Could you explain why the timer needs to be cleared in the return function?

```javascript
type Func = (...params: any[]) => any;

interface Props {
    fn: Func;
    t: number;
}

function debounce({fn, t}: Props): Func {
    let timer: ReturnType<typeof setTimeout>;
    return function(...args) {
        clearTimeout(timer);
        timer = setTimeout(() => fn(...args), t);
    }
};
```
system
kya aap bataa sakate hai ki ritern function main timer ko kyon saaf karne kii aavashyaktaa he?

`` `javascript
tip fank = (... param: koi bhi []) => koi bhi;

interfes props {
    fn: func;
    tii: sankhya;
}

fnction debues ({fn, t}: props): func {
    let timer: ritern tip <typond settimeout>;
    ritern function (... args) {
        ClearTimeout (timer);
        timer = settimeout (() => fn (... args), t);
    }
};
`` `
user
ek `debud 'fnction kaa uddeshy kisi die gaye fnction ke nishpaadan main deree karnaa he jab tak ki kuch nirdisht samay samaapt nahin ho jaataa he.fnction kaa ek lambit nishpaadan abhi bhi chaaron ore ho saktaa he yadi yah phir se jaldi se paryaapt rup se viksit ho gaya, jo pehle sthaan par bahes ke uddeshy ko haraa detaa he.

ise rokane ke liye, `ClearTimeout (Timer)` kisi bhi pehle se sthapit timeout ko radd karne ke liye kaha jaataa he.iske bina, ek pehle se nirdhaarit fnction nishpadit ho saktaa he jabaki nayaa timer chal rahaa he.mukhya uddeshy yah sunishchit karnaa he ki ek nirdisht samay bitne ke baad hi fnction ko chalaane kii anumati he.
assistant
<|system|>
</s>
<|user|>
kya aap bataa sakate hai ki ritern function main timer ko kyon saaf karne kii aavashyaktaa he?

`` `javascript
tip fank = (... param: koi bhi []) => koi bhi;

interfes props {
    fn: func;
    tii: sankhya;
}

fnction debues ({fn, t}: props): func {
    let timer: ritern tip <typond settimeout>;
    ritern function (... args) {
        ClearTimeout (timer);
        timer = settimeout (() => fn (... args), t);
    }
};
`` `</s>
<|assistant|>
ek `debud 'fnction kaa uddeshy kisi die gaye fnction ke nishpaadan main deree karnaa he jab tak ki kuch nirdisht samay samaapt nahin ho jaataa he.fnction kaa ek lambit nishpaadan abhi bhi chaaron ore ho saktaa he yadi yah phir se jaldi se paryaapt rup se viksit ho gaya, jo pehle sthaan par bahes ke uddeshy ko haraa detaa he.

ise rokane ke liye, `ClearTimeout (Timer)` kisi bhi pehle se sthapit timeout ko radd karne ke liye kaha jaataa he.iske bina, ek pehle se nirdhaarit fnction nishpadit ho saktaa he jabaki nayaa timer chal rahaa he.mukhya uddeshy yah sunishchit karnaa he ki ek nirdisht samay bitne ke baad hi fnction ko chalaane kii anumati he.</s>
