fix: resolve TypeScript errors in frontend build

node_modules/prosemirror-keymap/.tern-project

@@ -0,0 +1,8 @@
+{
+  "libs": ["browser"],
+  "plugins": {
+    "node": {},
+    "complete_strings": {},
+    "es_modules": {}
+  }
+}

node_modules/prosemirror-keymap/CHANGELOG.md

@@ -0,0 +1,104 @@
+## 1.2.3 (2025-05-04)
+
+### Bug fixes
+
+Fix an issue where the library was too eager to dispatch keys by key code when the character produced isn't ASCII.
+
+## 1.2.2 (2023-05-17)
+
+### Bug fixes
+
+Include CommonJS type declarations in the package to please new TypeScript resolution settings.
+
+## 1.2.1 (2023-02-14)
+
+### Bug fixes
+
+Work around macOS putting the unmodified character in `KeyboardEvent.key` when Cmd is held down, fixing shift-cmd-letter bindings.
+
+## 1.2.0 (2022-05-30)
+
+### New features
+
+Include TypeScript type declarations.
+
+## 1.1.5 (2021-10-29)
+
+### Bug fixes
+
+Fix issue where iPhones and iPads with a hardware keyboard didn't have Mod converted to Cmd.
+
+## 1.1.4 (2020-05-18)
+
+### Bug fixes
+
+Fall through to the name associated with a key's `keyCode` when the character produced isn't ASCII and isn't directly bound.
+
+## 1.1.3 (2019-11-20)
+
+### Bug fixes
+
+Rename ES module files to use a .js extension, since Webpack gets confused by .mjs
+
+## 1.1.2 (2019-11-19)
+
+### Bug fixes
+
+The file referred to in the package's `module` field now is compiled down to ES5.
+
+## 1.1.1 (2019-11-15)
+
+### Bug fixes
+
+Fix an issue where keyboards layouts that use shift to produce characters that are created without shift on a US keyboard would fail to fire bindings for those keys that include the Shift- modifier.
+
+## 1.1.0 (2019-11-08)
+
+### New features
+
+Add a `module` field to package json file.
+
+## 1.0.2 (2019-10-16)
+
+### Bug fixes
+
+Upgrade w3c-keyname package dependency.
+
+## 1.0.1 (2018-02-23)
+
+### Bug fixes
+
+Upgrade `w3c-keyname` dependency to version 1.1.8 to prevent users getting stuck with a buggy version.
+
+## 0.22.1 (2017-07-14)
+
+### Bug fixes
+
+Bindings like Alt-3 should now fire even if your keyboard produces a special character for that combination.
+
+## 0.18.0 (2017-02-24)
+
+### New features
+
+Add a [`keydownHandler`](https://prosemirror.net/docs/ref/version/0.18.0.html#keymap.keydownHandler) function, which takes a keymap and produces a [`handleKeydown` prop](https://prosemirror.net/docs/ref/version/0.18.0.html#view.EditorProps.handleKeydown)-style function.
+
+## 0.12.0 (2016-10-21)
+
+### Breaking changes
+
+Key names are now based on
+[`KeyboardEvent.key`](https://developer.mozilla.org/en-US/docs/Web/API/KeyboardEvent/key)
+instead of
+[`.code`](https://developer.mozilla.org/en-US/docs/Web/API/KeyboardEvent/code).
+This means that, for character-producing keys, you'll want to use the
+character typed, not the key name. So `Ctrl-Z` now means uppercase Z,
+and you'll usually want `Ctrl-z` instead. Single-quoted key names are
+no longer supported.
+
+## 0.11.0 (2016-09-21)
+
+### Breaking changes
+
+New module, takes the same role as the old built-in keymap support in
+the `ProseMirror` class.
+

node_modules/prosemirror-keymap/CONTRIBUTING.md

@@ -0,0 +1,104 @@
+# How to contribute
+
+- [Getting help](#getting-help)
+- [Submitting bug reports](#submitting-bug-reports)
+- [Contributing code](#contributing-code)
+
+## Getting help
+
+Community discussion, questions, and informal bug reporting is done on the
+[discuss.ProseMirror forum](http://discuss.prosemirror.net).
+
+## Submitting bug reports
+
+Report bugs on the
+[GitHub issue tracker](http://github.com/prosemirror/prosemirror/issues).
+Before reporting a bug, please read these pointers.
+
+- The issue tracker is for *bugs*, not requests for help. Questions
+  should be asked on the [forum](http://discuss.prosemirror.net).
+
+- Include information about the version of the code that exhibits the
+  problem. For browser-related issues, include the browser and browser
+  version on which the problem occurred.
+
+- Mention very precisely what went wrong. "X is broken" is not a good
+  bug report. What did you expect to happen? What happened instead?
+  Describe the exact steps a maintainer has to take to make the
+  problem occur. A screencast can be useful, but is no substitute for
+  a textual description.
+
+- A great way to make it easy to reproduce your problem, if it can not
+  be trivially reproduced on the website demos, is to submit a script
+  that triggers the issue.
+
+## Contributing code
+
+If you want to make a change that involves a significant overhaul of
+the code or introduces a user-visible new feature, create an
+[RFC](https://github.com/ProseMirror/rfcs/) first with your proposal.
+
+- Make sure you have a [GitHub Account](https://github.com/signup/free)
+
+- Fork the relevant repository
+  ([how to fork a repo](https://help.github.com/articles/fork-a-repo))
+
+- Create a local checkout of the code. You can use the
+  [main repository](https://github.com/prosemirror/prosemirror) to
+  easily check out all core modules.
+
+- Make your changes, and commit them
+
+- Follow the code style of the rest of the project (see below). Run
+  `npm run lint` (in the main repository checkout) to make sure that
+  the linter is happy.
+
+- If your changes are easy to test or likely to regress, add tests in
+  the relevant `test/` directory. Either put them in an existing
+  `test-*.js` file, if they fit there, or add a new file.
+
+- Make sure all tests pass. Run `npm run test` to verify tests pass
+  (you will need Node.js v6+).
+
+- Submit a pull request ([how to create a pull request](https://help.github.com/articles/fork-a-repo)).
+  Don't put more than one feature/fix in a single pull request.
+
+By contributing code to ProseMirror you
+
+ - Agree to license the contributed code under the project's [MIT
+   license](https://github.com/ProseMirror/prosemirror/blob/master/LICENSE).
+
+ - Confirm that you have the right to contribute and license the code
+   in question. (Either you hold all rights on the code, or the rights
+   holder has explicitly granted the right to use it like this,
+   through a compatible open source license or through a direct
+   agreement with you.)
+
+### Coding standards
+
+- ES6 syntax, targeting an ES5 runtime (i.e. don't use library
+  elements added by ES6, don't use ES7/ES.next syntax).
+
+- 2 spaces per indentation level, no tabs.
+
+- No semicolons except when necessary.
+
+- Follow the surrounding code when it comes to spacing, brace
+  placement, etc.
+
+- Brace-less single-statement bodies are encouraged (whenever they
+  don't impact readability).
+
+- [getdocs](https://github.com/marijnh/getdocs)-style doc comments
+  above items that are part of the public API.
+
+- When documenting non-public items, you can put the type after a
+  single colon, so that getdocs doesn't pick it up and add it to the
+  API reference.
+
+- The linter (`npm run lint`) complains about unused variables and
+  functions. Prefix their names with an underscore to muffle it.
+
+- ProseMirror does *not* follow JSHint or JSLint prescribed style.
+  Patches that try to 'fix' code to pass one of these linters will not
+  be accepted.

node_modules/prosemirror-keymap/LICENSE

@@ -0,0 +1,19 @@
+Copyright (C) 2015-2017 by Marijn Haverbeke <marijn@haverbeke.berlin> and others
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.

node_modules/prosemirror-keymap/README.md

@@ -0,0 +1,27 @@
+# prosemirror-keymap
+
+[ [**WEBSITE**](https://prosemirror.net) | [**ISSUES**](https://github.com/prosemirror/prosemirror/issues) | [**FORUM**](https://discuss.prosemirror.net) | [**CHANGELOG**](https://github.com/ProseMirror/prosemirror-keymap/blob/master/CHANGELOG.md) ]
+
+This is a [core module](https://prosemirror.net/docs/ref/#keymap) of [ProseMirror](https://prosemirror.net).
+ProseMirror is a well-behaved rich semantic content editor based on
+contentEditable, with support for collaborative editing and custom
+document schemas.
+
+This [module](https://prosemirror.net/docs/ref/#keymap) implements a
+plugin for conveniently defining key bindings.
+
+The [project page](https://prosemirror.net) has more information, a
+number of [examples](https://prosemirror.net/examples/) and the
+[documentation](https://prosemirror.net/docs/).
+
+This code is released under an
+[MIT license](https://github.com/prosemirror/prosemirror/tree/master/LICENSE).
+There's a [forum](http://discuss.prosemirror.net) for general
+discussion and support requests, and the
+[Github bug tracker](https://github.com/prosemirror/prosemirror/issues)
+is the place to report issues.
+
+We aim to be an inclusive, welcoming community. To make that explicit,
+we have a [code of
+conduct](http://contributor-covenant.org/version/1/1/0/) that applies
+to communication around the project.

node_modules/prosemirror-keymap/dist/index.cjs

@@ -0,0 +1,65 @@
+'use strict';
+
+var w3cKeyname = require('w3c-keyname');
+var prosemirrorState = require('prosemirror-state');
+var mac = typeof navigator != "undefined" && /Mac|iP(hone|[oa]d)/.test(navigator.platform);
+var windows = typeof navigator != "undefined" && /Win/.test(navigator.platform);
+function normalizeKeyName(name) {
+  var parts = name.split(/-(?!$)/),
+    result = parts[parts.length - 1];
+  if (result == "Space") result = " ";
+  var alt, ctrl, shift, meta;
+  for (var i = 0; i < parts.length - 1; i++) {
+    var mod = parts[i];
+    if (/^(cmd|meta|m)$/i.test(mod)) meta = true;else if (/^a(lt)?$/i.test(mod)) alt = true;else if (/^(c|ctrl|control)$/i.test(mod)) ctrl = true;else if (/^s(hift)?$/i.test(mod)) shift = true;else if (/^mod$/i.test(mod)) {
+      if (mac) meta = true;else ctrl = true;
+    } else throw new Error("Unrecognized modifier name: " + mod);
+  }
+  if (alt) result = "Alt-" + result;
+  if (ctrl) result = "Ctrl-" + result;
+  if (meta) result = "Meta-" + result;
+  if (shift) result = "Shift-" + result;
+  return result;
+}
+function normalize(map) {
+  var copy = Object.create(null);
+  for (var prop in map) copy[normalizeKeyName(prop)] = map[prop];
+  return copy;
+}
+function modifiers(name, event) {
+  var shift = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : true;
+  if (event.altKey) name = "Alt-" + name;
+  if (event.ctrlKey) name = "Ctrl-" + name;
+  if (event.metaKey) name = "Meta-" + name;
+  if (shift && event.shiftKey) name = "Shift-" + name;
+  return name;
+}
+function keymap(bindings) {
+  return new prosemirrorState.Plugin({
+    props: {
+      handleKeyDown: keydownHandler(bindings)
+    }
+  });
+}
+function keydownHandler(bindings) {
+  var map = normalize(bindings);
+  return function (view, event) {
+    var name = w3cKeyname.keyName(event),
+      baseName,
+      direct = map[modifiers(name, event)];
+    if (direct && direct(view.state, view.dispatch, view)) return true;
+    if (name.length == 1 && name != " ") {
+      if (event.shiftKey) {
+        var noShift = map[modifiers(name, event, false)];
+        if (noShift && noShift(view.state, view.dispatch, view)) return true;
+      }
+      if ((event.altKey || event.metaKey || event.ctrlKey) && !(windows && event.ctrlKey && event.altKey) && (baseName = w3cKeyname.base[event.keyCode]) && baseName != name) {
+        var fromCode = map[modifiers(baseName, event)];
+        if (fromCode && fromCode(view.state, view.dispatch, view)) return true;
+      }
+    }
+    return false;
+  };
+}
+exports.keydownHandler = keydownHandler;
+exports.keymap = keymap;

node_modules/prosemirror-keymap/dist/index.d.cts

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+import { Command, Plugin } from 'prosemirror-state';
+import { EditorView } from 'prosemirror-view';
+
+/**
+Create a keymap plugin for the given set of bindings.
+
+Bindings should map key names to [command](https://prosemirror.net/docs/ref/#commands)-style
+functions, which will be called with `(EditorState, dispatch,
+EditorView)` arguments, and should return true when they've handled
+the key. Note that the view argument isn't part of the command
+protocol, but can be used as an escape hatch if a binding needs to
+directly interact with the UI.
+
+Key names may be strings like `"Shift-Ctrl-Enter"`—a key
+identifier prefixed with zero or more modifiers. Key identifiers
+are based on the strings that can appear in
+[`KeyEvent.key`](https:developer.mozilla.org/en-US/docs/Web/API/KeyboardEvent/key).
+Use lowercase letters to refer to letter keys (or uppercase letters
+if you want shift to be held). You may use `"Space"` as an alias
+for the `" "` name.
+
+Modifiers can be given in any order. `Shift-` (or `s-`), `Alt-` (or
+`a-`), `Ctrl-` (or `c-` or `Control-`) and `Cmd-` (or `m-` or
+`Meta-`) are recognized. For characters that are created by holding
+shift, the `Shift-` prefix is implied, and should not be added
+explicitly.
+
+You can use `Mod-` as a shorthand for `Cmd-` on Mac and `Ctrl-` on
+other platforms.
+
+You can add multiple keymap plugins to an editor. The order in
+which they appear determines their precedence (the ones early in
+the array get to dispatch first).
+*/
+declare function keymap(bindings: {
+    [key: string]: Command;
+}): Plugin;
+/**
+Given a set of bindings (using the same format as
+[`keymap`](https://prosemirror.net/docs/ref/#keymap.keymap)), return a [keydown
+handler](https://prosemirror.net/docs/ref/#view.EditorProps.handleKeyDown) that handles them.
+*/
+declare function keydownHandler(bindings: {
+    [key: string]: Command;
+}): (view: EditorView, event: KeyboardEvent) => boolean;
+
+export { keydownHandler, keymap };

node_modules/prosemirror-keymap/dist/index.d.ts

@@ -0,0 +1,47 @@
+import { Command, Plugin } from 'prosemirror-state';
+import { EditorView } from 'prosemirror-view';
+
+/**
+Create a keymap plugin for the given set of bindings.
+
+Bindings should map key names to [command](https://prosemirror.net/docs/ref/#commands)-style
+functions, which will be called with `(EditorState, dispatch,
+EditorView)` arguments, and should return true when they've handled
+the key. Note that the view argument isn't part of the command
+protocol, but can be used as an escape hatch if a binding needs to
+directly interact with the UI.
+
+Key names may be strings like `"Shift-Ctrl-Enter"`—a key
+identifier prefixed with zero or more modifiers. Key identifiers
+are based on the strings that can appear in
+[`KeyEvent.key`](https:developer.mozilla.org/en-US/docs/Web/API/KeyboardEvent/key).
+Use lowercase letters to refer to letter keys (or uppercase letters
+if you want shift to be held). You may use `"Space"` as an alias
+for the `" "` name.
+
+Modifiers can be given in any order. `Shift-` (or `s-`), `Alt-` (or
+`a-`), `Ctrl-` (or `c-` or `Control-`) and `Cmd-` (or `m-` or
+`Meta-`) are recognized. For characters that are created by holding
+shift, the `Shift-` prefix is implied, and should not be added
+explicitly.
+
+You can use `Mod-` as a shorthand for `Cmd-` on Mac and `Ctrl-` on
+other platforms.
+
+You can add multiple keymap plugins to an editor. The order in
+which they appear determines their precedence (the ones early in
+the array get to dispatch first).
+*/
+declare function keymap(bindings: {
+    [key: string]: Command;
+}): Plugin;
+/**
+Given a set of bindings (using the same format as
+[`keymap`](https://prosemirror.net/docs/ref/#keymap.keymap)), return a [keydown
+handler](https://prosemirror.net/docs/ref/#view.EditorProps.handleKeyDown) that handles them.
+*/
+declare function keydownHandler(bindings: {
+    [key: string]: Command;
+}): (view: EditorView, event: KeyboardEvent) => boolean;
+
+export { keydownHandler, keymap };

node_modules/prosemirror-keymap/dist/index.js

@@ -0,0 +1,128 @@
+import { keyName, base } from 'w3c-keyname';
+import { Plugin } from 'prosemirror-state';
+
+const mac = typeof navigator != "undefined" && /Mac|iP(hone|[oa]d)/.test(navigator.platform);
+const windows = typeof navigator != "undefined" && /Win/.test(navigator.platform);
+function normalizeKeyName(name) {
+    let parts = name.split(/-(?!$)/), result = parts[parts.length - 1];
+    if (result == "Space")
+        result = " ";
+    let alt, ctrl, shift, meta;
+    for (let i = 0; i < parts.length - 1; i++) {
+        let mod = parts[i];
+        if (/^(cmd|meta|m)$/i.test(mod))
+            meta = true;
+        else if (/^a(lt)?$/i.test(mod))
+            alt = true;
+        else if (/^(c|ctrl|control)$/i.test(mod))
+            ctrl = true;
+        else if (/^s(hift)?$/i.test(mod))
+            shift = true;
+        else if (/^mod$/i.test(mod)) {
+            if (mac)
+                meta = true;
+            else
+                ctrl = true;
+        }
+        else
+            throw new Error("Unrecognized modifier name: " + mod);
+    }
+    if (alt)
+        result = "Alt-" + result;
+    if (ctrl)
+        result = "Ctrl-" + result;
+    if (meta)
+        result = "Meta-" + result;
+    if (shift)
+        result = "Shift-" + result;
+    return result;
+}
+function normalize(map) {
+    let copy = Object.create(null);
+    for (let prop in map)
+        copy[normalizeKeyName(prop)] = map[prop];
+    return copy;
+}
+function modifiers(name, event, shift = true) {
+    if (event.altKey)
+        name = "Alt-" + name;
+    if (event.ctrlKey)
+        name = "Ctrl-" + name;
+    if (event.metaKey)
+        name = "Meta-" + name;
+    if (shift && event.shiftKey)
+        name = "Shift-" + name;
+    return name;
+}
+/**
+Create a keymap plugin for the given set of bindings.
+
+Bindings should map key names to [command](https://prosemirror.net/docs/ref/#commands)-style
+functions, which will be called with `(EditorState, dispatch,
+EditorView)` arguments, and should return true when they've handled
+the key. Note that the view argument isn't part of the command
+protocol, but can be used as an escape hatch if a binding needs to
+directly interact with the UI.
+
+Key names may be strings like `"Shift-Ctrl-Enter"`—a key
+identifier prefixed with zero or more modifiers. Key identifiers
+are based on the strings that can appear in
+[`KeyEvent.key`](https:developer.mozilla.org/en-US/docs/Web/API/KeyboardEvent/key).
+Use lowercase letters to refer to letter keys (or uppercase letters
+if you want shift to be held). You may use `"Space"` as an alias
+for the `" "` name.
+
+Modifiers can be given in any order. `Shift-` (or `s-`), `Alt-` (or
+`a-`), `Ctrl-` (or `c-` or `Control-`) and `Cmd-` (or `m-` or
+`Meta-`) are recognized. For characters that are created by holding
+shift, the `Shift-` prefix is implied, and should not be added
+explicitly.
+
+You can use `Mod-` as a shorthand for `Cmd-` on Mac and `Ctrl-` on
+other platforms.
+
+You can add multiple keymap plugins to an editor. The order in
+which they appear determines their precedence (the ones early in
+the array get to dispatch first).
+*/
+function keymap(bindings) {
+    return new Plugin({ props: { handleKeyDown: keydownHandler(bindings) } });
+}
+/**
+Given a set of bindings (using the same format as
+[`keymap`](https://prosemirror.net/docs/ref/#keymap.keymap)), return a [keydown
+handler](https://prosemirror.net/docs/ref/#view.EditorProps.handleKeyDown) that handles them.
+*/
+function keydownHandler(bindings) {
+    let map = normalize(bindings);
+    return function (view, event) {
+        let name = keyName(event), baseName, direct = map[modifiers(name, event)];
+        if (direct && direct(view.state, view.dispatch, view))
+            return true;
+        // A character key
+        if (name.length == 1 && name != " ") {
+            if (event.shiftKey) {
+                // In case the name was already modified by shift, try looking
+                // it up without its shift modifier
+                let noShift = map[modifiers(name, event, false)];
+                if (noShift && noShift(view.state, view.dispatch, view))
+                    return true;
+            }
+            if ((event.altKey || event.metaKey || event.ctrlKey) &&
+                // Ctrl-Alt may be used for AltGr on Windows
+                !(windows && event.ctrlKey && event.altKey) &&
+                (baseName = base[event.keyCode]) && baseName != name) {
+                // Try falling back to the keyCode when there's a modifier
+                // active or the character produced isn't ASCII, and our table
+                // produces a different name from the the keyCode. See #668,
+                // #1060, #1529.
+                let fromCode = map[modifiers(baseName, event)];
+                if (fromCode && fromCode(view.state, view.dispatch, view))
+                    return true;
+            }
+        }
+        return false;
+    };
+}
+
+export { keydownHandler, keymap };

node_modules/prosemirror-keymap/package.json

@@ -0,0 +1,38 @@
+{
+  "name": "prosemirror-keymap",
+  "version": "1.2.3",
+  "description": "Keymap plugin for ProseMirror",
+  "type": "module",
+  "main": "dist/index.cjs",
+  "module": "dist/index.js",
+  "types": "dist/index.d.ts",
+  "exports": {
+    "import": "./dist/index.js",
+    "require": "./dist/index.cjs"
+  },
+  "sideEffects": false,
+  "license": "MIT",
+  "maintainers": [
+    {
+      "name": "Marijn Haverbeke",
+      "email": "marijn@haverbeke.berlin",
+      "web": "http://marijnhaverbeke.nl"
+    }
+  ],
+  "repository": {
+    "type": "git",
+    "url": "git://github.com/prosemirror/prosemirror-keymap.git"
+  },
+  "dependencies": {
+    "w3c-keyname": "^2.2.0",
+    "prosemirror-state": "^1.0.0"
+  },
+  "devDependencies": {
+    "@prosemirror/buildhelper": "^0.1.5",
+    "prosemirror-test-builder": "^1.0.0"
+  },
+  "scripts": {
+    "test": "pm-runtests",
+    "prepare": "pm-buildhelper src/keymap.ts"
+  }
+}

node_modules/prosemirror-keymap/src/README.md

@@ -0,0 +1,5 @@
+A plugin for conveniently defining key bindings.
+
+@keymap
+
+@keydownHandler

node_modules/prosemirror-keymap/src/keymap.ts

@@ -0,0 +1,105 @@
+import {base, keyName} from "w3c-keyname"
+import {Plugin, Command} from "prosemirror-state"
+import {EditorView} from "prosemirror-view"
+
+const mac = typeof navigator != "undefined" && /Mac|iP(hone|[oa]d)/.test(navigator.platform)
+const windows = typeof navigator != "undefined" && /Win/.test(navigator.platform)
+
+function normalizeKeyName(name: string) {
+  let parts = name.split(/-(?!$)/), result = parts[parts.length - 1]
+  if (result == "Space") result = " "
+  let alt, ctrl, shift, meta
+  for (let i = 0; i < parts.length - 1; i++) {
+    let mod = parts[i]
+    if (/^(cmd|meta|m)$/i.test(mod)) meta = true
+    else if (/^a(lt)?$/i.test(mod)) alt = true
+    else if (/^(c|ctrl|control)$/i.test(mod)) ctrl = true
+    else if (/^s(hift)?$/i.test(mod)) shift = true
+    else if (/^mod$/i.test(mod)) { if (mac) meta = true; else ctrl = true }
+    else throw new Error("Unrecognized modifier name: " + mod)
+  }
+  if (alt) result = "Alt-" + result
+  if (ctrl) result = "Ctrl-" + result
+  if (meta) result = "Meta-" + result
+  if (shift) result = "Shift-" + result
+  return result
+}
+
+function normalize(map: {[key: string]: Command}) {
+  let copy: {[key: string]: Command} = Object.create(null)
+  for (let prop in map) copy[normalizeKeyName(prop)] = map[prop]
+  return copy
+}
+
+function modifiers(name: string, event: KeyboardEvent, shift = true) {
+  if (event.altKey) name = "Alt-" + name
+  if (event.ctrlKey) name = "Ctrl-" + name
+  if (event.metaKey) name = "Meta-" + name
+  if (shift && event.shiftKey) name = "Shift-" + name
+  return name
+}
+
+/// Create a keymap plugin for the given set of bindings.
+///
+/// Bindings should map key names to [command](#commands)-style
+/// functions, which will be called with `(EditorState, dispatch,
+/// EditorView)` arguments, and should return true when they've handled
+/// the key. Note that the view argument isn't part of the command
+/// protocol, but can be used as an escape hatch if a binding needs to
+/// directly interact with the UI.
+///
+/// Key names may be strings like `"Shift-Ctrl-Enter"`—a key
+/// identifier prefixed with zero or more modifiers. Key identifiers
+/// are based on the strings that can appear in
+/// [`KeyEvent.key`](https:///developer.mozilla.org/en-US/docs/Web/API/KeyboardEvent/key).
+/// Use lowercase letters to refer to letter keys (or uppercase letters
+/// if you want shift to be held). You may use `"Space"` as an alias
+/// for the `" "` name.
+///
+/// Modifiers can be given in any order. `Shift-` (or `s-`), `Alt-` (or
+/// `a-`), `Ctrl-` (or `c-` or `Control-`) and `Cmd-` (or `m-` or
+/// `Meta-`) are recognized. For characters that are created by holding
+/// shift, the `Shift-` prefix is implied, and should not be added
+/// explicitly.
+///
+/// You can use `Mod-` as a shorthand for `Cmd-` on Mac and `Ctrl-` on
+/// other platforms.
+///
+/// You can add multiple keymap plugins to an editor. The order in
+/// which they appear determines their precedence (the ones early in
+/// the array get to dispatch first).
+export function keymap(bindings: {[key: string]: Command}): Plugin {
+  return new Plugin({props: {handleKeyDown: keydownHandler(bindings)}})
+}
+
+/// Given a set of bindings (using the same format as
+/// [`keymap`](#keymap.keymap)), return a [keydown
+/// handler](#view.EditorProps.handleKeyDown) that handles them.
+export function keydownHandler(bindings: {[key: string]: Command}): (view: EditorView, event: KeyboardEvent) => boolean {
+  let map = normalize(bindings)
+  return function(view, event) {
+    let name = keyName(event), baseName, direct = map[modifiers(name, event)]
+    if (direct && direct(view.state, view.dispatch, view)) return true
+    // A character key
+    if (name.length == 1 && name != " ") {
+      if (event.shiftKey) {
+        // In case the name was already modified by shift, try looking
+        // it up without its shift modifier
+        let noShift = map[modifiers(name, event, false)]
+        if (noShift && noShift(view.state, view.dispatch, view)) return true
+      }
+      if ((event.altKey || event.metaKey || event.ctrlKey) &&
+          // Ctrl-Alt may be used for AltGr on Windows
+          !(windows && event.ctrlKey && event.altKey) &&
+          (baseName = base[event.keyCode]) && baseName != name) {
+        // Try falling back to the keyCode when there's a modifier
+        // active or the character produced isn't ASCII, and our table
+        // produces a different name from the the keyCode. See #668,
+        // #1060, #1529.
+        let fromCode = map[modifiers(baseName, event)]
+        if (fromCode && fromCode(view.state, view.dispatch, view)) return true
+      }
+    }
+    return false
+  }
+}