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<!DOCTYPE html>
<html>
<meta name="viewport" content="width=device-width">
<head>
<style>
body {
margin: 0;
padding: 0;
}
h1, a, p {
font-size: 20px;
font-family: system-ui;
}
h1 {
user-select: all;
-webkit-user-select: all;
}
a {
display: inline-block;
text-decoration: none;
}
a:active {
color: blue;
}
textarea {
margin: 1em;
width: calc(100% - 2em);
font-size: 16px;
font-family: monospace;
}
</style>
</head>
<body>
<h1 id="regular">Regular text</h1>
<h1 id="regular-url">Regular text + URL data</h1>
<h1 id="regular-custom">Regular text + custom data</h1>
<h1 id="url">URL data only</h1>
<h1 id="custom">Custom data only</h1>
<img id="image" src="sunset-in-cupertino-200px.png"></img>
<img id="image-text" src="sunset-in-cupertino-200px.png"></img>
<a id="link" href="https://www.apple.com/">Apple Homepage</a>
<a id="link-custom" href="https://www.apple.com/">Apple Homepage</a>
<textarea rows="20" readonly id="text-output"></textarea>
</body>
<script>
window.allData = {};
const textOutput = document.getElementById("text-output");
function collectDataForEvent(event, element)
{
allData = {};
for (let type of event.dataTransfer.types)
allData[type] = event.dataTransfer.getData(type);
textOutput.value = JSON.stringify(allData, null, 4);
}
const regular = document.getElementById("regular");
regular.addEventListener("dragstart", event => collectDataForEvent(event, regular));
const regularURL = document.getElementById("regular-url");
regularURL.addEventListener("dragstart", event => {
event.dataTransfer.setData("text/uri-list", "https://www.google.com");
collectDataForEvent(event, regularURL);
});
const regularCustom = document.getElementById("regular-custom");
regularCustom.addEventListener("dragstart", event => {
event.dataTransfer.setData("text/foo", "Hello world");
collectDataForEvent(event, regularCustom);
});
const url = document.getElementById("url");
url.addEventListener("dragstart", event => {
event.dataTransfer.clearData();
event.dataTransfer.setData("text/uri-list", "https://www.google.com");
collectDataForEvent(event, url);
});
const custom = document.getElementById("custom");
custom.addEventListener("dragstart", event => {
event.dataTransfer.clearData();
event.dataTransfer.setData("text/foo", "Hello world");
collectDataForEvent(event, custom);
});
const image = document.getElementById("image");
image.addEventListener("dragstart", event => collectDataForEvent(event, image));
const imageText = document.getElementById("image-text");
imageText.addEventListener("dragstart", event => {
event.dataTransfer.setData("text/plain", "This is an image of Cupertino.");
collectDataForEvent(event, imageText);
});
const link = document.getElementById("link");
link.addEventListener("dragstart", event => collectDataForEvent(event, link));
const linkCustom = document.getElementById("link-custom");
linkCustom.addEventListener("dragstart", event => {
event.dataTransfer.setData("text/foo", "bar");
collectDataForEvent(event, linkCustom);
});
</script>
</html>
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