fix: edge tooltips were hidden inside the box (#5)

* fix: edge tooltips were hidden inside the box

* Update README.md

README.md

@@ -368,4 +368,4 @@ npm run check:pages        # pages (astro check + tsc)
 - [ ] Refine the status page to look... well... less IA generated.
 - [ ] Initial support for incident management (manual status overrides, incident timeline).
 - [x] Branded status page (simple custom banner).
-- [] Add support for notifications other than webhooks.
+- [ ] Add support for notifications other than webhooks.

status-page/src/components/UptimeBars.astro

@@ -61,6 +61,8 @@ function getBarColor(uptimePercent: number | undefined): string {
     gap: 1px;
     width: 100%;
     height: 14px;
+    position: relative;
+    overflow: visible;
   }
 
   .bar {
@@ -93,13 +95,17 @@ function getBarColor(uptimePercent: number | undefined): string {
     background: var(--no-data);
   }
 
-  /* Tooltip */
+  /* Tooltip - positioned below to avoid conflict with bar labels */
+  .bar {
+    position: relative;
+  }
+  
   .bar::before {
     content: attr(data-tooltip);
     position: absolute;
-    bottom: 100%;
+    top: calc(100% + 8px);
     left: 50%;
-    transform: translateX(-50%) translateY(-8px);
+    transform: translateX(-50%);
     background: var(--text);
     color: var(--bg);
     padding: 4px 8px;
@@ -112,16 +118,56 @@ function getBarColor(uptimePercent: number | undefined): string {
     transition: opacity 0.2s ease;
     pointer-events: none;
     z-index: 1000;
+    /* Prevent tooltip overflow */
+    max-width: 200px;
+    overflow: hidden;
+    text-overflow: ellipsis;
+    /* Ensure tooltip stays within screen bounds */
+    left: 50%;
+    transform: translateX(-50%);
+    /* Constrain to viewport */
+    max-width: min(200px, calc(100vw - 32px));
+  }
+
+  /* For left-edge bars, prevent left overflow */
+  .bar:nth-child(1)::before,
+  .bar:nth-child(2)::before,
+  .bar:nth-child(3)::before,
+  .bar:nth-child(4)::before,
+  .bar:nth-child(5)::before,
+  .bar:nth-child(6)::before,
+  .bar:nth-child(7)::before,
+  .bar:nth-child(8)::before,
+  .bar:nth-child(9)::before,
+  .bar:nth-child(10)::before {
+    left: 0;
+    transform: translateX(0);
+  }
+  
+  /* For right-edge bars, prevent right overflow */
+  .bar:nth-last-child(1)::before,
+  .bar:nth-last-child(2)::before,
+  .bar:nth-last-child(3)::before,
+  .bar:nth-last-child(4)::before,
+  .bar:nth-last-child(5)::before,
+  .bar:nth-last-child(6)::before,
+  .bar:nth-last-child(7)::before,
+  .bar:nth-last-child(8)::before,
+  .bar:nth-last-child(9)::before,
+  .bar:nth-last-child(10)::before {
+    left: auto;
+    right: 0;
+    transform: translateX(0);
   }
 
   .bar::after {
     content: '';
     position: absolute;
-    bottom: 100%;
+    top: calc(100% + 2px);
     left: 50%;
-    transform: translateX(-50%) translateY(-2px);
+    transform: translateX(-50%);
     border: 4px solid transparent;
-    border-top-color: var(--text);
+    border-bottom-color: var(--text);
     opacity: 0;
     visibility: hidden;
     transition: opacity 0.2s ease;
@@ -129,6 +175,21 @@ function getBarColor(uptimePercent: number | undefined): string {
     z-index: 1000;
   }
   
+  /* Adjust arrow position for edge bars */
+  .bar:nth-child(1)::after,
+  .bar:nth-child(2)::after,
+  .bar:nth-child(3)::after,
+  .bar:nth-child(4)::after,
+  .bar:nth-child(5)::after,
+  .bar:nth-child(6)::after,
+  .bar:nth-child(7)::after,
+  .bar:nth-child(8)::after,
+  .bar:nth-child(9)::after,
+  .bar:nth-child(10)::after {
+    left: 8px;
+    transform: translateX(0);
+  }
+  
   .bar:hover::before,
   .bar:focus::before,
   .bar:hover::after,
@@ -136,12 +197,4 @@ function getBarColor(uptimePercent: number | undefined): string {
     opacity: 1;
     visibility: visible;
   }
-
-  .bar-labels {
-    display: flex;
-    justify-content: space-between;
-    font-size: 9px;
-    color: var(--text-dim);
-    margin-top: 3px;
-  }
 </style>

status-page/src/scripts/charts.ts

@@ -79,18 +79,18 @@ function tooltipPlugin(strokeColor: string): uPlot.Plugin {
           tooltipElement = document.createElement('div');
           tooltipElement.className = 'chart-tooltip';
           tooltipElement.style.cssText = `
-            position: absolute;
-            pointer-events: none;
-            background: rgba(15, 23, 42, 0.95);
-            border: 1px solid ${strokeColor};
-            color: #e2e8f0;
-            padding: 4px 8px;
-            border-radius: 4px;
-            font: 500 10px 'Geist Mono', monospace;
-            display: none;
-            white-space: nowrap;
-            z-index: 10;
-          `;
+             position: absolute;
+             pointer-events: none;
+             background: rgba(15, 23, 42, 0.95);
+             border: 1px solid ${strokeColor};
+             color: #e2e8f0;
+             padding: 4px 8px;
+             border-radius: 4px;
+             font: 500 10px 'Geist Mono', monospace;
+             display: none;
+             white-space: nowrap;
+             z-index: 10;
+           `;
           // Cast needed: @cloudflare/workers-types overrides DOM append() signature
           (over as ParentNode).append(tooltipElement);
 
@@ -131,18 +131,54 @@ function tooltipPlugin(strokeColor: string): uPlot.Plugin {
           const msString = Math.round(yValue) + ' ms';
           tooltipElement.textContent = `${timeString}  ${msString}`;
 
-          // Position tooltip, flipping side if near right edge
+          // Position tooltip, ensuring it stays within chart bounds
           const tipWidth = tooltipElement.offsetWidth;
+          const tipHeight = tooltipElement.offsetHeight;
           const plotWidth = over.clientWidth;
+          const plotHeight = over.clientHeight;
           const shiftX = 12;
           const shiftY = -10;
-          let posLeft = left + shiftX;
-          if (posLeft + tipWidth > plotWidth) {
+
+          // Calculate horizontal position - choose side with more space
+          let posLeft: number;
+          const spaceRight = plotWidth - (left + shiftX);
+          const spaceLeft = left - shiftX;
+
+          // Default to right side if there's enough space
+          if (spaceRight >= tipWidth) {
+            posLeft = left + shiftX;
+          }
+          // Try left side if there's more space there
+          else if (spaceLeft >= tipWidth) {
             posLeft = left - tipWidth - shiftX;
           }
+          // Not enough space on either side, choose the better option
+          else {
+            // If right side has more space than left, use right side clamped
+            if (spaceRight > spaceLeft) {
+              posLeft = plotWidth - tipWidth;
+            } else {
+              // Use left side clamped
+              posLeft = 0;
+            }
+          }
+
+          // Ensure we don't go outside bounds
+          posLeft = Math.max(0, Math.min(posLeft, plotWidth - tipWidth));
+
+          // Calculate vertical position
+          let posTop = (top ?? 0) + shiftY;
+          // Check if tooltip would overflow top edge
+          if (posTop < 0) {
+            posTop = 0;
+          }
+          // Check if tooltip would overflow bottom edge
+          else if (posTop + tipHeight > plotHeight) {
+            posTop = plotHeight - tipHeight;
+          }
 
           tooltipElement.style.left = posLeft + 'px';
-          tooltipElement.style.top = (top ?? 0) + shiftY + 'px';
+          tooltipElement.style.top = posTop + 'px';
         },
       ],
     },