66 lines
2.0 KiB
HTML
66 lines
2.0 KiB
HTML
<!DOCTYPE html>
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<html lang="en">
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<head>
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<meta charset="utf-8">
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<title>Websockets echo test</title>
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<link rel="stylesheet" href="/css/default.css">
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</head>
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<body>
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<div class="content">
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<h1 class="content-title">Websockets echo test</h1>
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<div class="content-body">
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<textarea id="wfc-output"
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disabled></textarea>
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<input autofocus id="wfc-input"></input>
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</div>
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</div>
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<script>
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let ielt = document.getElementById('wfc-input');
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let oelt = document.getElementById('wfc-output');
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let ws = new WebSocket("/ws/echo");
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// when user hits any key while typing in ielt
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function on_input_key(evt) {
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if (evt.key === 'Enter') {
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// don't do default thing
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evt.preventDefault();
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// grab contents
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let contents = ielt.value;
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let trimmed = contents.trim();
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// if contents are nonempty
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let nonempty_contents = trimmed.length > 0;
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if (nonempty_contents) {
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console.log('message to server:', contents.trim());
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// query backend for result
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ws.send(contents.trim());
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// clear input
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ielt.value = '';
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// add to output
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oelt.value += '> ';
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oelt.value += trimmed;
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oelt.value += '\n';
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}
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}
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}
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function main() {
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ielt.addEventListener('keydown', on_input_key);
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ws.onmessage =
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function (msg_evt) {
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console.log('message from server:', msg_evt);
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let msg_str = msg_evt.data;
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oelt.value += '< ';
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oelt.value += msg_str;
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oelt.value += '\n';
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};
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}
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main();
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</script>
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</body>
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</html>
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