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urlpages/editor/index.html

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<!DOCTYPE html>
<html>
<head>
<title>Create and edit URL pages</title>
<style>
* {
margin: 0px;
box-sizing: border-box;
vertical-align: top;
}
html, body {
height: 100%;
}
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#textboxes {
height: 40%;
width: 100%;
}
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textarea {
resize: none;
width: 33.3333%;
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height: 100%;
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}
iframe {
width: 100%;
height: 60%;
}
textarea, iframe {
border: 0.5px solid;
}
a, button {
background: black;
color: limegreen;
text-decoration: none;
padding: 2px 5px;
border: none;
}
#buttons {
position: absolute;
bottom: 0;
right: 0;
}
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</style>
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<script type="text/javascript">
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/* Run once when the page is loaded */
function initialize() {
// Get page data from the URL and load it into the boxes
if (window.location.hash) {
var b64 = window.location.hash.slice(1);
var json = window.atob(b64);
var data = JSON.parse(json);
document.getElementById("css").value = data["css"];
document.getElementById("javascript").value = data["js"];
document.getElementById("html").value = data["html"];
}
update();
}
/* Return the HTML string for the page */
function getHTML(data) {
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// Generate an HTML page from the contents of each <textarea>
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var pageData =
`
<!DOCTYPE html>
<head>
<style>
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${data["css"]}
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</style>
<script type="text/javascript">
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${data["js"]}
</scr` +
// This has to be broken up because otherwise it is recognized as the main document's end script tag
`ipt>
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</head>
<body>
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${data["html"]}
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</body>
`;
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return pageData;
}
/* Return a link to view the page */
function getViewLink(pageData) {
return `../#${window.btoa(encodeURIComponent(pageData))}`
}
/* Run each time a key is pressed on a text box */
function update() {
var data = {
"css" : document.getElementById("css").value,
"js" : document.getElementById("javascript").value,
"html" : document.getElementById("html").value
};
var html = getHTML(data);
// Save encoded page data to the URL
window.location.hash = "#" + window.btoa(JSON.stringify(data));
// Update the URL for the "Get Link" button
document.getElementById("getLinkLink").href = getViewLink(html);
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// Update the <iframe> to display the generated page
window.frames[0].location.replace(`data:text/html,${encodeURIComponent(html)}`);
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}
</script>
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</head>
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<body onload="initialize()">
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<div id="textboxes" onkeyup="update()">
<!-- Unfortunately having these <textarea>s on one line is actually necessary to remove a tiny amount of horizontal space between them -->
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<textarea id="html" placeholder="HTML" rows="9"></textarea><textarea id="css" placeholder="CSS" rows="9"></textarea><textarea id="javascript" placeholder="JavaScript" rows="9"></textarea>
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</div>
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<div id="buttons">
<button><a id="getLinkLink" href="" target="_blank">Get Link</a></button>
</div>
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<iframe></iframe>
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</body>
</html>