Oops,
On 2021/03/10 17:11, Masayuki Nakano wrote:
Example 1:
```
addEventListener("wheel", event => {
let amount = event.deltaY;
if (isFirefox) {
amount *= 16;
}
scroll(amount);
event.preventDefault();
});
```
Example 2:
```
addEventListener("wheel", event => {
let amount = event.deltaY;
if (isFirefox && navigator.platform.includes("Mac")) {
amount *= 16;
}
scroll(amount);
event.preventDefault();
});
```
These cases are what they will be broken with current hack.
Example 3:
```
addEventListener("wheel", event => {
const amount =
event.deltaY > 0
? Math.min(event.deltaY, 16)
: Math.max(event.deltaY, -16);
scroll(amount);
event.preventDefault();
});
```
And this must be better, but may keep broken if user users
high-resolution wheel on Windows (and maybe on Linux?).
So, in most broken web apps, current hack must work as expected because
`deltaMode` is not referred.
So, the case which will be fixed by the hack is:
```
addEventListener("wheel", event => {
scroll(event.deltaY);
event.preventDefault();
});
```
--
Masayuki Nakano <masay...@d-toybox.com>
Working on DOM, Events, editor and IME handling for Gecko
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