Embed JSON editing: validate the captured draft
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<html lang="en-US"><head><meta charset="utf-8"><meta name="viewport" content="width=device-width,initial-scale=1"><title>Embed JSON editing: validate the captured draft</title><style>:root{--paper:#101b27;--ink:#e8f2ff;--accent:#8ec9f4;--surface:#172638;--border:#3c5064;--wash:#20374b;--muted:#b8cadb;--title:system-ui,sans-serif;--radius:7px;--buttonText:#102032}*{box-sizing:border-box}body{margin:0;background:var(--paper);color:var(--ink);font:17px/1.65 system-ui,sans-serif}main{max-width:980px;margin:auto;padding:24px 26px 48px}header{margin-bottom:20px;border-bottom:2px solid var(--accent);padding-bottom:16px}h1{font:700 clamp(28px,5vw,42px)/1.18 var(--title);margin:0 0 10px;letter-spacing:-.025em}h2{font-size:23px;line-height:1.35;margin:24px 0 12px}h3{font-size:19px}p{margin:0 0 16px}.eyebrow{font-size:16px;color:var(--accent);font-weight:700;margin:0 0 5px}.grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:22px}.panel{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:22px;min-width:0;margin-bottom:20px}label{display:block;font-weight:650;margin-bottom:14px}input,textarea,select{display:block;font:inherit;line-height:1.5;width:100%;min-width:0;color:var(--ink);background:var(--surface);border:1px solid var(--accent);border-radius:5px;padding:9px 11px;margin-top:5px}textarea{resize:vertical}button{font:650 16px/1.5 system-ui;min-height:44px;padding:9px 16px;color:var(--buttonText);background:var(--accent);border:1px solid var(--accent);border-radius:5px;cursor:pointer;margin:4px 6px 4px 0}button[aria-pressed=true]{outline:3px solid var(--accent);outline-offset:2px}button:disabled{opacity:.55;cursor:default}:focus-visible{outline:3px solid #b86d10;outline-offset:3px}.result{border-left:4px solid var(--accent);background:var(--wash);padding:15px;margin:16px 0;white-space:pre-line;overflow-wrap:anywhere;font-weight:600}.result:empty{display:none}pre{font:16px/1.55 ui-monospace,Consolas,monospace;background:var(--wash);padding:16px;white-space:pre-wrap;overflow-wrap:anywhere;border:1px solid var(--border);border-radius:5px}code{overflow-wrap:anywhere}.note{font-size:16px;color:var(--muted)}.row{border-bottom:1px solid var(--border);padding:12px 0}.row strong{display:block}table{width:100%;border-collapse:collapse;font-size:16px;table-layout:fixed}th,td{padding:10px 8px;text-align:left;border-bottom:1px solid var(--border);overflow-wrap:anywhere}th{background:var(--wash)}a{color:var(--accent);overflow-wrap:anywhere}footer{border-top:1px solid var(--border);padding-top:16px;font-size:16px;color:var(--muted)}.tiles{display:grid;grid-template-columns:repeat(3,1fr);gap:8px;max-width:330px}.tile{padding:16px;text-align:center;background:var(--wash);border:1px solid var(--border);font-size:22px}svg,canvas{max-width:100%;height:auto}mark{background:#d5f525;color:#202600}ol,ul{padding-left:24px}li{margin-bottom:9px}[hidden]{display:none!important}@media(max-width:640px){main{padding:18px 16px 36px}.grid{grid-template-columns:1fr;gap:0}.panel{padding:17px}header{padding-bottom:12px;margin-bottom:16px}h1{font-size:29px}th,td{padding:8px 5px}h2{margin-top:18px}}</style></head><body><main><header><p class="eyebrow">Original worked example</p><h1>Embed JSON editing: validate the captured draft</h1><p>Fixed local schema: job string, retries integer0–3, enabled boolean; all required, no extra keys.</p></header><section class="panel"><div class="grid"><div><label for="draft">Draft JSON<textarea id="draft" rows="5">{"job":"demo","retries":2,"enabled":false}</textarea></label><button id="commit" type="button">Commit</button><button id="capture" type="button">Capture delayed candidate</button><button id="resolve" type="button">Resolve delayed validation</button><button id="reset" type="button">Reset</button></div><div><h2>Committed JSON</h2><pre id="committed" tabindex="0"></pre></div></div><div class="result" id="result" role="status" aria-live="polite"></div></section><section class="panel"><p>All three keys required. No extras. retries is an integer0–3; enabled must be Boolean false/true, not a string. Every edit retires validation authority for the previous revision.</p></section><footer>The local fixed-schema validator is handwritten; no JSONEditor library, backend or persistence is connected. Changes are temporary. No data is sent or saved.</footer></main><script>
(() => {
'use strict';
const $=selector=>document.querySelector(selector);
const on=(selector,handler)=>$(selector).addEventListener('click',handler);
(function(){const original={job:'demo',retries:2,enabled:false};let revision=0,pending=null;function validate(value){return value===null||Array.isArray(value)||typeof value!=='object'||Object.keys(value).sort().join(',')!=='enabled,job,retries'||typeof value.job!=='string'||!Number.isInteger(value.retries)||value.retries<0||value.retries>3||typeof value.enabled!=='boolean'?'Schema error: exact keys; job string; retries integer 0–3; enabled boolean.':'';}function capture(){try{return {value:JSON.parse($('#draft').value),revision};}catch{$('#result').textContent='JSON syntax error. Committed unchanged.';return null;}}function publish(candidate){if(!candidate)return;if(candidate.revision!==revision){$('#result').textContent='Stale candidate rejected. Committed unchanged.';return;}const error=validate(candidate.value);if(error){$('#result').textContent=error+' Committed unchanged.';return;}$('#committed').textContent=JSON.stringify(candidate.value,null,2);$('#result').textContent='Committed current revision '+revision+' after local validation. No persistence.';}on('#commit',()=>{const candidate=capture();if(candidate){$('#result').textContent='Validation pending for revision '+revision;Promise.resolve().then(()=>publish(candidate));}});on('#capture',()=>{pending=capture();if(pending)$('#result').textContent='Candidate captured at revision '+revision+'. Validation deferred.';});on('#resolve',()=>{if(!pending){$('#result').textContent='No delayed candidate.';return;}publish(pending);pending=null;});on('#reset',()=>{revision++;pending=null;$('#draft').value=JSON.stringify(original);$('#committed').textContent=JSON.stringify(original,null,2);$('#result').textContent='Reset: draft and committed retries 2; enabled false.';});$('#draft').addEventListener('input',()=>{revision++;$('#result').textContent='Draft revision '+revision+' changed; not committed.';});$('#committed').textContent=JSON.stringify(original,null,2);$('#result').textContent='Draft and committed start at retries 2; enabled false.';})();
})();
</script></body></html>