It’s pretty typical to use console.log to debug problems in a UI. That is if you want to travel through time (and not space). However, if you log an object or array, this can quickly lead to memory leaks, especially in React apps where components can potentially re-render many times.
When the object or array is logged into the developer tools, the Javascript engine garbage collector cannot clean up the values being logged. This really took me for a wild ride until I realized what was happening.