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JavaScript

How to identify and resolve front-end performance bottlenecks

We all want lightning-fast websites and applications, but how do we prioritize our efforts in order to have the biggest impact on performance? We interviewed our own front-end team so we could share some best practices we use every day to improve and maintain the performance of Raygun.

Monitoring Applications Written in Vue.js

Vue.js is a front-end JavaScript framework that you can use to build progressive Single-Page Applications (SPAs). Evan You, an ex-Google employee, created Vue.js in 2014 with an idea of building a lightweight solution that had the best features from Angular and React. Since the day of its inception, Vue.js has been steadily gaining in popularity. Currently, its user base is triple to that of Angular, and a little more than Facebook’s React framework.

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The top web performance killers and how to prevent them

Loading speeds of websites will always be a tricky thing to manage. They depend on anything and everything between your user's choice of device and the server hardware your site runs on. There are many web performance killers that can be removed as you develop your web page. Removing as many of these barriers as possible is critical if you want your website to load smoothly and quickly for the majority of your users. Here are some suggestions for streamlining everything that is within your control to allow for the fastest possible load times for your users.

JavaScript Error Tracking with AppSignal v1.3.0 is Here

We’re happy to announce that the latest npm package for error tracking of your front-end with AppSignal has just been released. For those of you who aren’t really familiar with our error tracking service, we suggest you to take a deeper look into our docs. This was one of the bigger releases, and it includes many improvements and bug fixes. Here’s what we’ve done.

Performance Best Practices: Running and Monitoring Express.js in Production

What is the most important feature an Express.js application can have? Maybe using sockets for real-time chats or GraphQL instead of REST APIs? Come on, tell me. What’s the most amazing, sexy, and hyped feature you have in your Express.js application? Want to guess what mine is? Optimal performance with minimal downtime. If your users can’t use your application, what’s the point of fancy features?

Ride Down Into JavaScript Dependency Hell

Every JavaScript project starts ambitiously, trying not to use too many NPM packages along the way. Even with a lot of effort on our side, packages eventually start piling up. package.json gets more lines over time, and package-lock.json makes pull requests look scary with the number of additions or deletions when dependencies are added. “This is fine” — the team lead says, as other team members nod in agreement. What else are you supposed to do?

A Practical Guide to JavaScript Debugging

Being a UI developer, I’ve learned one thing: It doesn’t matter how carefully you write your code. Suppose you’ve double-checked that you defined and called all functions the right way or followed all the best practices. Even then you’ll see that a tiny variable can sneak behind and create an error. Now, suppose you find out that for some unknown reason a form validation or submit button isn’t working.

JavaScript Tracing: How to Find Slow Code

Finding slow JavaScript code can be a tricky problem to solve. Small code changes can have a big impact on the performance of your code. Fortunately, many different approaches can help you nail down the exact source of the problem. In this post, you’ll learn about three methods that’ll bring you the results you’re seeking. You can trust manual code inspection, but that has its disadvantages.

Top tips to improve JavaScript performance for faster websites

Performance is one of the most important concerns when developing an application. All software developers should monitor and improve performance in every layer of the application. From the database to the server-side language, there are plenty of opportunities for performance issues to arise, and the front end is certainly no exception. So that’s why today we’re talking about JavaScript performance and how to improve it.

How to Fix JavaScript Errors

My computer programming teacher had always told me that 10% of our time is spent developing 90% of our application, and the other 90% of our time finishing the last 10% of our project. Even with a good project plan and a concept that makes logical sense, most of our time will be consumed with fixing errors. Moreover, with JavaScript, our application can run without obvious errors preventing it from being run, so we have to employ several techniques to make sure everything is running smoothly.