concat-stream VS lrnwebcomponents

This will cover a slightly more complex aspect of a micro frontend (at least on one side of that transaction) which is taking a FormData object to allow for uploading files, then using a npm package called busboy which is used for "parsing incoming HTML form data" as well as concat-stream for file upload via that form data POST.

utils.makeElementFromClass(GitCorner, { source: 'https://github.com/elmsln/lrnwebcomponents', alt: "Our monorepo of all the things you see here", corner: true, size: "large" })

web component source

microservice source

Source for microservice

MD to HTML micro code

source for MFR

backend code for vercel

Code Monorepo - https://github.com/elmsln/lrnwebcomponents/tree/master/ . /api has the endpoints for the microservices and /elements contains source for our web components

Full source

Our url holds the link to google's mapping api and right after the /maps?q= in the link, we place in the latitude and longitude we have already found. Then, all we have left is to place that url into the src of our and the map will display, embedded in our page.

For more info on using the Google Maps Platform check out their developer page.

Externally

To create a link in our page that takes up to Google Maps with our desired location already in the view window is not too different from before. We can create a simple tag and place the link for an external path with our long and lat we've received before.

    See on Google

Enter fullscreen mode Exit fullscreen mode

Here we've created a link that leads to google map's site with our long and lat coordinates and a zoom of 14 (,14z).

Wiring with an Existing Component

Let's say you want to use the data we received to utilize a different web component.

For this example, we'll look at a tag named that will perform a wikipedia search and embed the page found into our site.
Wikipedia-query info: Github npmjs

Set Up

We'll start by wiring the component into our program so we can implement the project. First, adding the package location to our dependencies in package.json.

Then we'll run an npm install on our project to get all the needed assets to run wikipedia-query.

Once the install is finished, we want to add a "bare import" to our program file to be able to access the tag we just installed. A "bare import" is a convention where we let LitElement find what exact file we are looking for rather than specifically declaring one. This is important for improving the maintainability of our code since file locations and structures can change over time.

In this example, our "bare import" will look like this:

import '@lrnwebcomponents/wikipedia-query';

Enter fullscreen mode Exit fullscreen mode

Notice we only specify the general area of what we are importing and not a specific file name.

Utilization

Now that we're all set up, we can do objectively the easiest part. Remember we want to use the tag to display a wiki page of the location we received from our API earlier.

To implement our tag we pass our location into it's search property and let the tag do the rest of the work for us.

//finding wiki based on city and state


//finding wiki based on city


//finding wiki based on state

Enter fullscreen mode Exit fullscreen mode

Wrap It Up

The main point in this post is the effectiveness of the fetch function. We are able to set a call to any API, receive the JSON data, and use that data in any way we want.

Everything I talked about in this post is held in a small project that does more than is explained but is mostly centered around these topics.

Feel free to clone and play with the program on your own to see how it all plays together: Github

FYI: Everything discussed in this post is location in the LocationFromIP.js file in the src folder.