freeCodeCamp/curriculum/challenges/english/14-responsive-web-design-22/learn-html-by-building-a-cat-photo-app/5dc17dc8f86c76b9248c6eb5.md

---
id: 5dc17dc8f86c76b9248c6eb5
title: Step 4
challengeType: 0
dashedName: step-4
---

# --description--

Commenting allows you to leave messages without affecting the browser display. It also allows you to make code inactive. A comment in HTML starts with `<!--`, contains any number of lines of text, and ends with `-->`. For example, the comment `<!-- TODO: Remove h1 -->` contains the text `TODO: Remove h1`.

Add a comment above the `p` element with the text `TODO: Add link to cat photos`.

# --hints--

Your comment should start with `<!--`. You are missing one or more of the characters that define the start of a comment.

```js
assert(code.match(/<!--/));
```

Your comment should end with `-->`.  You are missing one or more of the characters that define the end of a comment.

```js
assert(code.match(/-->/));
```

Your code should not have extra opening/closing comment characters. You have an extra `<!--` or `-->` displaying in the browser.

```js
const noSpaces = code.replace(/\s/g, '');
assert(noSpaces.match(/<!--/g).length < 2 && noSpaces.match(/-->/g).length < 2);
```

Your comment should contain the text `TODO: Add link to cat photos`.

```js
assert(code.match(/<!--\s*todo:\s+add\s+link\s+to\s+cat\s+photos\s*-->/i));
```

Your comment should be above the `p` element. You have them in the wrong order.

```js
assert(
  code
    .replace(/\s/g, '')
    .match(
      /<!--todo:addlinktocatphotos--><p>clickheretoviewmorecatphotos\.?<\/p>/i
    )
);
```

# --seed--

## --seed-contents--

```html
<html>
  <body>
    <h1>CatPhotoApp</h1>
    <h2>Cat Photos</h2>
--fcc-editable-region--
    <p>Click here to view more cat photos.</p>
--fcc-editable-region--
  </body>
</html>
```