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index.html
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<!DOCTYPE html>
<html>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<!-- Disable zooming: -->
<meta name="viewport" content="width=device-width, initial-scale=1.0, user-scalable=no">
<head>
<title>egui – An immediate mode GUI written in Rust</title>
<style>
html {
/* Remove touch delay: */
touch-action: manipulation;
}
body {
/* Light mode background color for what is not covered by the egui canvas,
or where the egui canvas is translucent. */
background: #909090;
}
@media (prefers-color-scheme: dark) {
body {
/* Dark mode background color for what is not covered by the egui canvas,
or where the egui canvas is translucent. */
background: #404040;
}
}
/* Allow canvas to fill entire web page: */
html,
body {
overflow: hidden;
margin: 0 !important;
padding: 0 !important;
height: 100%;
width: 100%;
}
/* Position canvas in center-top: */
canvas {
margin-right: auto;
margin-left: auto;
display: block;
position: absolute;
top: 0%;
left: 50%;
transform: translate(-50%, 0%);
}
.centered {
margin-right: auto;
margin-left: auto;
display: block;
position: absolute;
top: 50%;
left: 50%;
transform: translate(-50%, -50%);
color: #f0f0f0;
font-size: 24px;
font-family: Ubuntu-Light, Helvetica, sans-serif;
text-align: center;
}
/* ---------------------------------------------- */
/* Loading animation from https://loading.io/css/ */
.lds-dual-ring {
display: inline-block;
width: 24px;
height: 24px;
}
.lds-dual-ring:after {
content: " ";
display: block;
width: 24px;
height: 24px;
margin: 0px;
border-radius: 50%;
border: 3px solid #fff;
border-color: #fff transparent #fff transparent;
animation: lds-dual-ring 1.2s linear infinite;
}
@keyframes lds-dual-ring {
0% {
transform: rotate(0deg);
}
100% {
transform: rotate(360deg);
}
}
</style>
</head>
<body>
<!-- The WASM code will resize the canvas dynamically -->
<canvas id="the_canvas_id"></canvas>
<div class="centered" id="center_text">
<p style="font-size:16px">
Loading…
</p>
<div class="lds-dual-ring"></div>
</div>
<script>
// The `--no-modules`-generated JS from `wasm-bindgen` attempts to use
// `WebAssembly.instantiateStreaming` to instantiate the wasm module,
// but this doesn't work with `file://` urls. This example is frequently
// viewed by simply opening `index.html` in a browser (with a `file://`
// url), so it would fail if we were to call this function!
//
// Work around this for now by deleting the function to ensure that the
// `no_modules.js` script doesn't have access to it. You won't need this
// hack when deploying over HTTP.
delete WebAssembly.instantiateStreaming;
</script>
<!-- this is the JS generated by the `wasm-bindgen` CLI tool -->
<script src="egui_demo_app.js"></script>
<script>
// We'll defer our execution until the wasm is ready to go.
// Here we tell bindgen the path to the wasm file so it can start
// initialization and return to us a promise when it's done.
console.debug("Loading wasm…");
wasm_bindgen("./egui_demo_app_bg.wasm")
.then(on_wasm_loaded)
.catch(on_error);
function on_wasm_loaded() {
console.debug("Wasm loaded. Starting app…");
let handle = new wasm_bindgen.WebHandle();
function check_for_panic() {
if (handle.has_panicked()) {
console.error("The egui app has crashed");
// The demo app already logs the panic message and callstack, but you
// can access them like this if you want to show them in the html:
// console.error(`${handle.panic_message()}`);
// console.error(`${handle.panic_callstack()}`);
document.getElementById("the_canvas_id").remove();
document.getElementById("center_text").innerHTML = `
<p>
The egui app has crashed.
</p>
<p style="font-size:10px" align="left">
${handle.panic_message()}
</p>
<p style="font-size:14px">
See the console for details.
</p>
<p style="font-size:14px">
Reload the page to try again.
</p>`;
} else {
let delay_ms = 1000;
setTimeout(check_for_panic, delay_ms);
}
}
check_for_panic();
handle.start("the_canvas_id").then(on_app_started).catch(on_error);
}
function on_app_started(handle) {
// Call `handle.destroy()` to stop. Uncomment to quick result:
// setTimeout(() => { handle.destroy(); handle.free()) }, 2000)
console.debug("App started.");
document.getElementById("center_text").innerHTML = '';
}
function on_error(error) {
console.error("Failed to start: " + error);
document.getElementById("the_canvas_id").remove();
document.getElementById("center_text").innerHTML = `
<p>
An error occurred during loading:
</p>
<p style="font-family:Courier New">
${error}
</p>
<p style="font-size:14px">
Make sure you use a modern browser with WebGL and WASM enabled.
</p>`;
}
</script>
</body>
</html>
<!-- Powered by egui: https://github.com/emilk/egui/ -->