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# Make sure code that relies on things happening in asynchronous code gets called in a callback or event handler, not on the next line. For example, if you call navigator.pointer.lock(), you can't check navigator.pointer.islocked() on the next line, you need to use the successCallback/errorCallback. Same for focus or blur calls and events. Actions that trigger something happening in the future often need a callback or event handler.
# Prefer <code>i++;</code> to <code>i+=1;</code>
One or more tests have to deal with switching the lock between multiple elements, and the [[Changes to Fullscreen Unlock|spec is changing]] on that front.
====Test Reviews====
