javascript - 如果输入值为字符串，则更改窗口位置

Question

我正在尝试制作一个迷你 Google。您在 Facebook 或 Instagram 中输入的地方，当您单击“搜索”按钮时，您将被发送到该页面。到目前为止，我已经得到了这个，但它只会转到 Facebook。

var btn = document.getElementById("btn");
var search = document.getElementById("search")

btn.onclick = function (){

    if (search.value == "Facebook" || "facebook"){
        window.location = "https://www.facebook.com/";

    } else if( search.value == "Instagram" || "instagram"){
        window.location = "https://www.instagram.com/";
    }
}

<input id="search" type="text"/>
<button id="btn" type="button">Search</button>

Answer 1

问题出在你的if上，if (search.value == "Facebook"|| "facebook")就像在说

if search.value == "Facebook" is true, or "facebook" is true, do

这是行不通的，因为 "facebook" 将始终为真，因此永远不会输入 Instagram 的第二个 if。

相反，你想要的是

if search.value == "Facebook" is true, or if search.value == "facebook" is true, do

var btn = document.getElementById("btn");
var search = document.getElementById("search")

btn.onclick = function (){

    if (search.value == "Facebook" || search.value == "facebook"){
        window.location = "https://www.facebook.com/";

    } else if( search.value == "Instagram" || search.value == "instagram"){
        window.location = "https://www.instagram.com/";
    }
}

<input id="search" type="text"/>
<button id="btn" type="button">Search</button>