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json-schema-builder.html
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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>JSON Schema Builder</title>
<style>
* {
box-sizing: border-box;
}
body {
font-family: Helvetica, Arial, sans-serif;
margin: 0;
padding: 20px;
background-color: #f5f5f5;
}
h1, h2, h3 {
font-weight: 500;
}
.container {
max-width: 100%;
margin: 0 auto;
background-color: white;
border-radius: 8px;
box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
padding: 20px;
}
.schema-builder {
display: flex;
flex-direction: column;
gap: 20px;
}
.editor-panel {
width: 100%;
padding: 15px;
border: 1px solid #ddd;
border-radius: 4px;
}
.output-panel {
width: 100%;
position: relative;
}
.schema-output {
width: 100%;
height: 300px;
background-color: #f8f8f8;
border: 1px solid #ddd;
border-radius: 4px;
padding: 15px;
font-family: monospace;
overflow-y: auto;
white-space: pre-wrap;
}
.property-list {
margin-top: 20px;
}
.property-item {
border: 1px solid #ddd;
border-radius: 4px;
padding: 15px;
margin-bottom: 15px;
background-color: #f9f9f9;
}
.nested-properties {
margin-left: 20px;
margin-top: 15px;
padding-left: 10px;
border-left: 2px solid #2196F3;
}
.actions {
margin-top: 15px;
display: flex;
gap: 10px;
}
button {
padding: 8px 12px;
background-color: #2196F3;
color: white;
border: none;
border-radius: 4px;
cursor: pointer;
font-size: 14px;
}
button:hover {
background-color: #0b7dda;
}
button.secondary {
background-color: #f1f1f1;
color: #333;
border: 1px solid #ddd;
}
button.secondary:hover {
background-color: #e1e1e1;
}
button.remove {
background-color: #f44336;
}
button.remove:hover {
background-color: #d32f2f;
}
button.copy {
position: absolute;
top: 10px;
right: 10px;
z-index: 10;
}
.form-group {
margin-bottom: 15px;
}
label {
display: block;
margin-bottom: 5px;
font-weight: bold;
}
input, select, textarea {
width: 100%;
padding: 8px;
border: 1px solid #ddd;
border-radius: 4px;
font-size: 16px;
font-family: Helvetica, Arial, sans-serif;
}
.checkbox-group {
display: flex;
align-items: center;
gap: 5px;
}
.checkbox-group input {
width: auto;
}
.alert {
padding: 10px 15px;
background-color: #f8d7da;
color: #721c24;
border: 1px solid #f5c6cb;
border-radius: 4px;
margin-bottom: 15px;
display: none;
}
.success {
background-color: #d4edda;
color: #155724;
border-color: #c3e6cb;
}
@media (min-width: 768px) {
.schema-output {
height: 400px;
}
}
</style>
</head>
<body>
<div class="container">
<h1>JSON Schema Builder</h1>
<p>Build your JSON schema by adding properties and nested objects.</p>
<div id="alert" class="alert"></div>
<div class="schema-builder">
<div class="editor-panel">
<h2>Schema properties</h2>
<div class="form-group">
<label for="schema-title">Schema title</label>
<input type="text" id="schema-title" placeholder="Enter schema title">
</div>
<div class="form-group">
<label for="schema-description">Schema description</label>
<textarea id="schema-description" rows="2" placeholder="Enter schema description"></textarea>
</div>
<div class="property-list" id="property-list">
<!-- Property items will be added here -->
</div>
<button id="add-property">Add property</button>
</div>
<div class="output-panel">
<h2>Schema output</h2>
<button id="copy-button" class="copy">Copy</button>
<div id="schema-output" class="schema-output"></div>
</div>
</div>
</div>
<script type="module">
// Main schema object
const schema = {
type: "object",
properties: {}
};
// DOM elements
const schemaTitle = document.getElementById("schema-title");
const schemaDescription = document.getElementById("schema-description");
const propertyList = document.getElementById("property-list");
const addPropertyButton = document.getElementById("add-property");
const schemaOutput = document.getElementById("schema-output");
const copyButton = document.getElementById("copy-button");
const alertElement = document.getElementById("alert");
// Event listeners
schemaTitle.addEventListener("input", updateSchema);
schemaDescription.addEventListener("input", updateSchema);
addPropertyButton.addEventListener("click", addProperty);
copyButton.addEventListener("click", copySchema);
// Initialize
loadFromHash();
window.addEventListener("hashchange", loadFromHash);
// Add a new property
function addProperty(event, parentElement = propertyList, parentPath = null) {
const propertyItem = document.createElement("div");
propertyItem.className = "property-item";
const propertyId = "prop-" + Date.now() + "-" + Math.floor(Math.random() * 1000);
propertyItem.dataset.id = propertyId;
propertyItem.innerHTML = `
<div class="form-group">
<label for="${propertyId}-name">Property name</label>
<input type="text" id="${propertyId}-name" class="property-name" placeholder="Enter property name">
</div>
<div class="form-group">
<label for="${propertyId}-type">Property type</label>
<select id="${propertyId}-type" class="property-type">
<option value="string">String</option>
<option value="number">Number</option>
<option value="integer">Integer</option>
<option value="boolean">Boolean</option>
<option value="object">Object</option>
<option value="array">Array</option>
</select>
</div>
<div class="form-group">
<label for="${propertyId}-description">Description</label>
<input type="text" id="${propertyId}-description" class="property-description" placeholder="Property description">
</div>
<div class="form-group array-item-type-container" style="display: none;">
<label for="${propertyId}-array-type">Array items type</label>
<select id="${propertyId}-array-type" class="array-item-type">
<option value="string">String</option>
<option value="number">Number</option>
<option value="integer">Integer</option>
<option value="boolean">Boolean</option>
<option value="object">Object</option>
</select>
</div>
<div class="form-group">
<div class="checkbox-group">
<input type="checkbox" id="${propertyId}-required" class="property-required">
<label for="${propertyId}-required">Required</label>
</div>
</div>
<div class="nested-properties" id="${propertyId}-nested" style="display: none;"></div>
<div class="actions">
<button class="add-nested" style="display: none;">Add nested property</button>
<button class="remove">Remove</button>
</div>
`;
parentElement.appendChild(propertyItem);
// Event listeners for the new property
const typeSelect = propertyItem.querySelector(".property-type");
const arrayTypeContainer = propertyItem.querySelector(".array-item-type-container");
const arrayTypeSelect = propertyItem.querySelector(".array-item-type");
const nestedContainer = propertyItem.querySelector(".nested-properties");
const addNestedButton = propertyItem.querySelector(".add-nested");
const removeButton = propertyItem.querySelector(".remove");
const nameInput = propertyItem.querySelector(".property-name");
const descriptionInput = propertyItem.querySelector(".property-description");
const requiredCheckbox = propertyItem.querySelector(".property-required");
// Handle property type change
typeSelect.addEventListener("change", function() {
const isObject = this.value === "object";
const isArray = this.value === "array";
nestedContainer.style.display = isObject ? "block" : "none";
addNestedButton.style.display = isObject ? "inline-block" : "none";
arrayTypeContainer.style.display = isArray ? "block" : "none";
updateSchema();
});
// Handle array item type change
arrayTypeSelect.addEventListener("change", function() {
const isObject = this.value === "object";
if (isObject && typeSelect.value === "array") {
nestedContainer.style.display = "block";
addNestedButton.style.display = "inline-block";
} else {
nestedContainer.style.display = "none";
addNestedButton.style.display = "none";
}
updateSchema();
});
// Add nested property
addNestedButton.addEventListener("click", function(event) {
event.preventDefault();
addProperty(event, nestedContainer, propertyId);
});
// Remove property
removeButton.addEventListener("click", function() {
propertyItem.remove();
updateSchema();
});
// Update schema on input change
nameInput.addEventListener("input", updateSchema);
descriptionInput.addEventListener("input", updateSchema);
requiredCheckbox.addEventListener("change", updateSchema);
updateSchema();
return propertyItem;
}
// Update schema JSON based on form inputs
function updateSchema() {
// Update title and description
if (schemaTitle.value) {
schema.title = schemaTitle.value;
} else {
delete schema.title;
}
if (schemaDescription.value) {
schema.description = schemaDescription.value;
} else {
delete schema.description;
}
// Reset properties and required
schema.properties = {};
schema.required = [];
// Process all property items
processPropertyItems(propertyList.children, schema.properties, schema.required);
// Remove required if empty
if (schema.required.length === 0) {
delete schema.required;
}
// Update the output
schemaOutput.textContent = JSON.stringify(schema, null, 2);
// Update URL hash
updateUrlHash();
}
// Process property items recursively
function processPropertyItems(items, propertiesObj, requiredArr) {
Array.from(items).forEach(item => {
if (!item.classList.contains("property-item")) return;
const nameInput = item.querySelector(".property-name");
const typeSelect = item.querySelector(".property-type");
const descriptionInput = item.querySelector(".property-description");
const requiredCheckbox = item.querySelector(".property-required");
const arrayTypeSelect = item.querySelector(".array-item-type");
const nestedContainer = item.querySelector(".nested-properties");
const name = nameInput.value.trim();
if (!name) return;
const type = typeSelect.value;
// Create property definition
const property = {
type: type
};
// Add description if provided
if (descriptionInput.value.trim()) {
property.description = descriptionInput.value.trim();
}
// Handle arrays
if (type === "array") {
const itemsType = arrayTypeSelect.value;
if (itemsType === "object") {
property.items = {
type: "object",
properties: {}
};
const nestedRequired = [];
processPropertyItems(nestedContainer.children, property.items.properties, nestedRequired);
if (nestedRequired.length > 0) {
property.items.required = nestedRequired;
}
} else {
property.items = { type: itemsType };
}
}
// Handle objects
if (type === "object") {
property.properties = {};
const nestedRequired = [];
processPropertyItems(nestedContainer.children, property.properties, nestedRequired);
if (nestedRequired.length > 0) {
property.required = nestedRequired;
}
}
// Add to properties
propertiesObj[name] = property;
// Add to required array if checked
if (requiredCheckbox.checked) {
requiredArr.push(name);
}
});
}
// Copy schema to clipboard
function copySchema() {
const textarea = document.createElement("textarea");
textarea.value = schemaOutput.textContent;
document.body.appendChild(textarea);
textarea.select();
try {
document.execCommand("copy");
showAlert("Schema copied to clipboard!", true);
} catch (err) {
showAlert("Failed to copy schema", false);
}
document.body.removeChild(textarea);
}
// Show alert message
function showAlert(message, isSuccess = false) {
alertElement.textContent = message;
alertElement.style.display = "block";
if (isSuccess) {
alertElement.classList.add("success");
} else {
alertElement.classList.remove("success");
}
setTimeout(() => {
alertElement.style.display = "none";
}, 3000);
}
// Update URL hash with schema
function updateUrlHash() {
try {
const hashValue = btoa(JSON.stringify(schema));
window.history.replaceState(null, null, "#" + hashValue);
} catch (e) {
console.error("Error updating URL hash:", e);
}
}
// Load schema from URL hash
function loadFromHash() {
if (!window.location.hash) return;
try {
const hash = window.location.hash.substring(1);
const decodedSchema = JSON.parse(atob(hash));
// Reset form
propertyList.innerHTML = "";
// Set title and description
if (decodedSchema.title) {
schemaTitle.value = decodedSchema.title;
} else {
schemaTitle.value = "";
}
if (decodedSchema.description) {
schemaDescription.value = decodedSchema.description;
} else {
schemaDescription.value = "";
}
// Rebuild properties
if (decodedSchema.properties) {
buildPropertiesFromSchema(decodedSchema.properties, propertyList, decodedSchema.required || []);
}
// Update output
schema.title = decodedSchema.title;
schema.description = decodedSchema.description;
schema.properties = decodedSchema.properties || {};
schema.required = decodedSchema.required || [];
schemaOutput.textContent = JSON.stringify(schema, null, 2);
} catch (e) {
console.error("Error loading from hash:", e);
showAlert("Failed to load schema from URL", false);
}
}
// Build properties from loaded schema
function buildPropertiesFromSchema(properties, container, requiredArr) {
for (const propName in properties) {
const property = properties[propName];
const propItem = addProperty(null, container);
// Set basic property fields
propItem.querySelector(".property-name").value = propName;
propItem.querySelector(".property-type").value = property.type;
if (property.description) {
propItem.querySelector(".property-description").value = property.description;
}
if (requiredArr.includes(propName)) {
propItem.querySelector(".property-required").checked = true;
}
// Handle arrays
if (property.type === "array" && property.items) {
const arrayTypeContainer = propItem.querySelector(".array-item-type-container");
const arrayTypeSelect = propItem.querySelector(".array-item-type");
const nestedContainer = propItem.querySelector(".nested-properties");
const addNestedButton = propItem.querySelector(".add-nested");
arrayTypeContainer.style.display = "block";
if (property.items.type) {
arrayTypeSelect.value = property.items.type;
if (property.items.type === "object" && property.items.properties) {
nestedContainer.style.display = "block";
addNestedButton.style.display = "inline-block";
buildPropertiesFromSchema(
property.items.properties,
nestedContainer,
property.items.required || []
);
}
}
}
// Handle objects
if (property.type === "object" && property.properties) {
const nestedContainer = propItem.querySelector(".nested-properties");
const addNestedButton = propItem.querySelector(".add-nested");
nestedContainer.style.display = "block";
addNestedButton.style.display = "inline-block";
buildPropertiesFromSchema(
property.properties,
nestedContainer,
property.required || []
);
}
}
}
</script>
</body>
</html>