You can use the code below to check whether the browser can make connections to the current site: await isOnline...
It might sometimes be useful to check whether your Rails application accesses the file system unnecessarily, for example if your...
Testing file download links in an end-to-end test can be painful, especially with Selenium. The attached download_helpers.rb provides...
tl;dr With ES2021 you now can use str.replaceAll(), Promise.any(), logical assignment operators, numeric separators and WeakRef on all major...
In Chrome DevTools you can use getEventListeners(object) to get a list of registered event listeners on the specified object...
If you're deploying code for your lambda function via terraform, this code is usually zipped and uploaded to Amazon...
tl;dr: Use the URLSearchParams API to make your live easier if you want to get or manipulate query parameters...
Sometimes you will need an input field which wraps content and grows in height as soon as content gets longer...
Redis.current will be removed without replacement in redis-rb 5.0. Version 4.6.0 adds deprecation warnings for Redis.current and Redis.current=: `Redis.current...
While we are used to run our JavaScript tests on a test page within our Browser, it's also possible...
To ensure a consistent code style for JavaScript code, we use ESLint. The workflow is similar to integrating rubocop...
This are the steps I needed to do to add esbuild to an application that used the vanilla rails asset...
AWS ist der meist genutzte Cloud Provider. Bei AWS gibt es extrem viele Themengebiete und es ist nicht möglich sich...
When Capybara locates elements in the DOM, by default it allows only accessing visible elements -- when you are using a...
Jasmine is a great tool to unit test your JavaScript components without writing an expensive end-to-end test for...
Resources RubyGuides: Mastering Ruby Regular Expressions Using regular expressions in JavaScript Testing regular expressions visually Regular Expressions: Quantifier modes...
JavaScript code can access and manipulate the browser's DOM tree. Using JavaScript we can add interactive behavior to our...
One really simple way to check whether JavaScript Sentry integration was successful (raven-js or @sentry/browser), is to create an...
Use option:checked to find the currently selected option: select.querySelector('option:checked') Yes, :checked, not :selected. This is the same...
Jasmine has spyOnProperty(), but it only works if the property is implemented using getter and setter functions. This is a...
In my case [...] the catalog is an XML that contains all kinds of possible products, categories and vendors and it...
TL;DR When using Cache-Control on a Rails application, make sure the Vary: Accept header is set.
The Interactive Advertising Bureau (IAB) is a European marketing association which has introduced a standard how advertising can be served...
Similar to the Webpack Bundle Analyzer, Chrome's new Lighthouse feature … … shows a visualisation of your JavaScript bundles. It's...