added blog post

Author: ozziest

docs/BlogIndex.vue

@@ -1,5 +1,10 @@
 <script setup lang="ts">
 const posts = [
+  {
+    time: "13 July, 2025",
+    title: "How to Validate Nested Objects in JavaScript with Robust Validator",
+    url: "/blog/2025-07-12-nested-object-validation",
+  },
   {
     time: "13 July, 2025",
     title: "What’s New in Robust Validator v3",

docs/blog/2025-07-12-nested-object-validation.md

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+---
+sidebar: false
+editLink: true
+outline: false
+prev: false
+next: false
+description: Learn how to validate nested objects in JavaScript using Robust Validator. A simple and practical guide for forms and API data.
+---
+
+# How to Validate Nested Objects in JavaScript with Robust Validator
+
+## Intro
+
+When you're working with forms or APIs in JavaScript, you often deal with data that's nested. For example, a user profile might have contact info inside it, and each field needs to be validated.
+
+If you've ever tried to manually check `user.contact.email` or `settings.preferences.notifications`, you know how messy it can get.
+
+In this post, you'll learn how to validate nested objects easily using Robust Validator, a simple and powerful validation library inspired by Laravel.
+
+## Why Nested Validation Matters
+
+Most real-world apps deal with nested data. Things like:
+
+- User profiles
+- Signup forms
+- JSON payloads for APIs
+
+If you skip validation or only check top-level fields, bugs and bad data will sneak in. That leads to broken features, support tickets, and angry users. Not fun.
+
+## Step 1: Install Robust Validator
+
+First, install the package:
+
+```bash
+npm install --save robust-validator
+```
+
+Then import the validator like this:
+
+```ts
+import { validate } from "robust-validator";
+```
+
+## Step 2: Example Data
+
+Here's a sample data object you might get from a form or API:
+
+```ts
+const data = {
+  user: {
+    name: "Alice",
+    contact: {
+      email: "alice@example.com",
+      phone: "",
+    },
+  },
+};
+```
+
+Now let’s say we want to check:
+
+- `user.name` is required and should be at least 3 characters
+- `user.contact.email` is required and should be a valid email
+- `user.contact.phone` is required
+
+## Step 3: Write the Schema
+
+Robust Validator supports dot notation for nested fields.
+
+### Option 1: String-based rules
+
+```ts
+const schema = {
+  "user.name": "required|min:3",
+  "user.contact.email": "required|email",
+  "user.contact.phone": "required",
+};
+```
+
+### Option 2: Function-based rules
+
+```ts
+import { required, min, email } from "robust-validator";
+
+const schema = {
+  "user.name": [required(), min(3)],
+  "user.contact.email": [required(), email()],
+  "user.contact.phone": [required()],
+};
+```
+
+Both ways work the same. Pick the one you like better.
+
+## Step 4: Run the Validation
+
+Here’s how you validate the data:
+
+```ts
+const result = validate(data, schema);
+
+if (!result.passes()) {
+  console.log(result.errors());
+}
+```
+
+## Example Output
+
+If `user.contact.phone` is empty, you’ll get this:
+
+```json
+{
+  "isValid": false,
+  "isInvalid": true,
+  "fields": {
+    "user.name": true,
+    "user.contact.email": true,
+    "user.contact.phone": false
+  },
+  "errors": {
+    "user.contact.phone": [
+      { "rule": "required", "message": "The field is required." }
+    ]
+  }
+}
+```
+
+Now you can show this message to the user or send it back in an API response.
+
+## When to Use This
+
+Use this approach anytime you’re validating:
+
+- Form inputs with nested data
+- API request bodies
+- Config or settings objects
+
+Basically, anytime your object isn’t flat.
+
+## Wrap-Up
+
+Nested object validation doesn’t have to be complicated. With [Robust Validator](https://validator.axe-api.com), you can write clear, simple rules using dot notation. It handles the hard parts so you can focus on building your app.
+
+Give it a try and make your validation cleaner and more reliable.
+
+## Related Links
+
+- [Getting Started](https://validator.axe-api.com/getting-started)
+
+- [All Validation Rules](https://validator.axe-api.com/rules)
+
+- [Customization](https://validator.axe-api.com/customization)