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fix(ios): expose keyboard animation params as CSS custom properties #56

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fix(ios): expose keyboard animation params as CSS custom properties #56

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fix(ios): expose keyboard animation params as CSS custom properties
real-alexei Mar 17, 2026
d857134
Merge branch 'main' into fix/ios-keyboard-css-variables
real-alexei Mar 18, 2026
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32 changes: 29 additions & 3 deletions ios/Sources/KeyboardPlugin/Keyboard.m
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Original file line number Diff line number Diff line change
Expand Up @@ -142,8 +142,34 @@ - (void)onKeyboardWillShow:(NSNotification *)notification
}
}

double duration = [[notification.userInfo valueForKey:UIKeyboardAnimationDurationUserInfoKey] doubleValue]+0.2;
[self setKeyboardHeight:height delay:duration];
// Extract animation curve and convert to CSS timing function string
NSInteger animationCurve = [[notification.userInfo valueForKey:UIKeyboardAnimationCurveUserInfoKey] integerValue];
NSString *curveString;
switch (animationCurve) {
case UIViewAnimationCurveEaseInOut:
curveString = @"ease-in-out";
break;
case UIViewAnimationCurveEaseIn:
curveString = @"ease-in";
break;
case UIViewAnimationCurveEaseOut:
curveString = @"ease-out";
break;
case UIViewAnimationCurveLinear:
curveString = @"linear";
break;
default:
curveString = @"ease-in-out";
break;
}

// Set CSS variables on body element
double duration = [[notification.userInfo valueForKey:UIKeyboardAnimationDurationUserInfoKey] doubleValue];
if (duration > 0) {
[self.bridge evalWithJs: [NSString stringWithFormat:@"(function() { document.body.style.setProperty('--keyboard-animation-duration', '%fs'); document.body.style.setProperty('--keyboard-animation-curve', '%@'); })()", duration, curveString]];
}

[self setKeyboardHeight:height delay:0];
[self resetScrollView];

NSString * data = [NSString stringWithFormat:@"{ 'keyboardHeight': %d }", (int)height];
Expand Down Expand Up @@ -180,6 +206,7 @@ - (void)setKeyboardHeight:(int)height delay:(NSTimeInterval)delay
return;
}

[self.bridge evalWithJs: [NSString stringWithFormat:@"(function() { document.body.style.setProperty('--keyboard-height', '%dpx'); })()", height]];
self.paddingBottom = height;

__weak KeyboardPlugin* weakSelf = self;
Expand Down Expand Up @@ -403,4 +430,3 @@ - (void)dealloc

@end
#pragma clang diagnostic pop