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Ich habe Probleme beim Einrichten des Codes. Wenn Sie ein Künstler eingeben und die Taste drücken, es soll alleUncaught TypeError: Kann Eigenschaft 'Klassenname' von Null nicht festlegen Fehler bei Konsole
ihre SongsJavaScript-Datei geben:
/**
* Uses AJAX to query an internet data source for zip codes
* @param {string} zipId The element id that has the zip code
*/
function Music(music) {
// First get the zip code from the HTML textbox
var yourmusic = document.getElementById(music).value;
// Now make a HTTP request
var httpRequest = new XMLHttpRequest();
httpRequest.onreadystatechange = function() {
if (this.readyState === 4) {
// We got a response from the server!
if(this.status === 200) {
// The request was successful!
displayMusic(this.responseText);
} else if (this.status === 404){
// No postal code found
displayMusic('{ "songs" : "none" }');
} else {
console.log("We have a problem: " + this.status);
}
} else {
// Waiting for a response...
}
};
// Notice how the URL is appended with the zip code
var url = " https://api.mixcloud.com/discover/funk/";
httpRequest.open("GET", url, true);
httpRequest.send();
}
/**
* Displays the zip code place given the JSON data
* @param {string} data JSON data representing place for given zip
code
*/
function displayMusic(data){
var music = JSON.parse(data);
if(music.songs === "none") {
document.getElementById("").className = "alert alert-warning";
document.getElementById("").innerHTML = "The songs are" + music;
} else {
document.getElementById("music").className = "alert alert-success";
document.getElementById("music").innerHTML ="there are no songs for this artist"
}
}
HTML-Datei:
<!DOCTYPE html>
<html>
<head>
<title>Songs</title>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css">
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.12.4/jquery.min.js"></script>
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/js/bootstrap.min.js"></script>
<script src="ajaxfunctions.js"></script>
</head>
<body>
<div class="container">
<h2>Songs </h2>
<br/>
<p>Try entering an artist to find their songs</p>
<div>
<div id="musicbox" class="control-group">
<label for="songs">artistr</label>
<input type="text" name="songs" id="songs" placeholder="Type an artist to their songs" />
</div>
</div>
<br />
<div>
<button class='btn btn-success btn-large' onclick="Music('songs')">Find Songs</button>
</div>
<br />
<div>
</div>
</div>
aber es ist ziemlich offensichtlich, dass es nicht ein Element mit der ID „Musik“ – jdmdevdotnet
auch nicht finden, was das ist? 'document.getElementById (" ")' das macht keinen Sinn. – jdmdevdotnet
meine Güte, dauert 1 Minute, um einen Codepen zu machen –