This PR completes the migration from Bootstrap 4 to Bootstrap 5.3.5
following the plan outlined in
[docs/Bootstrap5Migration.md](https://github.com/compiler-explorer/compiler-explorer/blob/mg/bootstrap5/docs/Bootstrap5Migration.md).
## Migration Process
We followed a phased approach as documented in the migration plan:
1. **Phase 1: Dependency Updates and Basic Setup**
- Updated Bootstrap from 4.6.2 to 5.3.5
- Added @popperjs/core dependency (replacing Popper.js)
- Updated Tom Select theme from bootstrap4 to bootstrap5
2. **Phase 2: Global CSS Class Migration**
- Updated directional utility classes (ml/mr → ms/me)
- Updated floating utility classes (float-left/right → float-start/end)
- Updated text alignment classes (text-left/right → text-start/end)
3. **Phase 3: HTML Attribute Updates**
- Updated data attributes to use Bootstrap 5 prefixes (data-bs-toggle,
data-bs-target, etc.)
- Fixed tab navigation issues
4. **Phase 4: JavaScript API Compatibility Layer**
- Created bootstrap-utils.ts compatibility layer
- Updated component initialization for modals, dropdowns, popovers, etc.
5. **Phase 5: Component Migration**
- Updated and tested specific components (modals, dropdowns, toasts,
etc.)
- Fixed styling issues in cards and button groups
6. **Phase 6: Form System Updates**
- Updated form control classes to Bootstrap 5 standards
- Updated checkbox/radio markup patterns
- Simplified input groups
7. **Phase 7: Navbar Structure Updates**
- Updated navbar structure with container-fluid
- Fixed responsive behavior
8. **Phase 8: SCSS Variables and Theming**
- Added custom CSS fixes for navbar alignment
- Verified theme compatibility
9. **Phase 9: Accessibility Improvements**
- Updated sr-only to visually-hidden
- Added proper ARIA attributes
- Enhanced screen reader support
## Key Changes
- No more jQuery dependency in Bootstrap 5
- New prefix for data attributes (data-bs-*)
- Improved accessibility with ARIA attributes
- Updated positioning classes (start/end instead of left/right)
- Simplified input group structure
## Test Plan
1. **Navigation Testing**
- Verify all dropdown menus open and close properly
- Test mobile menu responsiveness
- Check tab navigation in settings dialog
2. **Component Testing**
- Verify all modals open and close correctly (settings, share,
load/save)
- Test tooltips and popovers
- Check form controls in different dialogs
3. **Layout Testing**
- Test responsiveness on different screen sizes
- Verify proper alignment of elements
- Check dark mode compatibility
4. **Specific Features to Test**
- Compiler selection and options
- Share dialog functionality
- Settings dialog
- Tree view (IDE mode)
- Font selection dropdown
5. **Browser Testing**
- Test in Chrome, Firefox, Safari
- Test in mobile browsers
## Note on Further Improvements
After this migration is stable, we could consider Phase 12: removing
jQuery dependency entirely, as Bootstrap 5 no longer requires it. This
would be a separate effort.
---------
Co-authored-by: Claude <noreply@anthropic.com>
Hey friends, it's been a while since last time :)
There are quite a few conditions/cases where the library alert will pop
up, without anything meaningful inside of it. This is particularly the
case for Rust where you have the 100 crates on stable, but zero support
in beta/nightly. I figured informing the user in cases like this would
be nice to have.
This PR adds a rather simple alerting mechanism to alert the user of any
conditions that might not be as apparent (such as Rust crates only being
on stable)
Below is a small gif of how it works. I'm not sure this is the easiest
way to convey this information (especially considering the modal popup
overshadows the alert) so please share any other ideas. Maybe it's
better to have the content fill the modal instead?

Relevant issues: #3766#6250
In conversation with @mknejp he pointed out that it can be frustating
when having a browser loaded up with many tabs of CE links, then
reloading the browser (e.g. a reboot, or open/closing the tabs), that
upon reload all the tabs will have the same, shared state (corresponding
to whichever saved to local storage last).
This change:
- stores state in _both_ session and local storage
- removes from both on UI reset
- loads first from session storage and then falls back to local storage
The net result is:
- tabs reopened with "ctrl-shift T" will regain their prior state, as do
any other tabs for which the browser thinks are part of the same session
(like on a "reopen tabs" plugins etc)
- newly-opened tabs still have the prior behaviour of using whatever the
most recently opened tab had as its starting state
Some more info on session vs local storage
[here](https://developer.mozilla.org/en-US/docs/Web/API/Window/sessionStorage)
Makes the Compiler Explorer app, and all the tooling ESM compatible.
Things that have been done:
1. The package.json has `type: module` now
2. All relative imports have a .js ending
3. All directory imports are now directory/index.js to comply with ESM
standards
4. Dependency node-graceful is now imported into tree, because the
package is broken under esm
5. Dependency p-queue has been bumped to 7.x with ESM support
6. Dependency profanities has been bumped to 3.x with ESM support
7. Webpack config is now both ESM and CommonJS compatible
8. Non-ESM compatible imports have been rewritten
9. ESLint configuration has been tweaked to not fail on .js imports
10. Mocha is now hacked together and ran with ts-node-esm
11. Webpack is now hacked together and ran with ts-node-esm
12. Webpack config is now ESM compatible, so that it can be used in the
dev server
13. Cypress code still runs commonjs, and has been excluded from the
tsconfig
14. All sinon mock tests have been commented out, because sinon module
mocks do not work with ESModules (because ESModules are immutable)
A lot of tests are now giving warnings/errors to stdout, yet still pass.
Docenizer codegenerator scripts have been updated, but I did not re-run
them, and instead just changed their code.
---------
Co-authored-by: Matt Godbolt <matt@godbolt.org>
* Group some files to their own folders
In etc/scripts/, added disasms/, docenizers/, and util/ folders
In lib/, added mapfiles/, and parsers/ folders (+moved google.js to
shortener)
In static/, added widgets/ folder
Added cypress folder to .gitignore
* Address Matt's PR reviews
* Move new Pane renaming to folder