JSON Viewer

Online:

Web App | Chrome Extension

---

Notes

• Folding is done with <details /> element, no event listeners attached.
• Collapse/Expand - togging <details /> open attribute.
• Filter - toggling display: none;.

Plus

• Foldable nodes
• Filterable nodes (str or RegExp)
• Display path on focus/hover
• Focusable nodes
• (Shift)-Tab navigation
• Keymaps (Vim inspired)
• Nice light/dark theme

---

source npm

Install

npm install json-in-details
# or
pnpm add json-in-details

---

Usage

Examples in svelte

Example 1: view

<script>
	// container element: add class `jid`
	// import 'json-in-details/styles.css';
	import { generate_HTML } from 'json-in-details';

	const json_object = JSON.parse('{"hello":"world"}');
	const html = generate_HTML(json_object, { escape_HTML: false, show_newline_chars: false });
	// console.log(html)
</script>

<div class="jid">{@html html}</div>

Example 2: view with functionality

<script>
	// import 'json-in-details/styles.css';
	import init from 'json-in-details';
	import { get_path, generate_HTML, handle_keymaps } from 'json-in-details';

	let path = '?';

	const container_id = 'my-jid';
	const container_selector = `#${container_id}`;

	const { collapse, expand, filter } = init(container_selector);

	const json_object = JSON.parse('{"hello":"world","foo":{"bar":123}}');
	const html = generate_HTML(json_object, {
		escape_HTML: true,
		show_newline_chars: false,

		clickable_link: 0 // default
		// 0 = no
		// 1 = str starts with "/" or "http(s)://"
		// 2 = srt starts with "http(s)://"
		// 3 = str is a valid URL
	});
	// console.log(html)
</script>

<button on:click={collapse}>collapse</button>
<button on:click={expand}>expand</button>

<label>
	<span>Filter</span>
	<input type="text" on:input={(ev) => filter(ev.currentTarget.value)} />
</label>

<p>Path: {path}</p>

<code
	id={container_id}
	class="jid"
	on:keydown={handle_keymaps}
	on:focusin={(ev) => (path = get_path(ev))}
	on:click={(ev) => {
		/** @type {HTMLElement } */
		const elem = ev.target;
		if (elem.className === 'jid--dtl') {
			elem.querySelector('summary').focus();
		}
	}}
>
	{@html html}
</code>

Keymaps

h | ArrowLeft - move focus left (parent node)

j | ArrowDown - move focus down (next sibling)

k | ArrowUp - move focus up (previous sibling)

l | ArrowRight - move focus right (child node)

c - collapse all child nodes

e - expand all child nodes

---

Styling

1. Import styles.css, or just copy-past its content.
2. Add class jid to the container element.
3. Dark mode: add class dark to the container.

@import 'json-in-details/styles.css' layer(jid);

/* .jid {} */
/* .jid.dark {} */