Anyone is capable of having their caps lock key on at any given time without realizing so. Users can easily spot unwanted caps lock when typing in most inputs, but when using a password
input
, the problem isn’t so obvious. That leads to the user’s password being incorrect, which is an annoyance. Ideally developers could let the user know their caps lock key is activated.
To detect if a user has their keyboard’s caps lock turn on, we’ll employ KeyboardEvent
‘s getModifierState
method:
document.querySelector('input[type=password]').addEventListener('keyup', function (keyboardEvent) { const capsLockOn = keyboardEvent.getModifierState('CapsLock'); if (capsLockOn) { // Warn the user that their caps lock is on? } });
I’d never seen getModifierState
used before, so I explored the W3C documentation to discover other useful values:
dictionary EventModifierInit : UIEventInit { boolean ctrlKey = false; boolean shiftKey = false; boolean altKey = false; boolean metaKey = false; boolean modifierAltGraph = false; boolean modifierCapsLock = false; boolean modifierFn = false; boolean modifierFnLock = false; boolean modifierHyper = false; boolean modifierNumLock = false; boolean modifierScrollLock = false; boolean modifierSuper = false; boolean modifierSymbol = false; boolean modifierSymbolLock = false; };
getModifierState
provides a wealth of insight as to the user’s keyboard during key-centric events. I wish I had known about getModifier
earlier in my career!
Being a Dev Dad
I get asked loads of questions every day but I’m always surprised that they’re rarely questions about code or even tech — many of the questions I get are more about non-dev stuff like what my office is like, what software I use, and oftentimes…
New MooTools Plugin: ElementFilter
My new MooTools plugin, ElementFilter, provides a great way for you to allow users to search through the text of any mix of elements. Simply provide a text input box and ElementFilter does the rest of the work. The XHTML I’ve used a list for this example…
Source link
Leave a Reply