A closure doesn't capture the one variable you meant to use; it captures a strong reference to its entire outer lexical environment. Left unmanaged, that environment never leaves memory. The dashboard was a complex data grid, the kind of tool an operations team keeps open all day.
Source: [Dev.to](https://dev.to/abhishekdutta619/the-callback-that-kept-rendering-data-from-twenty-minutes-ago-4460)