Allowlist web-feature tags

api/Request.json

@@ -236,9 +236,6 @@
             "description": "`init.keepalive` parameter",
             "mdn_url": "https://developer.mozilla.org/docs/Web/API/Request/keepalive",
             "spec_url": "https://fetch.spec.whatwg.org/#dom-requestinit-keepalive",
-            "tags": [
-              "web-features:fetch-keepalive"
-            ],
             "support": {
               "chrome": {
                 "version_added": "66"

api/WebSocketError.json

@@ -3,7 +3,6 @@
     "WebSocketError": {
       "__compat": {
         "tags": [
-          "web-features:web-socket-stream",
           "web-features:websockets"
         ],
         "support": {
@@ -40,7 +39,6 @@
         "__compat": {
           "description": "`WebSocketError()` constructor",
           "tags": [
-            "web-features:web-socket-stream",
             "web-features:websockets"
           ],
           "support": {
@@ -77,7 +75,6 @@
       "closeCode": {
         "__compat": {
           "tags": [
-            "web-features:web-socket-stream",
             "web-features:websockets"
           ],
           "support": {
@@ -114,7 +111,6 @@
       "reason": {
         "__compat": {
           "tags": [
-            "web-features:web-socket-stream",
             "web-features:websockets"
           ],
           "support": {

api/WebSocketStream.json

@@ -3,9 +3,6 @@
     "WebSocketStream": {
       "__compat": {
         "mdn_url": "https://developer.mozilla.org/docs/Web/API/WebSocketStream",
-        "tags": [
-          "web-features:web-socket-stream"
-        ],
         "support": {
           "chrome": {
             "version_added": "124"
@@ -40,9 +37,6 @@
         "__compat": {
           "description": "`WebSocketStream()` constructor",
           "mdn_url": "https://developer.mozilla.org/docs/Web/API/WebSocketStream/WebSocketStream",
-          "tags": [
-            "web-features:web-socket-stream"
-          ],
           "support": {
             "chrome": {
               "version_added": "124"
@@ -77,9 +71,6 @@
       "close": {
         "__compat": {
           "mdn_url": "https://developer.mozilla.org/docs/Web/API/WebSocketStream/close",
-          "tags": [
-            "web-features:web-socket-stream"
-          ],
           "support": {
             "chrome": {
               "version_added": "124"
@@ -114,9 +105,6 @@
       "closed": {
         "__compat": {
           "mdn_url": "https://developer.mozilla.org/docs/Web/API/WebSocketStream/closed",
-          "tags": [
-            "web-features:web-socket-stream"
-          ],
           "support": {
             "chrome": {
               "version_added": "124"
@@ -151,9 +139,6 @@
       "opened": {
         "__compat": {
           "mdn_url": "https://developer.mozilla.org/docs/Web/API/WebSocketStream/opened",
-          "tags": [
-            "web-features:web-socket-stream"
-          ],
           "support": {
             "chrome": {
               "version_added": "124"
@@ -188,9 +173,6 @@
       "url": {
         "__compat": {
           "mdn_url": "https://developer.mozilla.org/docs/Web/API/WebSocketStream/url",
-          "tags": [
-            "web-features:web-socket-stream"
-          ],
           "support": {
             "chrome": {
               "version_added": "124"

html/elements/script.json

@@ -641,9 +641,6 @@
             "integrity": {
               "__compat": {
                 "spec_url": "https://html.spec.whatwg.org/multipage/webappapis.html#normalizing-a-module-integrity-map",
-                "tags": [
-                  "web-features:import-map-integrity"
-                ],
                 "support": {
                   "chrome": {
                     "version_added": "127"

lint/linter/test-tags.test.ts

@@ -28,7 +28,7 @@ describe('test.check', () => {
 
   it('should not log error when tags are valid', () => {
     const data: CompatStatement = {
-      tags: ['web-features:tag1'],
+      tags: ['web-features:javascript'],
       support: {},
     };
 
@@ -61,15 +61,19 @@ describe('test.check', () => {
     assert.ok(logger.messages[0].message.includes('Invalid tag found:'));
   });
 
-  it('should log error when tag name uses characters other than lowercase alphanumeric and hyphen', () => {
+  it('should log an error when an invalid web-feature ID is used', () => {
     const data: CompatStatement = {
-      tags: ['namespace1:tag$'],
+      tags: ['web-features:foo'],
       support: {},
     };
 
     test.check(logger, { data });
 
     assert.equal(logger.messages.length, 1);
-    assert.ok(logger.messages[0].message.includes('Invalid tag found:'));
+    assert.ok(
+      logger.messages[0].message.includes(
+        'Non-registered web-features ID found:',
+      ),
+    );
   });
 });

lint/linter/test-tags.ts

@@ -2,11 +2,13 @@
  * See LICENSE file for more information. */
 
 import chalk from 'chalk-template';
+import { features } from 'web-features';
 
 import { Linter, Logger, LinterData } from '../utils.js';
 import { CompatStatement } from '../../types/types.js';
 
 const allowedNamespaces = ['web-features'];
+const validFeatureIDs = Object.keys(features);
 
 /**
  * Process the data for spec URL errors
@@ -20,19 +22,29 @@ const processData = (data: CompatStatement, logger: Logger): void => {
 
   for (const tag of data.tags) {
     if (
-      !allowedNamespaces.some(
-        (namespace) =>
-          tag.startsWith(namespace + ':') &&
-          tag.split(':')[1].match(/^[a-z0-9-]*$/),
-      )
+      !allowedNamespaces.some((namespace) => tag.startsWith(namespace + ':'))
     ) {
       logger.error(
         chalk`Invalid tag found: {bold ${tag}}. Check if:
-         - tag tag has a namespace
-         - the tag uses one of the allowed namespaces: {bold ${allowedNamespaces}}
-         - the tag name (after the namespace) uses only lowercase alphanumeric characters (a-z and 0-9) plus the - character (hyphen or minus sign)`,
+         - the tag has a namespace
+         - the tag uses one of the allowed namespaces: {bold ${allowedNamespaces}}`,
       );
     }
+
+    if (tag.startsWith('web-features')) {
+      const featureID = tag.split(':').pop() as string;
+
+      if (
+        !tag.includes(':snapshot:') && // ignore web-feature snapshots for now
+        !validFeatureIDs.includes(featureID)
+      ) {
+        logger.error(
+          chalk`Non-registered web-features ID found: {bold ${featureID}}.
+          - New web-feature IDs need to be present in https://github.com/web-platform-dx/web-features first.
+          - Check for typos or remove tag. Tagging will be taken care of by web-features maintainers.`,
+        );
+      }
+    }
   }
 };
 

package.json

@@ -89,6 +89,7 @@
     "tempy": "^3.1.0",
     "tsx": "^4.19.2",
     "typescript": "~5.7.2",
+    "web-features": "^2.15.0",
     "web-specs": "^3.0.0",
     "yargs": "~17.7.0"
   },