Merge remote-tracking branch 'origin/main' into dont-widen-computed-prop-wiht-patterns

# Conflicts:
#	tests/baselines/reference/indexSignatures1.types

Author: Andarist

Diff for: .dprint.jsonc

@@ -19,17 +19,17 @@
         "arrowFunction.useParentheses": "preferNone",
         "conditionalExpression.linePerExpression": false, // Keep our "match/case"-ish conditionals.
         "functionExpression.spaceAfterFunctionKeyword": true,
-        "importDeclaration.forceMultiLine": true,
+        "importDeclaration.forceMultiLine": "whenMultiple",
         "constructorType.spaceAfterNewKeyword": true,
         "constructSignature.spaceAfterNewKeyword": true,
 
-        // Let eslint-plugin-simple-import-sort handle this.
-        "module.sortImportDeclarations": "maintain",
-        "module.sortExportDeclarations": "maintain",
-        "exportDeclaration.sortNamedExports": "maintain",
-        "importDeclaration.sortNamedImports": "maintain"
+        "module.sortImportDeclarations": "caseInsensitive",
+        "module.sortExportDeclarations": "caseInsensitive",
+        "exportDeclaration.sortNamedExports": "caseInsensitive",
+        "importDeclaration.sortNamedImports": "caseInsensitive"
     },
     "prettier": {
+        "newLineKind": "lf",
         "associations": [
             "**/*.{yaml,yml}"
         ],
@@ -43,6 +43,7 @@
         "trailingCommas": "never"
     },
     "excludes": [
+        "**/.git",
         "**/node_modules",
         "**/*-lock.json",
         "coverage/**",
@@ -51,12 +52,13 @@
         "tests/**",
         "internal/**",
         "**/*.generated.*",
-        "scripts/*.d.*"
+        "scripts/*.d.*",
+        "**/_namespaces/**"
     ],
     // Note: if adding new languages, make sure settings.template.json is updated too.
     "plugins": [
-        "https://plugins.dprint.dev/typescript-0.88.3.wasm",
-        "https://plugins.dprint.dev/json-0.19.0.wasm",
-        "https://plugins.dprint.dev/prettier-0.27.0.json@3557a62b4507c55a47d8cde0683195b14d13c41dda66d0f0b0e111aed107e2fe"
+        "https://plugins.dprint.dev/typescript-0.90.0.wasm",
+        "https://plugins.dprint.dev/json-0.19.2.wasm",
+        "https://plugins.dprint.dev/prettier-0.39.0.json@896b70f29ef8213c1b0ba81a93cee9c2d4f39ac2194040313cd433906db7bc7c"
     ]
 }

Diff for: .eslintplugin.js renamed to .eslint-plugin-local.cjs

@@ -17,9 +17,7 @@
     ],
     "plugins": [
         "@typescript-eslint",
-        "no-null",
-        "eslint-plugin-local",
-        "simple-import-sort"
+        "eslint-plugin-local"
     ],
     "ignorePatterns": [
         "**/node_modules/**",
@@ -61,6 +59,18 @@
         "prefer-object-spread": "error",
         "unicode-bom": ["error", "never"],
 
+        "no-restricted-syntax": [
+            "error",
+            {
+                "selector": "Literal[raw=null]",
+                "message": "Avoid using null; use undefined instead."
+            },
+            {
+                "selector": "TSNullKeyword",
+                "message": "Avoid using null; use undefined instead."
+            }
+        ],
+
         // Enabled in eslint:recommended, but not applicable here
         "no-extra-boolean-cast": "off",
         "no-case-declarations": "off",
@@ -82,6 +92,10 @@
             { "selector": "property", "format": null }
         ],
 
+        "@typescript-eslint/unified-signatures": "error",
+        "no-unused-expressions": "off",
+        "@typescript-eslint/no-unused-expressions": ["error", { "allowTernary": true }],
+
         // Rules enabled in typescript-eslint configs that are not applicable here
         "@typescript-eslint/ban-ts-comment": "off",
         "@typescript-eslint/class-literal-property-style": "off",
@@ -105,9 +119,15 @@
                 }
             }
         ],
-
-        // Todo: For each of these, investigate whether we want to enable them ✨
-        "@typescript-eslint/no-unused-vars": "off",
+        "@typescript-eslint/no-unused-vars": [
+            "warn",
+            {
+                // Ignore: (solely underscores | starting with exactly one underscore)
+                "argsIgnorePattern": "^(_+$|_[^_])",
+                "varsIgnorePattern": "^(_+$|_[^_])"
+            }
+        ],
+        "@typescript-eslint/no-inferrable-types": "off",
 
         // Pending https://github.com/typescript-eslint/typescript-eslint/issues/4820
         "@typescript-eslint/prefer-optional-chain": "off",
@@ -124,14 +144,7 @@
         "local/no-in-operator": "error",
         "local/debug-assert": "error",
         "local/no-keywords": "error",
-        "local/jsdoc-format": "error",
-
-        // eslint-plugin-no-null
-        "no-null/no-null": "error",
-
-        // eslint-plugin-simple-import-sort
-        "simple-import-sort/imports": "error",
-        "simple-import-sort/exports": "error"
+        "local/jsdoc-format": "error"
     },
     "overrides": [
         // By default, the ESLint CLI only looks at .js files. But, it will also look at
@@ -158,14 +171,6 @@
                     { "name": "exports" }
                 ]
             }
-        },
-        {
-            // These files contain imports in a specific order that are generally unsafe to modify.
-            "files": ["**/_namespaces/**"],
-            "rules": {
-                "simple-import-sort/imports": "off",
-                "simple-import-sort/exports": "off"
-            }
         }
     ]
 }

Diff for: .eslintrc.json

@@ -3,7 +3,10 @@ description: 'Create a report to help us improve TypeScript'
 body:
   - type: markdown
     attributes:
-      value: Please fill in each section completely. Thank you!
+      value: |
+        🔍 Please [search thoroughly in GitHub](https://github.com/Microsoft/TypeScript/search?type=Issues) or by the query `site:github.com/microsoft/TypeScript <your keywords>` in your favorite search engine before reporting a new bug as most bugs are very likely to find precedents.
+
+        Please fill in each section completely. Thank you!
   - type: textarea
     id: search_terms
     attributes:

Diff for: .github/ISSUE_TEMPLATE/bug_report.yml

@@ -1,15 +1,15 @@
----
-blank_issues_enabled: false
-contact_links:
-  - about: 'Please ask and answer usage questions on Stack Overflow.'
-    name: Question
-    url: 'https://stackoverflow.com/questions/tagged/typescript'
-  - about: 'Alternatively, you can use the TypeScript Community Discord.'
-    name: Chat
-    url: 'https://discord.gg/typescript'
-  - about: 'Please check the FAQ before filing new issues'
-    name: 'TypeScript FAQ'
-    url: 'https://github.com/microsoft/TypeScript/wiki/FAQ'
-  - about: 'Please raise issues about the site on its own repo.'
-    name: Website
-    url: 'https://github.com/microsoft/TypeScript-Website/issues/new'
+---
+blank_issues_enabled: false
+contact_links:
+  - about: 'Please ask and answer usage questions on Stack Overflow.'
+    name: Question
+    url: 'https://stackoverflow.com/questions/tagged/typescript'
+  - about: 'Alternatively, you can use the TypeScript Community Discord.'
+    name: Chat
+    url: 'https://discord.gg/typescript'
+  - about: 'Please check the FAQ before filing new issues'
+    name: 'TypeScript FAQ'
+    url: 'https://github.com/microsoft/TypeScript/wiki/FAQ'
+  - about: 'Please raise issues about the site on its own repo.'
+    name: Website
+    url: 'https://github.com/microsoft/TypeScript-Website/issues/new'

Diff for: .github/ISSUE_TEMPLATE/config.yml

@@ -3,17 +3,22 @@ description: 'Suggest an idea'
 body:
   - type: markdown
     attributes:
-      value: 'Please fill in each section completely. Thank you!'
+      value: |
+        💡 Did you know? TypeScript has over 2,000 open suggestions!
+
+        🔎 Please [search thoroughly in GitHub](https://github.com/Microsoft/TypeScript/search?type=Issues) or by the query `site:github.com/microsoft/TypeScript <your keywords>` in your favorite search engine before logging new feature requests as most common ideas already have a proposal in progress.
+
+        The "Common Feature Requests" section of the FAQ lists many popular requests: https://github.com/Microsoft/TypeScript/wiki/FAQ#common-feature-requests
+
+        Please fill in each section completely. Thank you!
   - type: textarea
     id: search_terms
     attributes:
       label: '🔍 Search Terms'
       description: |
-        💡 Did you know? TypeScript has over 2,000 open suggestions!
+        What search terms did you use when trying to find an existing suggestion?
 
-        🔎 Please search thoroughly before logging new feature requests as most common ideas already have a proposal in progress.
-
-        The "Common Feature Requests" section of the FAQ lists many popular requests: https://github.com/Microsoft/TypeScript/wiki/FAQ#common-feature-requests
+        List them here so people in the future can find this one more easily.
       placeholder: |
         List of keywords you searched for before creating this issue. Write them down here so that others can find this suggestion more easily and help provide feedback.
 

Diff for: .github/ISSUE_TEMPLATE/feature_request.yml

@@ -1,5 +1,5 @@
 name: 'Library change'
-description: 'Fix or improve issues with built-in type definitions like `lib.dom.d.ts`, `lib.es6.d.ts`, etc.'
+description: 'Fix or improve issues with built-in type definitions like `lib.es6.d.ts`, etc.'
 body:
   - type: markdown
     attributes:

Diff for: .github/ISSUE_TEMPLATE/lib_change.yml

@@ -17,10 +17,12 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-      - uses: actions/checkout@b4ffde65f46336ab88eb53be808477a3936bae11 # v4.1.1
+      - uses: actions/checkout@0ad4b8fadaa221de15dcec353f45205ec38ea70b # v4.1.4
         with:
           token: ${{ secrets.TS_BOT_GITHUB_TOKEN }}
-      - uses: actions/setup-node@8f152de45cc393bb48ce5d89d36b731f54556e65 # v4.0.0
+      - uses: actions/setup-node@60edb5dd545a775178f52524783378180af0d1f8 # v4.0.2
+        with:
+          node-version: 'lts/*'
 
       - name: Configure Git, Run Tests, Update Baselines, Apply Fixes
         run: |