Alt/Option-click is B2 and Super/Cmd-click is B3, sweeps included, as in plan9port: a one-button trackpad can execute and look

The core decides it at the press (mouse.emulateButton) and keeps it to the
release, whatever keys are let go between. Ctrl-click stays a definition,
and a program tracking the mouse still gets the plain click (Alt as its
meta, Super as nothing). The SDL, macOS and web shells now pass Super; the
macOS and web shells pass Alt on a click too. A terminal's mouse report has
no Super bit, so in a terminal only Alt-click is B2.

Co-Authored-By: Claude Opus 5.5 <[email protected]>

1 files changed, 1 insertions, 1 deletions

diff --git a/src/web/app.mjs b/src/web/app.mjs
index c053d663..d2405cf4 100644
--- a/src/web/app.mjs
+++ b/src/web/app.mjs
@@ -678,7 +678,7 @@ function rgb(r, g, b) {
 }
 
 function modifiers(event) {
-  return (event.ctrlKey ? 1 : 0) | (event.altKey ? 2 : 0) | (event.shiftKey ? 4 : 0);
+  return (event.ctrlKey ? 1 : 0) | (event.altKey ? 2 : 0) | (event.shiftKey ? 4 : 0) | (event.metaKey ? 8 : 0);
 }
 
 function pointerButton(button) {