Outdated content
This page is outdated and is no longer applicable to the latest versions of Bootstrap. It’s here purely for historical purposes now and will be removed in our next major release.
Bootstrap currently works around several outstanding browser bugs in major browsers to deliver the best cross-browser experience possible. Some bugs, like those listed below, cannot be solved by us.
We publicly list browser bugs that are impacting us here, in the hopes of expediting the process of fixing them. For information on Bootstrap’s browser compatibility, see our browser compatibility docs.
See also:
- Chromium issue 536263: [meta] Issues affecting Bootstrap
- Mozilla bug 1230801: Fix the issues that affect Bootstrap
- WebKit bug 159753: [meta] Issues affecting Bootstrap
- jQuery’s browser bug workarounds
| Browser(s) | Summary of bug | Upstream issue(s) | Bootstrap issue(s) |
|---|---|---|---|
| Edge | Visual artifacts in scrollable modal dialogs | Edge issue #9011176 | #20755 |
| Edge | Native browser tooltip for title shows on first keyboard focus (in addition to custom tooltip component) |
Edge issue #6793560 | #18692 |
| Edge | Hovered element still remains in :hover state after scrolling away. |
Edge issue #5381673 | #14211 |
| Edge | CSS border-radius sometimes causes lines of bleed-through of the background-color of the parent element. |
Edge issue #3342037 | #16671 |
| Edge | background of <tr> is only applied to first child cell instead of all cells in the row |
Edge issue #5865620 | #18504 |
| Edge | Background color from lower layer bleeds through transparent border in some cases | Edge issue #6274505 | #18228 |
| Edge | Hovering over descendant SVG element fires mouseleave event at ancestor |
Edge issue #7787318 | #19670 |
| Edge | Active position: fixed; <button> flickers when scrolling |
Edge issue #8770398 | #20507 |
| Firefox | .table-bordered with an empty <tbody> is missing borders. |
Mozilla bug #1023761 | #13453 |
| Firefox | If the disabled state of a form control is changed via JavaScript, the normal state doesn’t return after refreshing the page. | Mozilla bug #654072 | #793 |
| Firefox | focus events should not be fired at the document object |
Mozilla bug #1228802 | #18365 |
| Firefox | Wide floated table doesn’t wrap onto new line | Mozilla bug #1277782 | #19839 |
| Firefox | Mouse sometimes not within element for purposes of mouseenter/mouseleave when it’s within SVG elements |
Mozilla bug #577785 | #19670 |
| Firefox | Layout with floated columns breaks when printing | Mozilla bug #1315994 | #21092 |
| Firefox (Windows) | Right border of <select> menu is sometimes missing when screen is set to uncommon resolution |
Mozilla bug #545685 | #15990 |
| Firefox (macOS & Linux) | Badge widget causes bottom border of Tabs widget to unexpectedly not overlap | Mozilla bug #1259972 | #19626 |
| Chrome (macOS) | Clicking above <input type="number"> increment button flashes the decrement button. |
Chromium issue #419108 | #8350, Chromium issue #337668 |
| Chrome | CSS infinite linear animation with alpha transparency leaks memory. | Chromium issue #429375 | #14409 |
| Chrome | table-cell borders not overlapping despite margin-right: -1px |
Chromium issue #749848 | #17438, #14237 |
| Chrome | Don’t make :hover sticky on touch-friendly webpages |
Chromium issue #370155 | #12832 |
| Chrome | position: absolute element that’s wider than its column is incorrectly clipped to column boundary |
Chromium issue #269061 | #20161 |
| Chrome | Significant performance hit for dynamic SVGs with text depending on the number of fonts in font-family. |
Chromium issue #781344 | #24673 |
| Safari | rem units in media queries should be calculated using font-size: initial, not the root element’s font-size |
WebKit bug #156684 | #17403 |
| Safari | Link to container with id and tabindex results in container being ignored by VoiceOver (affects skip links) | WebKit bug #163658 | #20732 |
| Safari | CSS min-width and max-width media features should not round fractional pixel |
WebKit bug #178261 | #25166 |
| Safari (macOS) | px, em, and rem should all behave the same in media queries when page zoom is applied |
WebKit bug #156687 | #17403 |
| Safari (macOS) | Weird button behavior with some <input type="number"> elements. |
WebKit bug #137269, Apple Safari Radar #18834768 | #8350, Normalize #283, Chromium issue #337668 |
| Safari (macOS) | Small font size when printing webpage with fixed-width .container. |
WebKit bug #138192, Apple Safari Radar #19435018 | #14868 |
| Safari (iOS) | transform: translate3d(0,0,0); rendering bug. |
WebKit bug #138162, Apple Safari Radar #18804973 | #14603 |
| Safari (iOS) | Text input’s cursor doesn’t move while scrolling the page. | WebKit bug #138201, Apple Safari Radar #18819624 | #14708 |
| Safari (iOS) | Can’t move cursor to start of text after entering long string of text into <input type="text"> |
WebKit bug #148061, Apple Safari Radar #22299624 | #16988 |
| Safari (iOS) | display: block causes text of temporal <input>s to become vertically misaligned |
WebKit bug #139848, Apple Safari Radar #19434878 | #11266, #13098 |
| Safari (iOS) | Tapping on <body> doesn’t fire click events |
WebKit bug #151933 | #16028 |
| Safari (iOS) | position:fixed is incorrectly positioned when tab bar is visible on iPhone 6S+ Safari |
WebKit bug #153056 | #18859 |
| Safari (iOS) | Tapping into an <input> within a position:fixed element scrolls to the top of the page |
WebKit bug #153224, Apple Safari Radar #24235301 | #17497 |
| Safari (iOS) | <body> with overflow:hidden CSS is scrollable on iOS |
WebKit bug #153852 | #14839 |
| Safari (iOS) | Scroll gesture in text field in position:fixed element sometimes scrolls <body> instead of scrollable ancestor |
WebKit bug #153856 | #14839 |
| Safari (iOS) | Modal with -webkit-overflow-scrolling: touch doesn’t become scrollable after added text makes it taller |
WebKit bug #158342 | #17695 |
| Safari (iOS) | Don’t make :hover sticky on touch-friendly webpages |
WebKit bug #158517 | #12832 |
| Safari (iOS) | Element which is position:fixed disappears after opening a <select> menu |
WebKit bug #162362 | #20759 |
| Safari (iPad Pro) | Rendering of descendants of position: fixed element gets clipped on iPad Pro in Landscape orientation |
WebKit bug #152637, Apple Safari Radar #24030853 | #18738 |
Most wanted features
There are several features specified in Web standards which would allow us to make Bootstrap more robust, elegant, or performant, but aren’t yet implemented in certain browsers, thus preventing us from taking advantage of them.
We publicly list these “most wanted” feature requests here, in the hopes of expediting the process of getting them implemented.
| Browser(s) | Summary of feature | Upstream issue(s) | Bootstrap issue(s) |
|---|---|---|---|
| Edge | Focusable elements should fire focus event / receive :focus styling when they receive Narrator/accessibility focus | Microsoft A11y UserVoice idea #16717318 | #20732 |
| Edge | Implement the :dir() pseudo-class from Selectors Level 4 |
Edge UserVoice idea #12299532 | #19984 |
| Edge | Implement the HTML5 <dialog> element |
Edge UserVoice idea #6508895 | #20175 |
| Edge | Fire a transitioncancel event when a CSS transition is canceled |
Edge UserVoice idea #15939898 | #20618 |
| Edge | Implement the of <selector-list> clause of the :nth-child() pseudo-class |
Edge UserVoice idea #15944476 | #20143 |
| Firefox | Implement the of <selector-list> clause of the :nth-child() pseudo-class |
Mozilla bug #854148 | #20143 |
| Firefox | Implement the HTML5 <dialog> element |
Mozilla bug #840640 | #20175 |
| Firefox | When virtual focus is on a button or link, fire actual focus on the element, too | Mozilla bug #1000082 | #20732 |
| Chrome | Fire a transitioncancel event when a CSS transition is canceled |
Chromium issue #642487 | Chromium issue #437860 |
| Chrome | Implement the of <selector-list> clause of the :nth-child() pseudo-class |
Chromium issue #304163 | #20143 |
| Chrome | Implement the :dir() pseudo-class from Selectors Level 4 |
Chromium issue #576815 | #19984 |
| Safari | Fire a transitioncancel event when a CSS transition is canceled |
WebKit bug #161535 | #20618 |
| Safari | Implement the :dir() pseudo-class from Selectors Level 4 |
WebKit bug #64861 | #19984 |
| Safari | Implement the HTML5 <dialog> element |
WebKit bug #84635 | #20175 |