Add typescript guideline and typescript-specific eslint plugins and fix issues (#31521)

1. Add some general guidelines how to write our typescript code 2. Add `@typescript-eslint/eslint-plugin`, general typescript rules 3. Add `eslint-plugin-deprecation` to detect deprecated code 4. Fix all new lint issues that came up
2024-07-03 17:48:14 +02:00 · 2024-07-03 17:48:14 +02:00 · 2c92c7c522
--- a/.eslintrc.yaml
+++ b/.eslintrc.yaml
@ -13,6 +13,7 @@ parserOptions:
  ecmaVersion: latest
  project: true
  extraFileExtensions: [".vue"]
+  parser: "@typescript-eslint/parser" # for vue plugin - https://eslint.vuejs.org/user-guide/#how-to-use-a-custom-parser

 settings:
  import/extensions: [".js", ".ts"]
@ -24,7 +25,9 @@ settings:
 plugins:
  - "@eslint-community/eslint-plugin-eslint-comments"
  - "@stylistic/eslint-plugin-js"
+  - "@typescript-eslint/eslint-plugin"
  - eslint-plugin-array-func
+  - eslint-plugin-deprecation
  - eslint-plugin-github
  - eslint-plugin-i
  - eslint-plugin-no-jquery
@ -209,6 +212,123 @@ rules:
  "@stylistic/js/wrap-iife": [2, inside]
  "@stylistic/js/wrap-regex": [0]
  "@stylistic/js/yield-star-spacing": [2, after]
+  "@typescript-eslint/adjacent-overload-signatures": [0]
+  "@typescript-eslint/array-type": [0]
+  "@typescript-eslint/await-thenable": [2]
+  "@typescript-eslint/ban-ts-comment": [2, {'ts-expect-error': false, 'ts-ignore': true, 'ts-nocheck': false, 'ts-check': false}]
+  "@typescript-eslint/ban-tslint-comment": [0]
+  "@typescript-eslint/ban-types": [2, {extendDefaults: true, types: {Function: false}}]
+  "@typescript-eslint/class-literal-property-style": [0]
+  "@typescript-eslint/class-methods-use-this": [0]
+  "@typescript-eslint/consistent-generic-constructors": [0]
+  "@typescript-eslint/consistent-indexed-object-style": [0]
+  "@typescript-eslint/consistent-return": [0]
+  "@typescript-eslint/consistent-type-assertions": [2, {assertionStyle: as, objectLiteralTypeAssertions: allow}]
+  "@typescript-eslint/consistent-type-definitions": [2, type]
+  "@typescript-eslint/consistent-type-exports": [2, {fixMixedExportsWithInlineTypeSpecifier: false}]
+  "@typescript-eslint/consistent-type-imports": [2, {prefer: type-imports, fixStyle: separate-type-imports, disallowTypeAnnotations: true}]
+  "@typescript-eslint/default-param-last": [0]
+  "@typescript-eslint/dot-notation": [0]
+  "@typescript-eslint/explicit-function-return-type": [0]
+  "@typescript-eslint/explicit-member-accessibility": [0]
+  "@typescript-eslint/explicit-module-boundary-types": [0]
+  "@typescript-eslint/init-declarations": [0]
+  "@typescript-eslint/max-params": [0]
+  "@typescript-eslint/member-ordering": [0]
+  "@typescript-eslint/method-signature-style": [0]
+  "@typescript-eslint/naming-convention": [0]
+  "@typescript-eslint/no-array-constructor": [2]
+  "@typescript-eslint/no-array-delete": [2]
+  "@typescript-eslint/no-base-to-string": [0]
+  "@typescript-eslint/no-confusing-non-null-assertion": [2]
+  "@typescript-eslint/no-confusing-void-expression": [0]
+  "@typescript-eslint/no-dupe-class-members": [0]
+  "@typescript-eslint/no-duplicate-enum-values": [2]
+  "@typescript-eslint/no-duplicate-type-constituents": [2, {ignoreUnions: true}]
+  "@typescript-eslint/no-dynamic-delete": [0]
+  "@typescript-eslint/no-empty-function": [0]
+  "@typescript-eslint/no-empty-interface": [0]
+  "@typescript-eslint/no-explicit-any": [0]
+  "@typescript-eslint/no-extra-non-null-assertion": [2]
+  "@typescript-eslint/no-extraneous-class": [0]
+  "@typescript-eslint/no-floating-promises": [0]
+  "@typescript-eslint/no-for-in-array": [2]
+  "@typescript-eslint/no-implied-eval": [2]
+  "@typescript-eslint/no-import-type-side-effects": [0] # dupe with consistent-type-imports
+  "@typescript-eslint/no-inferrable-types": [0]
+  "@typescript-eslint/no-invalid-this": [0]
+  "@typescript-eslint/no-invalid-void-type": [0]
+  "@typescript-eslint/no-loop-func": [0]
+  "@typescript-eslint/no-loss-of-precision": [2]
+  "@typescript-eslint/no-magic-numbers": [0]
+  "@typescript-eslint/no-meaningless-void-operator": [0]
+  "@typescript-eslint/no-misused-new": [2]
+  "@typescript-eslint/no-misused-promises": [2, {checksVoidReturn: {attributes: false, arguments: false}}]
+  "@typescript-eslint/no-mixed-enums": [0]
+  "@typescript-eslint/no-namespace": [2]
+  "@typescript-eslint/no-non-null-asserted-nullish-coalescing": [0]
+  "@typescript-eslint/no-non-null-asserted-optional-chain": [2]
+  "@typescript-eslint/no-non-null-assertion": [0]
+  "@typescript-eslint/no-redeclare": [0]
+  "@typescript-eslint/no-redundant-type-constituents": [2]
+  "@typescript-eslint/no-require-imports": [0]
+  "@typescript-eslint/no-restricted-imports": [0]
+  "@typescript-eslint/no-shadow": [0]
+  "@typescript-eslint/no-this-alias": [0] # handled by unicorn/no-this-assignment
+  "@typescript-eslint/no-unnecessary-boolean-literal-compare": [0]
+  "@typescript-eslint/no-unnecessary-condition": [0]
+  "@typescript-eslint/no-unnecessary-qualifier": [0]
+  "@typescript-eslint/no-unnecessary-template-expression": [0]
+  "@typescript-eslint/no-unnecessary-type-arguments": [0]
+  "@typescript-eslint/no-unnecessary-type-assertion": [2]
+  "@typescript-eslint/no-unnecessary-type-constraint": [2]
+  "@typescript-eslint/no-unsafe-argument": [0]
+  "@typescript-eslint/no-unsafe-assignment": [0]
+  "@typescript-eslint/no-unsafe-call": [0]
+  "@typescript-eslint/no-unsafe-declaration-merging": [2]
+  "@typescript-eslint/no-unsafe-enum-comparison": [2]
+  "@typescript-eslint/no-unsafe-member-access": [0]
+  "@typescript-eslint/no-unsafe-return": [0]
+  "@typescript-eslint/no-unsafe-unary-minus": [2]
+  "@typescript-eslint/no-unused-expressions": [0]
+  "@typescript-eslint/no-unused-vars": [2, {vars: all, args: all, caughtErrors: all, ignoreRestSiblings: false, argsIgnorePattern: ^_, varsIgnorePattern: ^_, caughtErrorsIgnorePattern: ^_, destructuredArrayIgnorePattern: ^_}]
+  "@typescript-eslint/no-use-before-define": [0]
+  "@typescript-eslint/no-useless-constructor": [0]
+  "@typescript-eslint/no-useless-empty-export": [0]
+  "@typescript-eslint/no-var-requires": [2]
+  "@typescript-eslint/non-nullable-type-assertion-style": [0]
+  "@typescript-eslint/only-throw-error": [2]
+  "@typescript-eslint/parameter-properties": [0]
+  "@typescript-eslint/prefer-as-const": [2]
+  "@typescript-eslint/prefer-destructuring": [0]
+  "@typescript-eslint/prefer-enum-initializers": [0]
+  "@typescript-eslint/prefer-find": [2]
+  "@typescript-eslint/prefer-for-of": [2]
+  "@typescript-eslint/prefer-function-type": [2]
+  "@typescript-eslint/prefer-includes": [2]
+  "@typescript-eslint/prefer-literal-enum-member": [0]
+  "@typescript-eslint/prefer-namespace-keyword": [0]
+  "@typescript-eslint/prefer-nullish-coalescing": [0]
+  "@typescript-eslint/prefer-optional-chain": [2, {requireNullish: true}]
+  "@typescript-eslint/prefer-promise-reject-errors": [0]
+  "@typescript-eslint/prefer-readonly": [0]
+  "@typescript-eslint/prefer-readonly-parameter-types": [0]
+  "@typescript-eslint/prefer-reduce-type-parameter": [0]
+  "@typescript-eslint/prefer-regexp-exec": [0]
+  "@typescript-eslint/prefer-return-this-type": [0]
+  "@typescript-eslint/prefer-string-starts-ends-with": [2, {allowSingleElementEquality: always}]
+  "@typescript-eslint/promise-function-async": [0]
+  "@typescript-eslint/require-array-sort-compare": [0]
+  "@typescript-eslint/require-await": [0]
+  "@typescript-eslint/restrict-plus-operands": [2]
+  "@typescript-eslint/restrict-template-expressions": [0]
+  "@typescript-eslint/return-await": [0]
+  "@typescript-eslint/strict-boolean-expressions": [0]
+  "@typescript-eslint/switch-exhaustiveness-check": [0]
+  "@typescript-eslint/triple-slash-reference": [2]
+  "@typescript-eslint/typedef": [0]
+  "@typescript-eslint/unbound-method": [2]
+  "@typescript-eslint/unified-signatures": [2]
  accessor-pairs: [2]
  array-callback-return: [2, {checkForEach: true}]
  array-func/avoid-reverse: [2]
@ -230,6 +350,7 @@ rules:
  default-case-last: [2]
  default-case: [0]
  default-param-last: [0]
+  deprecation/deprecation: [2]
  dot-notation: [0]
  eqeqeq: [2]
  for-direction: [2]
@ -321,7 +442,7 @@ rules:
  multiline-comment-style: [2, separate-lines]
  new-cap: [0]
  no-alert: [0]
-  no-array-constructor: [2]
+  no-array-constructor: [0] # handled by @typescript-eslint/no-array-constructor
  no-async-promise-executor: [0]
  no-await-in-loop: [0]
  no-bitwise: [0]
@ -365,7 +486,7 @@ rules:
  no-global-assign: [2]
  no-implicit-coercion: [2]
  no-implicit-globals: [0]
-  no-implied-eval: [2]
+  no-implied-eval: [0] # handled by @typescript-eslint/no-implied-eval
  no-import-assign: [2]
  no-inline-comments: [0]
  no-inner-declarations: [2]
@ -471,7 +592,7 @@ rules:
  no-lone-blocks: [2]
  no-lonely-if: [0]
  no-loop-func: [0]
-  no-loss-of-precision: [2]
+  no-loss-of-precision: [0] # handled by @typescript-eslint/no-loss-of-precision
  no-magic-numbers: [0]
  no-misleading-character-class: [2]
  no-multi-assign: [0]
@ -493,7 +614,7 @@ rules:
  no-promise-executor-return: [0]
  no-proto: [2]
  no-prototype-builtins: [2]
-  no-redeclare: [2]
+  no-redeclare: [0] # must be disabled for typescript overloads
  no-regex-spaces: [2]
  no-restricted-exports: [0]
  no-restricted-globals: [2, addEventListener, blur, close, closed, confirm, defaultStatus, defaultstatus, error, event, external, find, focus, frameElement, frames, history, innerHeight, innerWidth, isFinite, isNaN, length, location, locationbar, menubar, moveBy, moveTo, name, onblur, onerror, onfocus, onload, onresize, onunload, open, opener, opera, outerHeight, outerWidth, pageXOffset, pageYOffset, parent, print, removeEventListener, resizeBy, resizeTo, screen, screenLeft, screenTop, screenX, screenY, scroll, scrollbars, scrollBy, scrollTo, scrollX, scrollY, self, status, statusbar, stop, toolbar, top, __dirname, __filename]
@ -526,7 +647,7 @@ rules:
  no-unused-expressions: [2]
  no-unused-labels: [2]
  no-unused-private-class-members: [2]
-  no-unused-vars: [2, {args: all, argsIgnorePattern: ^_, varsIgnorePattern: ^_, caughtErrorsIgnorePattern: ^_, destructuredArrayIgnorePattern: ^_, ignoreRestSiblings: false}]
+  no-unused-vars: [0] # handled by @typescript-eslint/no-unused-vars
  no-use-before-define: [2, {functions: false, classes: true, variables: true, allowNamedExports: true}]
  no-use-extend-native/no-use-extend-native: [2]
  no-useless-backreference: [2]
@ -641,7 +762,7 @@ rules:
  regexp/unicode-escape: [0]
  regexp/use-ignore-case: [0]
  require-atomic-updates: [0]
-  require-await: [0]
+  require-await: [0] # handled by @typescript-eslint/require-await
  require-unicode-regexp: [0]
  require-yield: [2]
  sonarjs/cognitive-complexity: [0]
--- a/docs/content/contributing/guidelines-frontend.en-us.md
+++ b/docs/content/contributing/guidelines-frontend.en-us.md
@ -79,6 +79,22 @@ We use htmx for simple interactions. You can see an example for simple interacti
 Although mixing different frameworks is discouraged,
 it should also work if the mixing is necessary and the code is well-designed and maintainable.

+### Typescript
+
+Gitea is in the process of migrating to type-safe Typescript. Here are some specific guidelines regarding Typescript in the codebase:
+
+#### Use type aliases instead of interfaces
+
+Prefer to use type aliases because they can represent any type and are generally more flexible to use than interfaces.
+
+#### Use separate type imports
+
+We use `verbatimModuleSyntax` so type and non-type imports from the same file must be split into two `import type` statements. This enables the typescript compiler to completely eliminate the type import statements during compilation.
+
+#### Use `@ts-expect-error` instead of `@ts-ignore`
+
+Both annotations should be avoided, but if you have to use them, use `@ts-expect-error` because it will not leave ineffective statements after the issue is fixed.
+
 ### `async` Functions

 Only mark a function as `async` if and only if there are `await` calls
--- a/package-lock.json
+++ b/package-lock.json
@ -69,11 +69,13 @@
        "@stoplight/spectral-cli": "6.11.1",
        "@stylistic/eslint-plugin-js": "2.2.1",
        "@stylistic/stylelint-plugin": "2.1.2",
+        "@typescript-eslint/eslint-plugin": "7.14.1",
        "@typescript-eslint/parser": "7.14.1",
        "@vitejs/plugin-vue": "5.0.5",
        "eslint": "8.57.0",
        "eslint-import-resolver-typescript": "3.6.1",
        "eslint-plugin-array-func": "4.0.0",
+        "eslint-plugin-deprecation": "3.0.0",
        "eslint-plugin-github": "5.0.1",
        "eslint-plugin-i": "2.29.1",
        "eslint-plugin-no-jquery": "3.0.1",
@ -2370,16 +2372,17 @@
      "dev": true
    },
    "node_modules/@typescript-eslint/eslint-plugin": {
-      "version": "7.13.1",
-      "resolved": "https://registry.npmjs.org/@typescript-eslint/eslint-plugin/-/eslint-plugin-7.13.1.tgz",
-      "integrity": "sha512-kZqi+WZQaZfPKnsflLJQCz6Ze9FFSMfXrrIOcyargekQxG37ES7DJNpJUE9Q/X5n3yTIP/WPutVNzgknQ7biLg==",
+      "version": "7.14.1",
+      "resolved": "https://registry.npmjs.org/@typescript-eslint/eslint-plugin/-/eslint-plugin-7.14.1.tgz",
+      "integrity": "sha512-aAJd6bIf2vvQRjUG3ZkNXkmBpN+J7Wd0mfQiiVCJMu9Z5GcZZdcc0j8XwN/BM97Fl7e3SkTXODSk4VehUv7CGw==",
      "dev": true,
+      "license": "MIT",
      "dependencies": {
        "@eslint-community/regexpp": "^4.10.0",
-        "@typescript-eslint/scope-manager": "7.13.1",
-        "@typescript-eslint/type-utils": "7.13.1",
-        "@typescript-eslint/utils": "7.13.1",
-        "@typescript-eslint/visitor-keys": "7.13.1",
+        "@typescript-eslint/scope-manager": "7.14.1",
+        "@typescript-eslint/type-utils": "7.14.1",
+        "@typescript-eslint/utils": "7.14.1",
+        "@typescript-eslint/visitor-keys": "7.14.1",
        "graphemer": "^1.4.0",
        "ignore": "^5.3.1",
        "natural-compare": "^1.4.0",
@ -2431,7 +2434,7 @@
        }
      }
    },
-    "node_modules/@typescript-eslint/parser/node_modules/@typescript-eslint/scope-manager": {
+    "node_modules/@typescript-eslint/scope-manager": {
      "version": "7.14.1",
      "resolved": "https://registry.npmjs.org/@typescript-eslint/scope-manager/-/scope-manager-7.14.1.tgz",
      "integrity": "sha512-gPrFSsoYcsffYXTOZ+hT7fyJr95rdVe4kGVX1ps/dJ+DfmlnjFN/GcMxXcVkeHDKqsq6uAcVaQaIi3cFffmAbA==",
@ -2449,7 +2452,35 @@
        "url": "https://opencollective.com/typescript-eslint"
      }
    },
-    "node_modules/@typescript-eslint/parser/node_modules/@typescript-eslint/types": {
+    "node_modules/@typescript-eslint/type-utils": {
+      "version": "7.14.1",
+      "resolved": "https://registry.npmjs.org/@typescript-eslint/type-utils/-/type-utils-7.14.1.tgz",
+      "integrity": "sha512-/MzmgNd3nnbDbOi3LfasXWWe292+iuo+umJ0bCCMCPc1jLO/z2BQmWUUUXvXLbrQey/JgzdF/OV+I5bzEGwJkQ==",
+      "dev": true,
+      "license": "MIT",
+      "dependencies": {
+        "@typescript-eslint/typescript-estree": "7.14.1",
+        "@typescript-eslint/utils": "7.14.1",
+        "debug": "^4.3.4",
+        "ts-api-utils": "^1.3.0"
+      },
+      "engines": {
+        "node": "^18.18.0 || >=20.0.0"
+      },
+      "funding": {
+        "type": "opencollective",
+        "url": "https://opencollective.com/typescript-eslint"
+      },
+      "peerDependencies": {
+        "eslint": "^8.56.0"
+      },
+      "peerDependenciesMeta": {
+        "typescript": {
+          "optional": true
+        }
+      }
+    },
+    "node_modules/@typescript-eslint/types": {
      "version": "7.14.1",
      "resolved": "https://registry.npmjs.org/@typescript-eslint/types/-/types-7.14.1.tgz",
      "integrity": "sha512-mL7zNEOQybo5R3AavY+Am7KLv8BorIv7HCYS5rKoNZKQD9tsfGUpO4KdAn3sSUvTiS4PQkr2+K0KJbxj8H9NDg==",
@ -2463,7 +2494,7 @@
        "url": "https://opencollective.com/typescript-eslint"
      }
    },
-    "node_modules/@typescript-eslint/parser/node_modules/@typescript-eslint/typescript-estree": {
+    "node_modules/@typescript-eslint/typescript-estree": {
      "version": "7.14.1",
      "resolved": "https://registry.npmjs.org/@typescript-eslint/typescript-estree/-/typescript-estree-7.14.1.tgz",
      "integrity": "sha512-k5d0VuxViE2ulIO6FbxxSZaxqDVUyMbXcidC8rHvii0I56XZPv8cq+EhMns+d/EVIL41sMXqRbK3D10Oza1bbA==",
@ -2492,7 +2523,30 @@
        }
      }
    },
-    "node_modules/@typescript-eslint/parser/node_modules/@typescript-eslint/visitor-keys": {
+    "node_modules/@typescript-eslint/utils": {
+      "version": "7.14.1",
+      "resolved": "https://registry.npmjs.org/@typescript-eslint/utils/-/utils-7.14.1.tgz",
+      "integrity": "sha512-CMmVVELns3nak3cpJhZosDkm63n+DwBlDX8g0k4QUa9BMnF+lH2lr3d130M1Zt1xxmB3LLk3NV7KQCq86ZBBhQ==",
+      "dev": true,
+      "license": "MIT",
+      "dependencies": {
+        "@eslint-community/eslint-utils": "^4.4.0",
+        "@typescript-eslint/scope-manager": "7.14.1",
+        "@typescript-eslint/types": "7.14.1",
+        "@typescript-eslint/typescript-estree": "7.14.1"
+      },
+      "engines": {
+        "node": "^18.18.0 || >=20.0.0"
+      },
+      "funding": {
+        "type": "opencollective",
+        "url": "https://opencollective.com/typescript-eslint"
+      },
+      "peerDependencies": {
+        "eslint": "^8.56.0"
+      }
+    },
+    "node_modules/@typescript-eslint/visitor-keys": {
      "version": "7.14.1",
      "resolved": "https://registry.npmjs.org/@typescript-eslint/visitor-keys/-/visitor-keys-7.14.1.tgz",
      "integrity": "sha512-Crb+F75U1JAEtBeQGxSKwI60hZmmzaqA3z9sYsVm8X7W5cwLEm5bRe0/uXS6+MR/y8CVpKSR/ontIAIEPFcEkA==",
@ -2510,148 +2564,12 @@
        "url": "https://opencollective.com/typescript-eslint"
      }
    },
-    "node_modules/@typescript-eslint/parser/node_modules/eslint-visitor-keys": {
-      "version": "3.4.3",
-      "resolved": "https://registry.npmjs.org/eslint-visitor-keys/-/eslint-visitor-keys-3.4.3.tgz",
-      "integrity": "sha512-wpc+LXeiyiisxPlEkUzU6svyS1frIO3Mgxj1fdy7Pm8Ygzguax2N3Fa/D/ag1WqbOprdI+uY6wMUl8/a2G+iag==",
-      "dev": true,
-      "license": "Apache-2.0",
-      "engines": {
-        "node": "^12.22.0 || ^14.17.0 || >=16.0.0"
-      },
-      "funding": {
-        "url": "https://opencollective.com/eslint"
-      }
-    },
-    "node_modules/@typescript-eslint/scope-manager": {
-      "version": "7.13.1",
-      "resolved": "https://registry.npmjs.org/@typescript-eslint/scope-manager/-/scope-manager-7.13.1.tgz",
-      "integrity": "sha512-adbXNVEs6GmbzaCpymHQ0MB6E4TqoiVbC0iqG3uijR8ZYfpAXMGttouQzF4Oat3P2GxDVIrg7bMI/P65LiQZdg==",
-      "dev": true,
-      "dependencies": {
-        "@typescript-eslint/types": "7.13.1",
-        "@typescript-eslint/visitor-keys": "7.13.1"
-      },
-      "engines": {
-        "node": "^18.18.0 || >=20.0.0"
-      },
-      "funding": {
-        "type": "opencollective",
-        "url": "https://opencollective.com/typescript-eslint"
-      }
-    },
-    "node_modules/@typescript-eslint/type-utils": {
-      "version": "7.13.1",
-      "resolved": "https://registry.npmjs.org/@typescript-eslint/type-utils/-/type-utils-7.13.1.tgz",
-      "integrity": "sha512-aWDbLu1s9bmgPGXSzNCxELu+0+HQOapV/y+60gPXafR8e2g1Bifxzevaa+4L2ytCWm+CHqpELq4CSoN9ELiwCg==",
-      "dev": true,
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-        "url": "https://opencollective.com/typescript-eslint"
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-    "node_modules/@typescript-eslint/typescript-estree": {
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-        "debug": "^4.3.4",
-        "globby": "^11.1.0",
-        "is-glob": "^4.0.3",
-        "minimatch": "^9.0.4",
-        "semver": "^7.6.0",
-        "ts-api-utils": "^1.3.0"
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-        "url": "https://opencollective.com/typescript-eslint"
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-      "dev": true,
-      "dependencies": {
-        "@eslint-community/eslint-utils": "^4.4.0",
-        "@typescript-eslint/scope-manager": "7.13.1",
-        "@typescript-eslint/types": "7.13.1",
-        "@typescript-eslint/typescript-estree": "7.13.1"
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-        "url": "https://opencollective.com/typescript-eslint"
-      },
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-      }
-    },
-    "node_modules/@typescript-eslint/visitor-keys": {
-      "version": "7.13.1",
-      "resolved": "https://registry.npmjs.org/@typescript-eslint/visitor-keys/-/visitor-keys-7.13.1.tgz",
-      "integrity": "sha512-k/Bfne7lrP7hcb7m9zSsgcBmo+8eicqqfNAJ7uUY+jkTFpKeH2FSkWpFRtimBxgkyvqfu9jTPRbYOvud6isdXA==",
-      "dev": true,
-      "dependencies": {
-        "@typescript-eslint/types": "7.13.1",
-        "eslint-visitor-keys": "^3.4.3"
-      },
-      "engines": {
-        "node": "^18.18.0 || >=20.0.0"
-      },
-      "funding": {
-        "type": "opencollective",
-        "url": "https://opencollective.com/typescript-eslint"
-      }
-    },
    "node_modules/@typescript-eslint/visitor-keys/node_modules/eslint-visitor-keys": {
      "version": "3.4.3",
      "resolved": "https://registry.npmjs.org/eslint-visitor-keys/-/eslint-visitor-keys-3.4.3.tgz",
      "integrity": "sha512-wpc+LXeiyiisxPlEkUzU6svyS1frIO3Mgxj1fdy7Pm8Ygzguax2N3Fa/D/ag1WqbOprdI+uY6wMUl8/a2G+iag==",
      "dev": true,
+      "license": "Apache-2.0",
      "engines": {
        "node": "^12.22.0 || ^14.17.0 || >=16.0.0"
      },
@ -5513,6 +5431,22 @@
        "eslint": ">=8.40.0"
      }
    },
+    "node_modules/eslint-plugin-deprecation": {
+      "version": "3.0.0",
+      "resolved": "https://registry.npmjs.org/eslint-plugin-deprecation/-/eslint-plugin-deprecation-3.0.0.tgz",
+      "integrity": "sha512-JuVLdNg/uf0Adjg2tpTyYoYaMbwQNn/c78P1HcccokvhtRphgnRjZDKmhlxbxYptppex03zO76f97DD/yQHv7A==",
+      "dev": true,
+      "license": "LGPL-3.0-or-later",
+      "dependencies": {
+        "@typescript-eslint/utils": "^7.0.0",
+        "ts-api-utils": "^1.3.0",
+        "tslib": "^2.3.1"
+      },
+      "peerDependencies": {
+        "eslint": "^8.0.0",
+        "typescript": "^4.2.4 || ^5.0.0"
+      }
+    },
    "node_modules/eslint-plugin-escompat": {
      "version": "3.4.0",
      "resolved": "https://registry.npmjs.org/eslint-plugin-escompat/-/eslint-plugin-escompat-3.4.0.tgz",
--- a/package.json
+++ b/package.json
@ -68,11 +68,13 @@
    "@stoplight/spectral-cli": "6.11.1",
    "@stylistic/eslint-plugin-js": "2.2.1",
    "@stylistic/stylelint-plugin": "2.1.2",
+    "@typescript-eslint/eslint-plugin": "7.14.1",
    "@typescript-eslint/parser": "7.14.1",
    "@vitejs/plugin-vue": "5.0.5",
    "eslint": "8.57.0",
    "eslint-import-resolver-typescript": "3.6.1",
    "eslint-plugin-array-func": "4.0.0",
+    "eslint-plugin-deprecation": "3.0.0",
    "eslint-plugin-github": "5.0.1",
    "eslint-plugin-i": "2.29.1",
    "eslint-plugin-no-jquery": "3.0.1",
--- a/tests/e2e/example.test.e2e.ts
+++ b/tests/e2e/example.test.e2e.ts
@ -7,21 +7,21 @@ test.beforeAll(async ({browser}, workerInfo) => {

 test('homepage', async ({page}) => {
  const response = await page.goto('/');
-  await expect(response?.status()).toBe(200); // Status OK
+  expect(response?.status()).toBe(200); // Status OK
  await expect(page).toHaveTitle(/^Gitea: Git with a cup of tea\s*$/);
  await expect(page.locator('.logo')).toHaveAttribute('src', '/assets/img/logo.svg');
 });

 test('register', async ({page}, workerInfo) => {
  const response = await page.goto('/user/sign_up');
-  await expect(response?.status()).toBe(200); // Status OK
-  await page.type('input[name=user_name]', `e2e-test-${workerInfo.workerIndex}`);
-  await page.type('input[name=email]', `e2e-test-${workerInfo.workerIndex}@test.com`);
-  await page.type('input[name=password]', 'test123test123');
-  await page.type('input[name=retype]', 'test123test123');
+  expect(response?.status()).toBe(200); // Status OK
+  await page.locator('input[name=user_name]').fill(`e2e-test-${workerInfo.workerIndex}`);
+  await page.locator('input[name=email]').fill(`e2e-test-${workerInfo.workerIndex}@test.com`);
+  await page.locator('input[name=password]').fill('test123test123');
+  await page.locator('input[name=retype]').fill('test123test123');
  await page.click('form button.ui.primary.button:visible');
  // Make sure we routed to the home page. Else login failed.
-  await expect(page.url()).toBe(`${workerInfo.project.use.baseURL}/`);
+  expect(page.url()).toBe(`${workerInfo.project.use.baseURL}/`);
  await expect(page.locator('.secondary-nav span>img.ui.avatar')).toBeVisible();
  await expect(page.locator('.ui.positive.message.flash-success')).toHaveText('Account was successfully created. Welcome!');

@ -30,15 +30,15 @@ test('register', async ({page}, workerInfo) => {

 test('login', async ({page}, workerInfo) => {
  const response = await page.goto('/user/login');
-  await expect(response?.status()).toBe(200); // Status OK
+  expect(response?.status()).toBe(200); // Status OK

-  await page.type('input[name=user_name]', `user2`);
-  await page.type('input[name=password]', `password`);
+  await page.locator('input[name=user_name]').fill(`user2`);
+  await page.locator('input[name=password]').fill(`password`);
  await page.click('form button.ui.primary.button:visible');

  await page.waitForLoadState('networkidle'); // eslint-disable-line playwright/no-networkidle

-  await expect(page.url()).toBe(`${workerInfo.project.use.baseURL}/`);
+  expect(page.url()).toBe(`${workerInfo.project.use.baseURL}/`);

  save_visual(page);
 });
@ -50,7 +50,7 @@ test('logged in user', async ({browser}, workerInfo) => {
  await page.goto('/');

  // Make sure we routed to the home page. Else login failed.
-  await expect(page.url()).toBe(`${workerInfo.project.use.baseURL}/`);
+  expect(page.url()).toBe(`${workerInfo.project.use.baseURL}/`);

  save_visual(page);
 });
--- a/tests/e2e/utils_e2e.ts
+++ b/tests/e2e/utils_e2e.ts
@ -14,7 +14,7 @@ export async function login_user(browser, workerInfo, user) {
  // Route to login page
  // Note: this could probably be done more quickly with a POST
  const response = await page.goto('/user/login');
-  await expect(response?.status()).toBe(200); // Status OK
+  expect(response?.status()).toBe(200); // Status OK

  // Fill out form
  await page.type('input[name=user_name]', user);
@ -23,7 +23,7 @@ export async function login_user(browser, workerInfo, user) {

  await page.waitForLoadState('networkidle'); // eslint-disable-line playwright/no-networkidle

-  await expect(page.url(), {message: `Failed to login user ${user}`}).toBe(`${workerInfo.project.use.baseURL}/`);
+  expect(page.url(), {message: `Failed to login user ${user}`}).toBe(`${workerInfo.project.use.baseURL}/`);

  // Save state
  await context.storageState({path: `${ARTIFACTS_PATH}/state-${user}-${workerInfo.workerIndex}.json`});
--- a/web_src/js/components/RepoActionView.vue
+++ b/web_src/js/components/RepoActionView.vue
@ -89,7 +89,9 @@ const sfc = {
    // load job data and then auto-reload periodically
    // need to await first loadJob so this.currentJobStepsStates is initialized and can be used in hashChangeListener
    await this.loadJob();
-    this.intervalID = setInterval(this.loadJob, 1000);
+    this.intervalID = setInterval(() => {
+      this.loadJob();
+    }, 1000);
    document.body.addEventListener('click', this.closeDropdown);
    this.hashChangeListener();
    window.addEventListener('hashchange', this.hashChangeListener);
--- a/web_src/js/features/repo-code.js
+++ b/web_src/js/features/repo-code.js
@ -153,7 +153,7 @@ export function initRepoCodeView() {
    });

    $(window).on('hashchange', () => {
-      let m = rangeAnchorRegex.exec(window.location.hash.match);
+      let m = rangeAnchorRegex.exec(window.location.hash);
      const $linesEls = $(getLineEls());
      let $first;
      if (m) {
@ -170,7 +170,7 @@ export function initRepoCodeView() {
          return;
        }
      }
-      m = singleAnchorRegex.exec(window.location.hash.match);
+      m = singleAnchorRegex.exec(window.location.hash);
      if (m) {
        $first = $linesEls.filter(`[rel=L${m[2]}]`);
        if ($first.length) {
--- a/web_src/js/features/repo-findfile.js
+++ b/web_src/js/features/repo-findfile.js
@ -55,8 +55,8 @@ export function filterRepoFilesWeighted(files, filter) {
    const filterLower = filter.toLowerCase();
    // TODO: for large repo, this loop could be slow, maybe there could be one more limit:
    // ... && filterResult.length < threshold * 20,  wait for more feedbacks
-    for (let i = 0; i < files.length; i++) {
-      const res = strSubMatch(files[i], filterLower);
+    for (const file of files) {
+      const res = strSubMatch(file, filterLower);
      if (res.length > 1) { // length==1 means unmatched, >1 means having matched sub strings
        filterResult.push({matchResult: res, matchWeight: calcMatchedWeight(res)});
      }
--- a/web_src/js/features/repo-home.js
+++ b/web_src/js/features/repo-home.js
@ -102,16 +102,16 @@ export function initRepoTopicBar() {

        if (res.topics) {
          let found = false;
-          for (let i = 0; i < res.topics.length; i++) {
+          for (const {topic_name} of res.topics) {
            // skip currently added tags
-            if (current_topics.includes(res.topics[i].topic_name)) {
+            if (current_topics.includes(topic_name)) {
              continue;
            }

-            if (res.topics[i].topic_name.toLowerCase() === query.toLowerCase()) {
+            if (topic_name.toLowerCase() === query.toLowerCase()) {
              found_query = true;
            }
-            formattedResponse.results.push({description: res.topics[i].topic_name, 'data-value': res.topics[i].topic_name});
+            formattedResponse.results.push({description: topic_name, 'data-value': topic_name});
            found = true;
          }
          formattedResponse.success = found;
--- a/web_src/js/utils/dom.js
+++ b/web_src/js/utils/dom.js
@ -270,7 +270,7 @@ export function replaceTextareaSelection(textarea, text) {

  textarea.contentEditable = 'true';
  try {
-    success = document.execCommand('insertText', false, text);
+    success = document.execCommand('insertText', false, text); // eslint-disable-line deprecation/deprecation
  } catch {
    success = false;
  }