How to get Dev Comments from an article Url
===========================================

I want to incorporate some of the wonderful comments, \U0001F495, \U0001F984, and \U0001F516's that I have been getting on dev.to on my website. I have...

Date: May 20, 2020

I want to incorporate some of the wonderful comments, \U0001F495, \U0001F984,
and \U0001F516's that I have been getting on dev.to on my website. I have
dabbled once or twice with no avail this time I am taking notes on my journey,
so follow along and let's get there together. By the end of this post, I will
have a way to get comments from posts on the client-side thanks to the
wonderfully open dev.to API.

I want to incorporate some of the wonderful comments, 💕, 🦄, and 🔖's that I have been getting on **dev.to** on my website. I have dabbled once or twice with no avail this time I am taking notes on my journey, so follow along and let's get there together. By the end of this post, I will have a way to get comments from posts on the client-side thanks to the wonderfully open dev.to API.

## The API

dev.to has an open API that allows us to easily get comments as HTML. They have their API hosted at [https://docs.forem.com/api/#tag/comments](https://docs.forem.com/api/#tag/comments), let's take a look at it.

![](https://images.waylonwalker.com/dev-to-api-comments.png)

Here we can see that going to [https://dev.to/api/comments?a_id=270180](https://dev.to/api/comments?a_id=270180) returns us some json, that contains an array of comments.

``` json
[
 {body_html: '',
 user: {},
 children: []

 },

 ]
```

## What the heck is that a_id

That is an `article_id`. Though a bit of searching I found that it occurs in at least four places on every page as a data attribute. Using chrome dev tools I found a good place to "query" it from.

![](https://images.waylonwalker.com/dev-to-article-id.png)

With this knowledge, we can fetch the contents of an article and pull the `articleId` from it.

``` javascript
 async function getDevToAId(url) {
 // Gets the articleId of a dev.to article
 const root = 'https://dev.to/'
 if (!url.includes(root)) {
 url = root + url
 }
 let domparser = new DOMParser()
 const html = await fetch(url).then(r => r.text())
 const doc = domparser.parseFromString(html, 'text/html')
 const articleId = doc.querySelector('#article-body').dataset.articleId
 return articleId
 }
```

**note** I do check to see if a full URL or slug was given, if it was just the slug I tack on `https://dev.to/` before fetching.

## Now the comments

The main event is here, what you all have waited for, and it's by far the easiest part.

``` javascript
 async function getDevToComments(url) {
 const articleId = await getDevToAId(url)
 const response = await fetch(`https://dev.to/api/comments?a_id=${articleId}`)
 const comments = await response.json()
 return comments
 }
```

The hardest part of this was figuring out what the `a_id` was and how I was going to get it from some more commonly known information about my articles, the URL, or the slug

## Try it out

**F12** pop open your console right in dev tools of this post and try it out.

![](https://images.waylonwalker.com/dev-to-comments-in-devtools.png)