I hope to explain it in detail
Why canclearTimeout (tc) clear the last setTimeout?
I hope to explain it in detail
Why canclearTimeout (tc) clear the last setTimeout?
because js has no block-level scope, only global scope and function scope. So, the code actually goes like this:
the next four timers are executed after the for loop has been executed four times; but because the tc is defined four times in the for loop, each definition will reassign the previous tc, which is equivalent to defining tc four times, and only the last time is valid, so only the last tc is cleared
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