Merge 0d726b7 into 1f9ca0e

.changeset/plenty-planes-fix.md

@@ -0,0 +1,5 @@
+---
+"@primer/react": minor
+---
+
+Convert SideNav component to CSS Modules behind team feature flag

packages/react/src/SideNav.module.css

@@ -0,0 +1,114 @@
+.SideNav {
+  background-color: var(--bgColor-muted);
+}
+
+.SideNavBordered {
+  border-color: var(--borderColor-default);
+  border-style: solid;
+  border-width: var(--borderWidth-thin);
+  border-radius: var(--borderRadius-medium);
+
+  /*  Remove duplicate borders from nested SideNavs */
+  & > & {
+    border-right: 0;
+    border-bottom: 0;
+    border-left: 0;
+  }
+}
+
+.SideNavLink {
+  position: relative;
+  display: block;
+  width: 100%;
+  /* stylelint-disable-next-line primer/typography */
+  font-size: 14px;
+  text-align: left;
+  text-decoration: none;
+
+  & > .SideNav {
+    border-bottom: none;
+  }
+
+  .SideNav.SideNavVariant-normal > & {
+    padding: var(--base-size-16);
+    color: var(--fgColor-default);
+    border: 0;
+    border-top: var(--borderWidth-thin) solid var(--borderColor-muted);
+
+    &:first-child {
+      border-top: 0;
+      border-top-left-radius: var(--borderRadius-medium);
+      border-top-right-radius: var(--borderRadius-medium);
+    }
+
+    &:last-child {
+      border-bottom-right-radius: var(--borderRadius-medium);
+      border-bottom-left-radius: var(--borderRadius-medium);
+    }
+
+    /* Bar on the left */
+    &::before {
+      position: absolute;
+      top: 0;
+      bottom: 0;
+      left: 0;
+      z-index: 1;
+      width: 3px;
+      pointer-events: none;
+      content: '';
+    }
+
+    &:hover {
+      text-decoration: none;
+      background-color: var(--bgColor-neutral-muted);
+    }
+
+    &:focus {
+      z-index: 1;
+      text-decoration: none;
+      background-color: var(--bgColor-neutral-muted);
+      outline: solid 2px var(--fgColor-accent);
+    }
+
+    &[aria-current='page'],
+    &[aria-selected='true'] {
+      background-color: var(--bgColor-default);
+
+      /* Bar on the left */
+      /* stylelint-disable-next-line selector-max-specificity */
+      &::before {
+        /* stylelint-disable-next-line primer/colors */
+        background-color: #fd8c73;
+      }
+    }
+  }
+
+  .SideNav.SideNavVariant-lightweight > & {
+    padding: var(--base-size-4) 0;
+    color: var(--fgColor-accent);
+
+    &:hover {
+      color: var(--fgColor-default);
+      text-decoration: none;
+    }
+
+    &:focus {
+      z-index: 1;
+      color: var(--fgColor-default);
+      text-decoration: none;
+      outline: solid 1px var(--fgColor-accent);
+    }
+
+    &[aria-current='page'],
+    &[aria-selected='true'] {
+      font-weight: var(--base-text-weight-medium);
+      color: var(--fgColor-default);
+    }
+  }
+}
+
+.SideNavLinkFull {
+  display: flex;
+  align-items: center;
+  justify-content: space-between;
+}