Our website is made possible by displaying online advertisements to our visitors. Please consider supporting us by disabling your ad blocker.

Generate Images from HTML with Gulp and Puppeteer

Have you ever needed to generate an image from your HTML? Whether it be for design purposes or for marketing purposes with social media, knowing how to get a screenshot of your HTML design without manually taking the screenshot can be a great thing.

A use-case I was interested in was around feature graphics for each of my blog posts. Sure I could open a graphic design tool like Affinity Photo, or use the same feature graphic for every tutorial, but what if I wanted to automatically generate them based on certain criteria?

In this tutorial we’re going to see how to use Puppeteer to take screenshots of our HTML through a headless Gulp task.

Read More

Maps and Location Services with HERE by Example, Released

I’m pleased to announce that a new course has been published, this time on the subject of maps and various location services. This course titled, Maps and Location Services with HERE by Example, focuses on building web applications using JavaScript and products by HERE Technologies.

In this course you’ll see many step by step examples on how to work with interactive maps, geocode and reverse geocode locations, calculate different types of routes, and more.

Read More

TPDP E32: Getting Familiar with TypeScript for Development

I’m happy to announce that E32 of The Polyglot Developer Podcast is now available for download!

This episode features Corbin Crutchley, a friend, regular guest, and owner of the blog, Unicorn Utterances. You might remember Corbin from the episode, Asynchronous JavaScript Development, where we focused on promises, callbacks, and a lot of other asynchronous topics in JavaScript. This time around we’re focusing on TypeScript, which is a super-set to JavaScript, and is becoming an increasingly popular development technology.

Read More

Execute HTTP Requests in JavaScript Applications

When it comes to modern application development, whether that be web, mobile, or other, there is almost always a need interact with remote web services, generally through HTTP. When working with frameworks such as Angular, Vue, and React, there is baked in functionality for making requests, but what about if you’re using vanilla JavaScript or you’d prefer not to use those built in functionalities?

In this tutorial we’re going to explore a few options towards making HTTP requests in JavaScript. Particularly we’re going to focus on the classic XHR request, using a modern JavaScript Fetch, as well as using a third-party package called Axios.

Read More

Getting Started with Visual Testing

There are tons of tools out there that help you make sure your app is functioning correctly. But how do test software from a purely visual standpoint?

Chances are you’re writing functional tests to check visual elements, or manually checking your UI whenever you push a change. If you are doing either of those things, then you know that they’re incredibly time-consuming and bugs still end up slipping through the cracks.

That’s where visual testing comes in.

Read More

Getting Started with Vue.js Navigation Guards to Restrict Access to Routes

You might remember that I had written a tutorial titled, Simple User Login in a Vue.js Web Application, which demonstrated how to navigate between routes and check a variable to determine if a user should in fact be allowed to be on a particular route. This previous tutorial focused on applying logic after the user had already completed the navigation process, rather than during or prior. While this is a good introduction to becoming familiar with the Vue.js router, it isn’t a realistic approach to handling user login and route restrictions.

The recommended approach is to use navigation guards, sometimes referred to as route guards.

In this tutorial, we’re going to see how to use Vuex with Vue.js navigation guards to protect certain pages within the application from unauthorized access.

Read More

Chaining JavaScript Promises While Sharing Parent Data

Typically when I’m working with RESTful APIs, the routes or endpoints return what I need, plus more, which would be too much data. However, recently I ended up working with an API where the responses were rather trim, resulting in the need to use many HTTP requests to various endpoints, rather than getting everything in a single request. To take it a step further, some of those HTTP requests depended on data from other requests creating a mess of asynchronous operations in JavaScript.

After consulting with my pal, Corbin Crutchley, we came up with a solution to what I needed, without creating chaos in my code. Remember, Corbin is a JavaScript professional, as demonstrated on the podcast we recorded together titled, Asynchronous JavaScript Development.

In this tutorial we’re going to see how to chain JavaScript promises, but also use data from parent links in the promise chain with child links in the same promise chain.

Read More

Search

Follow Us

The Polyglot Developer

Subscribe

Subscribe to the newsletter for monthly tips and tricks on subjects such as mobile, web, and game development.

The Polyglot Developer

Support This Site