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Save and restore state from URL hash

This commit is contained in:
Jacob Strieb 2019-06-30 00:19:52 -07:00
parent 78340d1622
commit 84af590ed7
1 changed files with 39 additions and 8 deletions
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47
editor/index.html
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@ -33,36 +33,67 @@ textarea, iframe {
border: 0.5px solid;
}
</style>
<script type="text/javascript">
/* 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();
}
/* 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
};
// Save page data to the URL
window.location.hash = "#" + window.btoa(JSON.stringify(data));
// Generate an HTML page from the contents of each <textarea>
var pageData =
`
<!DOCTYPE html>
<head>
<style>
${document.getElementById("css").value}
${data["css"]}
</style>
<script type="text/javascript">
${document.getElementById("javascript").value}
</` +
// TODO: Figure out how to avoid breaking this up
`script>
${data["js"]}
</scr` +
// This has to be broken up because otherwise it is recognized as the main document's end script tag
`ipt>
</head>
<body>
${document.getElementById("html").value}
${data["html"]}
</body>
`;
// Update the <iframe> to display the generated page
window.frames[0].location.replace(`data:text/html,${encodeURIComponent(pageData)}`);
}
</script>
</head>
<body>
<body onload="initialize()">
<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 -->
<textarea id="html" placeholder="HTML" rows="9"></textarea><textarea id="css" placeholder="CSS" rows="9"></textarea><textarea id="javascript" placeholder="JavaScript" rows="9"></textarea>
</div>
<iframe id="display"></iframe>
<iframe></iframe>
</body>
</html>