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Option to remove the thick bottom border from `thead` and top border from `tfoot` in table element · Issue #35342 · twbs/bootstrap · GitHub
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valid/invalid custom select reverts to default border color on focus · Issue #24553 · twbs/bootstrap · GitHub
![Bootstrap on Twitter: "Curious what CSS variables in Bootstrap look like? Check out the updated Button docs page which includes an example of how to build your own custom button variants with Bootstrap on Twitter: "Curious what CSS variables in Bootstrap look like? Check out the updated Button docs page which includes an example of how to build your own custom button variants with](https://pbs.twimg.com/media/FPTdjp6VUAUuW5f.jpg:large)
Bootstrap on Twitter: "Curious what CSS variables in Bootstrap look like? Check out the updated Button docs page which includes an example of how to build your own custom button variants with
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Tabs border color on card header should be match the card border color? · Issue #28837 · twbs/bootstrap · GitHub
![css - (Bootstrap 4) Card borders rendered bad/different when used together with bg-color - Stack Overflow css - (Bootstrap 4) Card borders rendered bad/different when used together with bg-color - Stack Overflow](https://i.stack.imgur.com/w51je.png)
css - (Bootstrap 4) Card borders rendered bad/different when used together with bg-color - Stack Overflow
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