
window.attachEvent("onresize", gotoNewWebLocation);
}
</script>
