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Save and restore state from URL hash

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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; border: 0.5px solid;
} }
</style> </style>
<script type="text/javascript"> <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() { 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 = var pageData =
` `
<!DOCTYPE html> <!DOCTYPE html>
<head> <head>
<style> <style>
${document.getElementById("css").value} ${data["css"]}
</style> </style>
<script type="text/javascript"> <script type="text/javascript">
${document.getElementById("javascript").value} ${data["js"]}
</` + </scr` +
// TODO: Figure out how to avoid breaking this up // This has to be broken up because otherwise it is recognized as the main document's end script tag
`script> `ipt>
</head> </head>
<body> <body>
${document.getElementById("html").value} ${data["html"]}
</body> </body>
`; `;
// Update the <iframe> to display the generated page
window.frames[0].location.replace(`data:text/html,${encodeURIComponent(pageData)}`); window.frames[0].location.replace(`data:text/html,${encodeURIComponent(pageData)}`);
} }
</script> </script>
</head> </head>
<body> <body onload="initialize()">
<div id="textboxes" onkeyup="update()"> <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 --> <!-- 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> <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> </div>
<iframe id="display"></iframe> <iframe></iframe>
</body> </body>
</html> </html>