Non-blocking Asynchronous JSON.parse Using The Fetch API
Interesting hack to move expensive JSON.parse calls out of the main thread.
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How to grep through the DOM using the Capybara API
When your Cucumber feature needs to browse the page HTML, and you are not sure how to express your query as a clever CSS or XPath expression, there is another way: You can use [all](http://rubydoc.info/github/jnicklas/capybara/master/Capybara/No...
You should be using the Web Animations API
The Web Animations API has great browser support, and you should be using it to animate DOM elements from JavaScript, or to control or wait...
Using the Facebook Graph API
App tokens
For server-to-server requests to the Facebook Graph API you can skip requesting an Oauth token, an instead use the combination of app_id|app_secret as your access token. This token will never expire, and should suffice for ret...
Security issues with hash conditions in Rails 2 and Rails 3
Find conditions for scopes can be given either as an array (:conditions => ['state = ?', 'draft']) or a hash (:conditions => { 'state' => 'draft' }). The later is nicer to read, but has horrible security implications in some versions of Ru...
Caution when using the || operator to set defaults
I often see the use of || to set a default value for a variable that might be nil, null or undefined.
x = x || 'default-value'
This pattern should be avoided in all languages.
While using || works as intended when x is n...
In Chrome 121+ the now supported spec-compliant scrollbar properties override the non-standard `-webkit-scrollbar-*` styles
Up until Chrome 120, scrollbars could only be styled using the various -webkit-scrollbar-* pseudo elements, e.g. to make the scrollbars have no arrows, be rounded, or with additional margin towards their container.
Starting with [version 121](h...
Jasmine: using async/await to write nice asynchronous specs
Jasmine has long standing support for writing asynchronous specs. In days gone by we used the done callback to achieve this, but these days it is possible to write much more readable specs.
Async specs
As a first example, say we want to chec...
Using multiple MySQL versions on the same linux machine using docker
We had a card that described how to install multiple mysql versions using mysql-sandbox. Nowadays with the wide adoption of docker it might be easier to u...
Rails: Using custom config files with the config_for method
You can use the config.x configuration in combination with config_for to configure global settings for your Rails 4.2+ application.
Example
In your `config/application....
Insert an ndash and other special characters using the Compose key on Linux
Although you can access many symbols using the AltGr key you may be missing some, like the en-dash (–) or em-dash (—). You can use a compose key for them instead...