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+---
+title: Allow Data Attributes with Strict Templates
+impact: MEDIUM
+impactDescription: fixes data-testid and data-* attribute errors in strict mode
+type: capability
+tags: dataAttributes, vueCompilerOptions, strictTemplates, data-testid, testing
+---
+
+# Allow Data Attributes with Strict Templates
+
+**Impact: MEDIUM** - fixes data-testid and data-* attribute errors in strict mode
+
+With `strictTemplates` enabled, `data-*` attributes on components cause type errors. Use the `dataAttributes` option to allow specific patterns.
+
+## Problem
+
+```vue
+<template>
+  <!-- Error: Property 'data-testid' does not exist on type... -->
+  <MyComponent data-testid="submit-button" />
+
+  <!-- Error: Property 'data-cy' does not exist on type... -->
+  <MyComponent data-cy="login-form" />
+</template>
+```
+
+## Solution
+
+Configure `dataAttributes` to allow specific patterns:
+
+```json
+// tsconfig.json or tsconfig.app.json
+{
+  "vueCompilerOptions": {
+    "strictTemplates": true,
+    "dataAttributes": ["data-*"]
+  }
+}
+```
+
+Now all `data-*` attributes are allowed on any component.
+
+## Specific Patterns
+
+You can be more selective:
+
+```json
+{
+  "vueCompilerOptions": {
+    "dataAttributes": [
+      "data-testid",
+      "data-cy",
+      "data-test-*"
+    ]
+  }
+}
+```
+
+This only allows the specified patterns, not all data attributes.
+
+## Common Testing Attributes
+
+For testing libraries, allow their specific attributes:
+
+| Library | Attribute | Pattern |
+|---------|-----------|---------|
+| Testing Library | `data-testid` | `"data-testid"` |
+| Cypress | `data-cy` | `"data-cy"` |
+| Playwright | `data-testid` | `"data-testid"` |
+| Generic | All data attributes | `"data-*"` |
+
+## Reference
+
+- [Vue Language Tools Wiki - Vue Compiler Options](https://github.com/vuejs/language-tools/wiki/Vue-Compiler-Options)