# Separator

A thin divider line. Renders as a horizontal `<hr>` or a vertical bar depending on orientation.

---

## HTML structure

**Horizontal:**
```
hr.border-t.border-border.my-4.{extraClasses}
```

**Vertical:**
```
span.inline-block.border-l.border-border.mx-2.h-4.{extraClasses}
```

---

## CSS mechanics

| Class | Effect |
|---|---|
| `border-t border-border` | Top border in the theme's border color (horizontal) |
| `border-l border-border` | Left border in the theme's border color (vertical) |
| `my-4` | Default vertical margin for horizontal separators |
| `mx-2` | Default horizontal margin for vertical separators |
| `h-4` | 16px height for vertical separators |

---

## Constructor signature

```csharp
public Separator(
    string orientation  = "horizontal",
    string extraClasses = "")
```

| Parameter | Description |
|---|---|
| `orientation` | `"horizontal"` (default) or `"vertical"` |
| `extraClasses` | Additional Tailwind classes on the element |

---

## Usage examples

### Horizontal divider

```csharp
new Separator()
```

### Vertical divider in a flex toolbar

```html
<div class="flex items-center gap-2">
  <button>Bold</button>
  $$VertSep$$
  <button>Italic</button>
  $$VertSep$$
  <button>Underline</button>
</div>
```

```csharp
var VertSep = new Separator(orientation: "vertical");
```

### Custom margin

```csharp
new Separator(extraClasses: "my-8")       // extra vertical space
new Separator(extraClasses: "my-0 mt-2")  // override default margin
```

---

## Tips and tricks

- The horizontal `Separator` is an `<hr>` element — it carries semantic meaning as a thematic break. Use it between content sections.
- The vertical `Separator` is an inline `<span>` — use it inside `flex` rows (toolbars, breadcrumb rows, stat rows, etc.).
- Override margins using `extraClasses` when the default `my-4` / `mx-2` doesn't fit the surrounding layout.
- Override margins using `extraClasses` when the default `my-4` / `mx-2` doesn't fit the surrounding layout.

---

## Complete page example

**`Templates/AboutPage.htmx`**
```html
<div class="max-w-2xl mx-auto py-10">
  <h1 class="text-3xl font-bold mb-2">About BeepBoop</h1>
  <p class="text-muted-foreground mb-4">A fast AOT-safe HTMX framework for .NET 10.</p>
  $$SectionSep1$$
  <h2 class="text-xl font-semibold mb-2">Mission</h2>
  <p class="text-sm mb-4">$$MissionText$$</p>
  $$SectionSep2$$
  <h2 class="text-xl font-semibold mb-2">Team</h2>
  <div class="flex items-center gap-2 text-sm">
    <span>Alice</span>
    $$InlineSep$$
    <span>Bob</span>
    $$InlineSep$$
    <span>Carol</span>
  </div>
</div>
```

**`Templates/AboutPage.htmx.cs`**
```csharp
namespace Htmx.ApiDemo.Templates;

public sealed class AboutPage : AboutPageBase
{
    private readonly IHtmxComponent _sep1;
    private readonly IHtmxComponent _sep2;
    private readonly IHtmxComponent _inline;
    private readonly byte[] _mission;

    public AboutPage()
    {
        _sep1    = new Components.Separator();
        _sep2    = new Components.Separator();
        _inline  = new Components.Separator(orientation: "vertical");
        _mission = "BeepBoop makes building server-rendered HTMX apps as fast and safe as possible.".ToUtf8Bytes();
    }

    protected override void RenderSectionSep1(HtmxRenderContext ctx) => _sep1.Render(ctx.Next());
    protected override void RenderSectionSep2(HtmxRenderContext ctx) => _sep2.Render(ctx.Next());
    protected override void RenderInlineSep(HtmxRenderContext ctx)   => _inline.Render(ctx.Next());
    protected override void RenderMissionText(HtmxRenderContext ctx) => ctx.Writer.WriteUtf8(_mission);
}
```

**GET handler**
```csharp
[Handler]
[MapGet("/about")]
public static partial class GetAboutHandler
{
    public record Query();
    private static Task<IResult> HandleAsync(Query _, HttpContext ctx, CancellationToken ct)
        => ctx.WriteHtmxPage(new AboutPage(), title: "About");
}
```