javascript - 在 Web Archive 上加载我的代码，JavaScript 无法正常运行

Question

我一直在尝试通过多次查看让我的代码运行良好，比如Web Archive并通过PHProxy 。这是代码:

<select id="mySelect" OnChange="window.location.href=this.value">
    <option>Tagged Stuff and Navigation</option>
</select>

<script>
    if (window.location.href.substring(0, 9) === "http://th") {
        var home_var = "/";
        var bio_var = "/tagged/bio";
        var ask_var = "/ask";
    } else if (window.location.href.substring(0, 9) === "https://p") {
        var home_var = "https://px.multiscreensite.com/index.php?url=blog.tumblr.com";
        var bio_var = "https://px.multiscreensite.com/index.php?url=blog.tumblr.com/tagged/bio";
        var ask_var = "https://px.multiscreensite.com/index.php?url=blog.tumblr.com/ask";
    } else if (window.location.href.substring(0, 9) === "https://w") {
        var home_var = "blog.tumblr.com";
        var bio_var = "blog.tumblr.com/tagged/bio";
        var ask_var = "blog.tumblr.com/ask";
    }
    var select = document.getElementById("mySelect");
    var option = document.createElement("option");
    var option1 = document.createElement("option");
    var option2 = document.createElement("option");

    option.text = "Home Page";
    option.value = home_var;
    select.add(option);

    option1.text = "Autobiographys";
    option1.value = bio_var;
    select.add(option1);

    option2.text = "Ask Me Stuff";
    option2.value = ask_var;
    select.add(option2);
</script>

我的具体问题是，当通过网络文件打开我的页面时，变量从未正确定义，因此所有值都显示为“未定义”。这是网络文件馆的问题吗？或者我可以解决这个问题吗？

Answer 1

window.location.href.substring(0,9) 不包含匹配的字符串。条件未匹配，默认值也未定义，因此该值显示为未定义。

检查

console.log(window.location.href.substring(0, 9));

这是我尝试过的

<select id="mySelect" OnChange="window.location.href=this.value">
    <option>Tagged Stuff and Navigation</option>
</select>

<script>
    var home_var = "";
    var bio_var = "";
    var ask_var = "";
    // Check your variable
    console.log(window.location.href.substring(0, 9));
    if (window.location.href.substring(0, 9) === "http://th") {
        home_var = "/";
        bio_var = "/tagged/bio";
        ask_var = "/ask";
    } else if (window.location.href.substring(0, 9) === "https://p") {
        home_var = "https://px.multiscreensite.com/index.php?url=blog.tumblr.com";
        bio_var = "https://px.multiscreensite.com/index.php?url=blog.tumblr.com/tagged/bio";
        ask_var = "https://px.multiscreensite.com/index.php?url=blog.tumblr.com/ask";
    } else if (window.location.href.substring(0, 9) === "https://w") {
        home_var = "blog.tumblr.com";
        bio_var = "blog.tumblr.com/tagged/bio";
        ask_var = "blog.tumblr.com/ask";
    } else {
        //Set Default Values
        home_var = "default home var";
        bio_var = "default home var";
        ask_var = "default home var";
    }
    var select = document.getElementById("mySelect");
    var option = document.createElement("option");
    var option1 = document.createElement("option");
    var option2 = document.createElement("option");

    option.text = "Home Page";
    option.value = home_var;
    select.add(option);

    option1.text = "Autobiographys";
    option1.value = bio_var;
    select.add(option1);

    option2.text = "Ask Me Stuff";
    option2.value = ask_var;
    select.add(option2);
</script>