jennazee/demorgans.md

## demorgans.md

      
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              demorgans.md
            
          
    I wanted to do not something if the PerformanceTiming object wasn't available, so I started with something like this:
if (!window.performance || !window.performance.timing) {
    return;
}

DeMorgans law says that you can factor out the "not" and then flip the "and" to an "or" or vice versa. So, I was able to switch it to
if (!(window.performance && window.performance.timing)) {
    return;
}