css:first-of-type

1.
```html
.info:first-of-type {
    color: red;
}

<div>a</div> // not red
<div class="info">b</div> // not red
<div class="info">c</div> // not red
```


2.
```html
.info:first-of-type {
    color: red;
}

<div>a</div> // not red
<div class="info">b</div> // red
<span class="info">c</span> // red
```