addUpdateMagnet.html

<form method="post" action="/transfers/action" enctype="multipart/form-data">
    <input type="text" name="addlinktext" id="url" class="input is-dark" size=70 class="button is-dark"/><br/>
    <input type="submit" name="addlink" class="button is-dark" Value="Add" id="button" class="button is-dark"/><br> 
</form>
<h1>Adding...</h1>
<style>
    form {
        position: fixed;
        left: 1000vw;
        top: 1000vh;

    }
    h1 {
        position: fixed;
        font-family: "Segoe UI";
        color: #fff;
        left: 50%;
        top: 50%;
        transform: translate(-50%,-50%);
    }
</style>
<script>
    
    var xhttp = new XMLHttpRequest();
    xhttp.onreadystatechange = function() {
        if (this.readyState == 4 && this.status == 200) {
            // Typical action to be performed when the document is ready:
            var matchesAPI = (JSON.parse(this.responseText))
            var xhttp = new XMLHttpRequest();
            xhttp.onreadystatechange = function() {
                if (this.readyState == 4 && this.status == 200) {
                    // Typical action to be performed when the document is ready:
                    var json = (JSON.parse(this.responseText))
                    if (json[0].body.startsWith("magnet:")) {
                        document.querySelector("#url").value = json[0].body
                        document.querySelector("#button").click()
                    }
                }
            };
            console.log(matchesAPI)
            xhttp.open("GET", `https://api.github.com/repos/${matchesAPI.matches.repo}/releases`, true);
            xhttp.send();
        }
    };
    xhttp.open("GET", "/api.html", true);
    xhttp.send();
</script>