diff --git a/.c8rc.json b/.c8rc.json
new file mode 100644
index 000000000..e5293e8d0
--- /dev/null
+++ b/.c8rc.json
@@ -0,0 +1,19 @@
+{
+  "all": true,
+  "extension": [".js"],
+  "exclude": [
+    "*.config.js",
+    "**/coverage/**",
+    "**/node_modules/**",
+    "build/**",
+    "components/**/element.js",
+    "dist/**",
+    "legacy/**",
+    "out/**",
+    "scripts/**",
+    "test/**",
+    "types/**",
+    "vendor/**",
+    "wdio.conf.js"
+  ]
+}
diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index ff3c3cc4d..66fe7cb48 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -87,7 +87,7 @@ jobs:
       - name: Run unit tests
         env:
           GITHUB_TOKEN: ${{ github.token }}
-        run: npm test -- unit
+        run: npm test -- unit --coverage
 
       - name: Build
         run: npm run build
diff --git a/.gitignore b/.gitignore
index 0fe1db73f..44929ef5a 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,4 +1,5 @@
 node_modules/
+coverage/
 dist/*
 !dist/ssr/
 dist/ssr/*
diff --git a/.npmignore b/.npmignore
index 54d6e0133..b4fe9ffe0 100644
--- a/.npmignore
+++ b/.npmignore
@@ -1,4 +1,5 @@
 .github/
+coverage/
 node_modules/
 
 eslint.config.js
diff --git a/.prettierignore b/.prettierignore
index 1b763b1ba..50eec9027 100644
--- a/.prettierignore
+++ b/.prettierignore
@@ -1 +1,2 @@
 CHANGELOG.md
+coverage/
diff --git a/package-lock.json b/package-lock.json
index 0eb5832d5..dd9916f44 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -77,6 +77,7 @@
         "@wdio/mocha-framework": "^9.31.9",
         "@wdio/spec-reporter": "^9.31.2",
         "@zip.js/zip.js": "^2.15.0",
+        "c8": "^12.0.0",
         "css-loader": "^7.1.5",
         "css-minimizer-webpack-plugin": "^8.0.0",
         "dexie": "^4.4.6",
@@ -1943,6 +1944,16 @@
         "node": ">=6.9.0"
       }
     },
+    "node_modules/@bcoe/v8-coverage": {
+      "version": "1.0.2",
+      "resolved": "https://registry.npmjs.org/@bcoe/v8-coverage/-/v8-coverage-1.0.2.tgz",
+      "integrity": "sha512-6zABk/ECA/QYSCQ1NGiVwwbQerUCZ+TQbp64Q3AgmfNvurHH0j8TtXa1qbShXA6qqkpAj4V5W8pP6mLe1mcMqA==",
+      "dev": true,
+      "license": "MIT",
+      "engines": {
+        "node": ">=18"
+      }
+    },
     "node_modules/@borewit/text-codec": {
       "version": "0.2.2",
       "resolved": "https://registry.npmjs.org/@borewit/text-codec/-/text-codec-0.2.2.tgz",
@@ -5239,6 +5250,16 @@
         "node": ">=18.0.0"
       }
     },
+    "node_modules/@istanbuljs/schema": {
+      "version": "0.1.6",
+      "resolved": "https://registry.npmjs.org/@istanbuljs/schema/-/schema-0.1.6.tgz",
+      "integrity": "sha512-+Sg6GCR/wy1oSmQDFq4LQDAhm3ETKnorxN+y5nbLULOR3P0c14f2Wurzj3/xqPXtasLFfHd5iRFQ7AJt4KH2cw==",
+      "dev": true,
+      "license": "MIT",
+      "engines": {
+        "node": ">=8"
+      }
+    },
     "node_modules/@jackolope/lit-analyzer": {
       "version": "3.2.1",
       "resolved": "https://registry.npmjs.org/@jackolope/lit-analyzer/-/lit-analyzer-3.2.1.tgz",
@@ -12163,6 +12184,50 @@
         "node": ">= 0.8"
       }
     },
+    "node_modules/c8": {
+      "version": "12.0.0",
+      "resolved": "https://registry.npmjs.org/c8/-/c8-12.0.0.tgz",
+      "integrity": "sha512-4zpJvrd1nKWutnnKC2pXkFmb6iM1l+ffN//o1CzlTNwW7GSOs9a1xrLqkC48nU8oEkjmPZLPiwMsIaOvoF4Pqg==",
+      "dev": true,
+      "license": "ISC",
+      "dependencies": {
+        "@bcoe/v8-coverage": "^1.0.1",
+        "@istanbuljs/schema": "^0.1.3",
+        "find-up": "^5.0.0",
+        "foreground-child": "^3.1.1",
+        "istanbul-lib-coverage": "^3.2.0",
+        "istanbul-lib-report": "^3.0.1",
+        "istanbul-reports": "^3.1.6",
+        "test-exclude": "^8.0.0",
+        "v8-to-istanbul": "^9.0.0",
+        "yargs": "^18.0.0",
+        "yargs-parser": "^21.1.1"
+      },
+      "bin": {
+        "c8": "bin/c8.js"
+      },
+      "engines": {
+        "node": "^20.19.0 || ^22.12.0 || >=23"
+      },
+      "peerDependencies": {
+        "monocart-coverage-reports": "^2"
+      },
+      "peerDependenciesMeta": {
+        "monocart-coverage-reports": {
+          "optional": true
+        }
+      }
+    },
+    "node_modules/c8/node_modules/yargs-parser": {
+      "version": "21.1.1",
+      "resolved": "https://registry.npmjs.org/yargs-parser/-/yargs-parser-21.1.1.tgz",
+      "integrity": "sha512-tVpsJW7DdjecAiFpbIB1e3qxIQsE6NoPc5/eTdrbbIC4h0LVsWhnoa3g+m2HclBIujHzsxZ4VJVA+GUuc2/LBw==",
+      "dev": true,
+      "license": "ISC",
+      "engines": {
+        "node": ">=12"
+      }
+    },
     "node_modules/cacheable": {
       "version": "2.5.0",
       "resolved": "https://registry.npmjs.org/cacheable/-/cacheable-2.5.0.tgz",
@@ -16208,6 +16273,23 @@
         }
       }
     },
+    "node_modules/foreground-child": {
+      "version": "3.3.1",
+      "resolved": "https://registry.npmjs.org/foreground-child/-/foreground-child-3.3.1.tgz",
+      "integrity": "sha512-gIXjKqtFuWEgzFRJA9WCQeSJLZDjgJUOMCMzxtvFq/37KojM1BFGufqsCy0r4qSQmYLsZYMeyRqzIWOMup03sw==",
+      "dev": true,
+      "license": "ISC",
+      "dependencies": {
+        "cross-spawn": "^7.0.6",
+        "signal-exit": "^4.0.1"
+      },
+      "engines": {
+        "node": ">=14"
+      },
+      "funding": {
+        "url": "https://github.com/sponsors/isaacs"
+      }
+    },
     "node_modules/formdata-polyfill": {
       "version": "4.0.10",
       "resolved": "https://registry.npmjs.org/formdata-polyfill/-/formdata-polyfill-4.0.10.tgz",
@@ -17264,6 +17346,13 @@
       ],
       "license": "MIT"
     },
+    "node_modules/html-escaper": {
+      "version": "2.0.2",
+      "resolved": "https://registry.npmjs.org/html-escaper/-/html-escaper-2.0.2.tgz",
+      "integrity": "sha512-H2iMtd0I4Mt5eYiapRdIDjp+XzelXQ0tFE4JS7YFwFevXXMmOp9myNrUvCg0D6ws8iqkRPBfKHgbwig1SmlLfg==",
+      "dev": true,
+      "license": "MIT"
+    },
     "node_modules/html-tags": {
       "version": "5.1.0",
       "resolved": "https://registry.npmjs.org/html-tags/-/html-tags-5.1.0.tgz",
@@ -18332,6 +18421,45 @@
         "node": ">=0.10.0"
       }
     },
+    "node_modules/istanbul-lib-coverage": {
+      "version": "3.2.2",
+      "resolved": "https://registry.npmjs.org/istanbul-lib-coverage/-/istanbul-lib-coverage-3.2.2.tgz",
+      "integrity": "sha512-O8dpsF+r0WV/8MNRKfnmrtCWhuKjxrq2w+jpzBL5UZKTi2LeVWnWOmWRxFlesJONmc+wLAGvKQZEOanko0LFTg==",
+      "dev": true,
+      "license": "BSD-3-Clause",
+      "engines": {
+        "node": ">=8"
+      }
+    },
+    "node_modules/istanbul-lib-report": {
+      "version": "3.0.1",
+      "resolved": "https://registry.npmjs.org/istanbul-lib-report/-/istanbul-lib-report-3.0.1.tgz",
+      "integrity": "sha512-GCfE1mtsHGOELCU8e/Z7YWzpmybrx/+dSTfLrvY8qRmaY6zXTKWn6WQIjaAFw069icm6GVMNkgu0NzI4iPZUNw==",
+      "dev": true,
+      "license": "BSD-3-Clause",
+      "dependencies": {
+        "istanbul-lib-coverage": "^3.0.0",
+        "make-dir": "^4.0.0",
+        "supports-color": "^7.1.0"
+      },
+      "engines": {
+        "node": ">=10"
+      }
+    },
+    "node_modules/istanbul-reports": {
+      "version": "3.2.0",
+      "resolved": "https://registry.npmjs.org/istanbul-reports/-/istanbul-reports-3.2.0.tgz",
+      "integrity": "sha512-HGYWWS/ehqTV3xN10i23tkPkpH46MLCIMFNCaaKNavAXTF1RkqxawEPtnjnGZ6XKSInBKkiOA5BKS+aZiY3AvA==",
+      "dev": true,
+      "license": "BSD-3-Clause",
+      "dependencies": {
+        "html-escaper": "^2.0.0",
+        "istanbul-lib-report": "^3.0.0"
+      },
+      "engines": {
+        "node": ">=8"
+      }
+    },
     "node_modules/jake": {
       "version": "10.9.2",
       "resolved": "https://registry.npmjs.org/jake/-/jake-10.9.2.tgz",
@@ -19631,6 +19759,22 @@
         "url": "https://github.com/sponsors/sindresorhus"
       }
     },
+    "node_modules/make-dir": {
+      "version": "4.0.0",
+      "resolved": "https://registry.npmjs.org/make-dir/-/make-dir-4.0.0.tgz",
+      "integrity": "sha512-hXdUTZYIVOt1Ex//jAQi+wTZZpUpwBj/0QsOzqegb3rGMMeJiSEu5xLHnYfBrRV4RH2+OCSOO95Is/7x1WJ4bw==",
+      "dev": true,
+      "license": "MIT",
+      "dependencies": {
+        "semver": "^7.5.3"
+      },
+      "engines": {
+        "node": ">=10"
+      },
+      "funding": {
+        "url": "https://github.com/sponsors/sindresorhus"
+      }
+    },
     "node_modules/markdown-table": {
       "version": "3.0.4",
       "resolved": "https://registry.npmjs.org/markdown-table/-/markdown-table-3.0.4.tgz",
@@ -27167,6 +27311,21 @@
       "dev": true,
       "license": "MIT"
     },
+    "node_modules/test-exclude": {
+      "version": "8.0.0",
+      "resolved": "https://registry.npmjs.org/test-exclude/-/test-exclude-8.0.0.tgz",
+      "integrity": "sha512-ZOffsNrXYggvU1mDGHk54I96r26P8SyMjO5slMKSc7+IWmtB/MQKnEC2fP51imB3/pT6YK5cT5E8f+Dd9KdyOQ==",
+      "dev": true,
+      "license": "ISC",
+      "dependencies": {
+        "@istanbuljs/schema": "^0.1.2",
+        "glob": "^13.0.6",
+        "minimatch": "^10.2.2"
+      },
+      "engines": {
+        "node": "20 || >=22"
+      }
+    },
     "node_modules/text-decoder": {
       "version": "1.2.3",
       "resolved": "https://registry.npmjs.org/text-decoder/-/text-decoder-1.2.3.tgz",
@@ -27981,6 +28140,28 @@
         "uuid": "dist-node/bin/uuid"
       }
     },
+    "node_modules/v8-to-istanbul": {
+      "version": "9.3.0",
+      "resolved": "https://registry.npmjs.org/v8-to-istanbul/-/v8-to-istanbul-9.3.0.tgz",
+      "integrity": "sha512-kiGUalWN+rgBJ/1OHZsBtU4rXZOfj/7rKQxULKlIzwzQSvMJUUNgPwJEEh7gU6xEVxC0ahoOBvN2YI8GH6FNgA==",
+      "dev": true,
+      "license": "ISC",
+      "dependencies": {
+        "@jridgewell/trace-mapping": "^0.3.12",
+        "@types/istanbul-lib-coverage": "^2.0.1",
+        "convert-source-map": "^2.0.0"
+      },
+      "engines": {
+        "node": ">=10.12.0"
+      }
+    },
+    "node_modules/v8-to-istanbul/node_modules/convert-source-map": {
+      "version": "2.0.0",
+      "resolved": "https://registry.npmjs.org/convert-source-map/-/convert-source-map-2.0.0.tgz",
+      "integrity": "sha512-Kvp459HrV2FEJ1CAsi1Ku+MY3kasH19TFykTz2xWmMeq6bk2NU3XXvfJ+Q61m0xktWwt+1HSYf3JZsTms3aRJg==",
+      "dev": true,
+      "license": "MIT"
+    },
     "node_modules/validate-npm-package-license": {
       "version": "3.0.4",
       "resolved": "https://registry.npmjs.org/validate-npm-package-license/-/validate-npm-package-license-3.0.4.tgz",
diff --git a/package.json b/package.json
index 6ffa0f882..e65933c62 100644
--- a/package.json
+++ b/package.json
@@ -99,6 +99,7 @@
     "@wdio/mocha-framework": "^9.31.9",
     "@wdio/spec-reporter": "^9.31.2",
     "@zip.js/zip.js": "^2.15.0",
+    "c8": "^12.0.0",
     "css-loader": "^7.1.5",
     "css-minimizer-webpack-plugin": "^8.0.0",
     "dexie": "^4.4.6",
diff --git a/scripts/tests.js b/scripts/tests.js
index 4614a026a..9291fcb79 100644
--- a/scripts/tests.js
+++ b/scripts/tests.js
@@ -32,13 +32,24 @@ await yargs(hideBin(process.argv))
       process.exitCode = 1;
     }
   })
-  .command("unit", "run unit tests", {}, () => {
-    try {
-      execSync(`node --test "**/*.test.js"`, { stdio: "inherit" });
-    } catch {
-      process.exitCode = 1;
-    }
-  })
+  .command(
+    "unit",
+    "run unit tests",
+    (yargs) =>
+      yargs.option("coverage", {
+        describe: "report test coverage with c8",
+        type: "boolean",
+        default: false,
+      }),
+    (argv) => {
+      const prefix = argv.coverage ? "npx c8 " : "";
+      try {
+        execSync(`${prefix}node --test "**/*.test.js"`, { stdio: "inherit" });
+      } catch {
+        process.exitCode = 1;
+      }
+    },
+  )
   .command(
     "e2e",
     "run e2e tests",
diff --git a/tsconfig.json b/tsconfig.json
index 728a52d6e..59a7b2e08 100644
--- a/tsconfig.json
+++ b/tsconfig.json
@@ -77,5 +77,5 @@
       }
     ]
   },
-  "exclude": ["node_modules", "dist", "out", "legacy", "vendor"]
+  "exclude": ["node_modules", "coverage", "dist", "out", "legacy", "vendor"]
 }