2018-08-15 18:21:27 +08:00
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<!DOCTYPE HTML>
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<html>
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<head>
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<title>JSONEditor | Custom validation (asynchronous)</title>
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<link href="../dist/jsoneditor.css" rel="stylesheet" type="text/css">
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<script src="../dist/jsoneditor.js"></script>
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<style type="text/css">
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body {
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width: 600px;
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font: 11pt sans-serif;
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}
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#jsoneditor {
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width: 100%;
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height: 500px;
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}
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</style>
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</head>
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<body>
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<h1>Asynchronous custom validation</h1>
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<p>
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This example demonstrates how to run asynchronous custom validation on a JSON object.
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The names are checked asynchronously and the results "come in" half a second later.
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Known names in this example are 'Joe', 'Harry', 'Megan'. For other names, a validation error will be displayed.
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</p>
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<div id="jsoneditor"></div>
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<script>
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var json = {
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customers: [
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{name: 'Joe'},
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{name: 'Sarah'},
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{name: 'Harry'},
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]
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};
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var options = {
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mode: 'tree',
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2019-07-24 19:30:44 +08:00
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modes: ['code', 'text', 'tree', 'preview'],
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2018-08-15 18:21:27 +08:00
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onValidate: function (json) {
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// in this validation function we fake sending a request to a server
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// to validate the existence of customers
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if (json && Array.isArray(json.customers)) {
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return Promise
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.all(json.customers.map(function (customer, index) {
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return isExistingCustomer(customer && customer.name).then(function (exists) {
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if (!exists) {
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return {
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path: ['customers', index],
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message: 'Customer ' + customer.name + ' doesn\'t exist in our database'
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}
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}
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else {
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return null;
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}
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});
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}))
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.then(function (errors) {
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return errors.filter(function (error) {
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return error != null;
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})
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});
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}
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else {
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return null;
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}
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}
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};
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// create the editor
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var container = document.getElementById('jsoneditor');
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var editor = new JSONEditor(container, options, json);
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editor.expandAll();
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// this function fakes a request (asynchronous) to a server to validate the existence of a customer
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function isExistingCustomer (customerName) {
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return new Promise(function (resolve, reject) {
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setTimeout(function () {
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var customers = ['Joe', 'Harry', 'Megan'];
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var exists = customers.indexOf(customerName) !== -1;
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resolve(exists);
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}, 500);
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})
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}
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</script>
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</body>
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</html>
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