How to set class name of current anchor from js file?-CodePudding

I have written this simple js code to render two anchor elements to the html files.

//<a href="a1link,html">Link1</a>
let aElement1 = document.createElement("a");
aElement1.href = "a1link.html";
aElement1.innerHTML = "Link1";
document.body.appendChild(aElement1);

//<a href="a2link.html">Link2</a>
let aElement2 = document.createElement("a");
aElement2.href = "a2link.html";
aElement2.innerHTML = "Link2";
document.body.appendChild(aElement2);

The a1link.html and a2link.html are almost the same.

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>A1 Link</title>

    <style>
        a {
            padding: 10px;
            border: 1px solid black;
            text-decoration: none;
            color: white;
            background-color: #222222;
            margin: 2px;
        }

        .active {
            background-color: red;
        }
    </style>
</head>
<body>
    <h1>A1 Link</h1>
    <script src="./scripts/index.js"></script>
</body>
</html>

I was trying to make the current anchor a class named active. I have tried with if else and the result was both of them got the active class.

I also tried with addEventListener method with click type parameter but, the result was working until the site refreshes and directs to the other link.

I am trying this in VS code with the file:/// protocol.

What do I need is some JS code to know on what site it is and make the current link of that site a class of active but the others have to remain without the class.

CodePudding user response：

Compare the current location with the URL in the link, and add the active class if they match.

//<a href="a1link,html">Link1</a>
let aElement1 = document.createElement("a");
aElement1.href = "a1link.html";
aElement1.innerHTML = "Link1";
document.body.appendChild(aElement1);
if (window.location.href.match(/a1link\.html/) {
  aElement1.classList.add('active');
}

//<a href="a2link.html">Link2</a>
let aElement2 = document.createElement("a");
aElement2.href = "a2link.html";
aElement2.innerHTML = "Link2";
document.body.appendChild(aElement2);
if (window.location.href.match(/a2link\.html/) {
  aElement2.classList.add('active');
}