
## Table of Contents

1. [Introduction](#introduction)
2. [Missing i Tag Closing Tag](#missing-i-tag-closing-tag)
3. [The Cascading Effect](#the-cascading-effect)
4. [Conclusion](#conclusion)

## Introduction

I thought I understood most of HTML, but look at the following example. When you write like
this, an unclosed `<i>` tag can cause unexpected behavior.

## Missing i Tag Closing Tag

````


hi

*```


  The code will output to the browser as follows. The
  `i` tag needs a closing tag `*`.


````

hi

_\*\*// tell the embed parent frame the height of the content
if (window.parent && window.parent.parent){
window.parent.parent.postMessage(["resultsFrame", {
height: document.body.getBoundingClientRect().height,
slug: "None"
}], "_")
}\*

```

## The Cascading Effect

How about this HTML?

```

\*```

Yes, it becomes a little crazy — the unclosed i tag applies italic styling to all the parent DOM elements.

```**************// tell the embed parent frame the height of the content
  if (window.parent && window.parent.parent){
    window.parent.parent.postMessage(["resultsFrame", {
      height: document.body.getBoundingClientRect().height,
      slug: "None"
    }], "*")
  }*
```

## Conclusion

Always remember to close your HTML `<i>` tags. An unclosed `<i>` tag will cascade italic styling to all subsequent and parent DOM elements, which can cause unexpected rendering issues in the browser.


A quick note about the importance of closing the HTML i tag and how missing it affects the DOM.

HTML

HTML i Tag Closing Tag