Initial commit: Developer Tools MVP with visual editor

- Complete React app with 7 developer tools
- JSON Tool with visual structured editor
- Serialize Tool with visual structured editor
- URL, Base64, CSV/JSON, Beautifier, Diff tools
- Responsive navigation with dropdown menu
- Dark/light mode toggle
- Mobile-responsive design with sticky header
- All tools working with copy/paste functionality

node_modules/es-iterator-helpers/test/tests.js

@@ -0,0 +1,25 @@
+'use strict';
+
+var data = {
+	anchor: { arg: 'bar"baz"', expected: '<a name="bar&quot;baz&quot;">foo</a>' },
+	big: '<big>foo</big>',
+	blink: '<blink>foo</blink>',
+	bold: '<b>foo</b>',
+	fixed: '<tt>foo</tt>',
+	fontcolor: { arg: 'blue"red"green', expected: '<font color="blue&quot;red&quot;green">foo</font>' },
+	fontsize: { arg: '10"large"small', expected: '<font size="10&quot;large&quot;small">foo</font>' },
+	italics: '<i>foo</i>',
+	link: { arg: 'url"http://"', expected: '<a href="url&quot;http://&quot;">foo</a>' },
+	small: '<small>foo</small>',
+	strike: '<strike>foo</strike>',
+	sub: '<sub>foo</sub>',
+	sup: '<sup>foo</sup>'
+};
+
+module.exports = function (method, name, t) {
+	var result = data[name] || {};
+	var expected = typeof result === 'string' ? result : result.expected;
+	var actual = typeof result === 'string' ? method('foo') : method('foo', result.arg);
+
+	t.equal(actual, expected, name + ': got expected result');
+};