Border color bleeding bug when border radius is set.

[joonhocho]

As you can see in the picture, border colors are bleeding when borderRadius is set.
It only happens when I use corner border radius such as borderBottomLeftRadius, borderBottomRightRadius.

Here's style for the node:

    borderWidth: StyleSheet.hairlineWidth,
    borderRightWidth: StyleSheet.hairlineWidth,
    borderBottomWidth: 2 * StyleSheet.hairlineWidth,
    borderColor: colors.itemBorder,
    borderRightColor: '#bbbcbd',
    borderBottomColor: '#bbbcbd',
    borderBottomLeftRadius: 4,
    borderBottomRightRadius: 4,
    overflow: 'hidden',

I've tried with different colors and it still happens.

Tested both on iOS simulator and real device iPhone 6 Plus. Same bug.
Haven't tested on Android.

[thomasobrien99]

+1 to this issue, screenshot from iPhone 6. Style for node is:
scaleLevels: {
backgroundColor: colors.deepSkyBlue1,
borderColor: colors.deepSkyBlue1,
borderRadius: dimensions.borderRadius, // 4
borderWidth: dimensions.borderWidth, // 1
flexDirection: 'row'
},
scaleLevel: {
alignItems: 'center',
borderColor: colors.deepSkyBlue1,
borderLeftWidth: dimensions.borderWidth // 1,
flex: 1,
height: dimensions.scaleLevelHeight,
justifyContent: 'center'
},
scaleLevelFirst: {
borderBottomLeftRadius: 3,
borderLeftWidth: 0,
borderTopLeftRadius: 3
},
scaleLevelLast: {
borderBottomRightRadius: 3,
borderTopRightRadius: 3
}

[thomasobrien99]

Doesn't seem to affect smaller devices

[jevakallio]

There was an issue #6082 that was closed by @lacker for lack of reproducible example.

Here's a minimal repro on RNPlay: https://rnplay.org/apps/XiWz1g - It appears this issue happens when you provide border radius to some corners, but not all. Affects iOS only.

[mileung]

Same issue. Any janky code workarounds for this issue yet?

Edit: only happens on physical device (iPhone 6 for me, but probably others as well); not on simulator though.

[code-by]

Same problem for Android. borderRadius / borderColor not works together

[bedemiralp]

This problem is also reported under #11897

[hramos]

Hi there! This issue is being closed because it has been inactive for a while. Maybe the issue has been fixed in a recent release, or perhaps it is not affecting a lot of people. Either way, we're automatically closing issues after a period of inactivity. Please do not take it personally!

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[alenia]

@mileung the janky workaround is to not put a border on the edge opposite the radius

A   _____________ B
  |              | 
  |              | 
  |_____________/ 
D                 C

for a quadrilateral ABCD if corner C has a border radius, then edge AD should not have a border (considering putting a border on its neighbor instead)
I.E. if borderTopRightRadius = 4, then if the bottom right corner has an artifact borderBottom should be 0 (or the borderBottomRightRadius should be defined)