{"id":16937885,"url":"https://github.com/unixzii/swiftui-for-react-devs","last_synced_at":"2025-03-25T15:31:19.186Z","repository":{"id":46556947,"uuid":"275149874","full_name":"unixzii/swiftui-for-react-devs","owner":"unixzii","description":"A cheat sheet that helps React developers to quickly start with SwiftUI.","archived":false,"fork":false,"pushed_at":"2020-06-27T08:31:19.000Z","size":27,"stargazers_count":400,"open_issues_count":0,"forks_count":15,"subscribers_count":5,"default_branch":"master","last_synced_at":"2025-03-20T13:11:16.153Z","etag":null,"topics":["cheatsheet","ios","javascript","react","swift","swiftui","swiftui-learning","tutorial"],"latest_commit_sha":null,"homepage":"","language":null,"has_issues":true,"has_wiki":null,"has_pages":null,"mirror_url":null,"source_name":null,"license":"cc-by-sa-4.0","status":null,"scm":"git","pull_requests_enabled":true,"icon_url":"https://github.com/unixzii.png","metadata":{"files":{"readme":"README.rst","changelog":"CHANGELOG.md","contributing":null,"funding":null,"license":"LICENSE","code_of_conduct":null,"threat_model":null,"audit":null,"citation":null,"codeowners":null,"security":null,"support":null}},"created_at":"2020-06-26T12:23:16.000Z","updated_at":"2025-03-16T09:48:39.000Z","dependencies_parsed_at":"2022-09-06T10:10:46.027Z","dependency_job_id":null,"html_url":"https://github.com/unixzii/swiftui-for-react-devs","commit_stats":null,"previous_names":[],"tags_count":3,"template":false,"template_full_name":null,"repository_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/unixzii%2Fswiftui-for-react-devs","tags_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/unixzii%2Fswiftui-for-react-devs/tags","releases_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/unixzii%2Fswiftui-for-react-devs/releases","manifests_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/unixzii%2Fswiftui-for-react-devs/manifests","owner_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/owners/unixzii","download_url":"https://codeload.github.com/unixzii/swiftui-for-react-devs/tar.gz/refs/heads/master","host":{"name":"GitHub","url":"https://github.com","kind":"github","repositories_count":245489764,"owners_count":20623789,"icon_url":"https://github.com/github.png","version":null,"created_at":"2022-05-30T11:31:42.601Z","updated_at":"2022-07-04T15:15:14.044Z","host_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub","repositories_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories","repository_names_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repository_names","owners_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/owners"}},"keywords":["cheatsheet","ios","javascript","react","swift","swiftui","swiftui-learning","tutorial"],"created_at":"2024-10-13T21:00:23.819Z","updated_at":"2025-03-25T15:31:18.670Z","avatar_url":"https://github.com/unixzii.png","language":null,"readme":"============================\nSwiftUI for React Developers\n============================\nThis is a cheat sheet that helps you React developers to quickly start with SwiftUI.\n\n.. note:: I assume that you are familiar with React Hooks. For the transformation from **Class Components** to **Hooks**, I highly recommend you to visit `Thinking in React Hooks`_, which is a great visualized explanation.\n\n.. contents:: :local:\n\nBasics\n======\n\nBuilding the Contents\n---------------------\nOne of the core parts of these declarative UI frameworks is its DSL syntax,\nboth of them do provide the special inline syntax for building the content.\nFor React, that calls JSX and need to be transpiled by **Babel (with plugins)**\nor **tsc**. For SwiftUI, it's a built-in syntax in Swift 5.1 called\n**Function Builders**.\n\nIn React:\n\n.. code-block:: javascript\n\n  const Hello = () =\u003e {\n    return (\n      \u003cdiv\u003e\n        \u003cp\u003eHello\u003c/p\u003e\n        \u003cp\u003eReact is awesome!\u003c/p\u003e\n      \u003c/div\u003e\n    );\n  };\n  \nIn SwiftUI:\n\n.. code-block:: swift\n\n  struct Hello: View {\n      var body: some View {\n          VStack {\n              Text(\"Hello\")\n              Text(\"SwiftUI is awesome!\")\n          }\n      }\n  }\n\nAs you can see, Swift's syntax feels more natural and JSX seems to be more exotic.\nActually, Web developers should be more familiar with JSX, after all, it's just\nlike HTML.\n\nProps\n-----\nMost of components render different contents depend on what input is given to it.\nThat is what props comes to play.\n\nIn React:\n\n.. code-block:: javascript\n\n  const Hello = ({name}) =\u003e {\n    return \u003cp\u003eHello, {name}!\u003c/p\u003e;\n  };\n\nIn SwiftUI:\n\n.. code-block:: swift\n\n  struct Hello: View {\n      let name: String\n      \n      var body: some View {\n          Text(\"Hello, \\(name)!\")\n      }\n  }\n\nAlmost the same in semantic!\n\nConditional \u0026 List\n------------------\nStructure of the contents can be dynamic, the most common patterns are conditional\nand list.\n\nIn React:\n\n.. code-block:: javascript\n\n  const UserList = ({ users }) =\u003e {\n    if (!users.length) {\n      return \u003cp\u003eNo users\u003c/p\u003e;\n    }\n    \n    return (\n      \u003cul\u003e\n        {users.map(e =\u003e (\n          \u003cli key={e.id}\u003e{e.username}\u003c/li\u003e\n        ))}\n      \u003c/ul\u003e\n    );\n  }\n\nIn SwiftUI:\n\n.. code-block:: swift\n\n  struct UserList: View {\n      let users: [User]\n      \n      var body: some View {\n          Group {\n              if users.isEmpty {\n                  Text(\"No users\")\n              } else {\n                  VStack {\n                      ForEach(users, id: \\.id) {\n                          Text(\"\\($0.username)\")\n                      }\n                  }\n              }\n          }\n      }\n  }\n\nSwiftUI has built-in ``ForEach`` element, you don't need to manually map the data\narray to views, so you can have a much neater code.\n\nEvents Handling\n---------------\nIn React:\n\n.. code-block:: javascript\n\n  const Hello = () =\u003e {\n    const clickHandler = useCallback(e =\u003e {\n      console.log('Yay, the button is clicked!');\n    }, []);\n    return \u003cbutton onClick={clickHandler}\u003eClick Me\u003c/button\u003e;\n  };\n\nIn SwiftUI:\n\n.. code-block:: swift\n\n  struct Hello: View {\n      var body: some View {\n          Button(\"Click Me\") {\n              print(\"Yay, the button is clicked!\")\n          }\n      }\n  }\n\nSwiftUI looks cleaner because there is no ``useCallback`` meme. In JavaScript, if\nyou create a function inside another function (let's say ``foo``), the former\nalways has a different reference every time ``foo`` is called. That means, the\ncomponent receives the function as a **prop** will be rerendered every time.\n\nIn consideration of performance, React provided ``useCallback``. It takes a value\nas **dependency**, and will return the same reference if the dependency is not\nchanged.\n\nIn SwiftUI, Apple have not provided such mechanism, and developers can just take\nno account of that.\n\nState\n-----\nSometimes, a component may retain some internal state even it's get updated by new\nprops. Or it need to update itself without the props changed. State was born for\nthis mission.\n\nThe example combines all the things we've talked above. Let's create a simple\ncounter.\n\nIn React:\n\n.. code-block:: javascript\n\n  const Counter = ({ initialValue }) =\u003e {\n    const [counter, setCounter] = useState(initialValue);\n    const increaseCounter = useCallback(() =\u003e {\n      setCounter(counter + 1);\n    }, [counter]);\n\n    return (\n      \u003cdiv\u003e\n        \u003cp\u003e{counter}\u003c/p\u003e\n        \u003cbutton onClick={increaseCounter}\u003eIncrease\u003c/button\u003e\n      \u003c/div\u003e\n    );\n  };\n\nIn SwiftUI:\n\n.. code-block:: swift\n\n  struct Counter: View {\n      let initialValue: Int\n      \n      @State\n      var counter: Int\n      \n      init(initialValue: Int) {\n          self.initialValue = initialValue\n          _counter = State(initialValue: initialValue)\n      }\n      \n      var body: some View {\n          VStack {\n              Text(\"\\(counter)\")\n              Button(\"Increase\") {\n                  self.counter += 1\n              }\n          }\n      }\n  }\n\nIt seems to be a little complicated, let's decompose them into pieces.\n\nThe counter has a internal state: ``counter``, and it's initial value is from the\ninput props. In SwiftUI, a state is declared with ``@State`` property wrapper.\nI'll explain that later but now, you could just consider it as a special mark.\n\nThe real ``counter`` value is wrapped in the ``_counter`` member variable (which\nhas type of ``State\u003cInt\u003e``), and we can use the input prop ``initialValue`` to\ninitialize it.\n\nWe trigger an update by directly setting the ``counter`` value. This is not just\nan assignment, instead, this will cause some logic inside ``State`` to take effect\nand notify the SwiftUI framework to update our view. SwiftUI packed the ``xxx``\nand ``setXXX`` functions into this little syntactic sugar to simplify our code.\n\nEffects\n-------\nHow can we perform some side-effects when the component is updated? In React, we\nhave ``useEffect``:\n\n.. code-block:: javascript\n\n  const Hello = ({ greeting, name }) =\u003e {\n    useEffect(() =\u003e {\n      console.log(`Hey, ${name}!`);\n    }, [name]);\n\n    useEffect(() =\u003e {\n      console.log('Something changed!');\n    });\n\n    return \u003cp\u003e{greeting}, {name}!\u003c/p\u003e;\n  };\n\nIn SwiftUI:\n\n.. code-block:: swift\n\n  func uniqueId() -\u003e some Equatable {\n      return UUID().uuidString  // Maybe not so unique?\n  }\n\n  struct Hello: View {\n      let greeting: String\n      let name: String\n      \n      var body: some View {\n          Text(\"\\(greeting), \\(name)!\")\n              .onChange(of: name) { name in\n                  print(\"Hey, \\(name)!\")\n              }\n              .onChange(of: uniqueId()) { _ in\n                  print(\"Something changed!\")\n              }\n      }\n  }\n\nIn SwiftUI, we have neither hook functions nor lifecycle functions, but we have\nmodifiers! Every view type has a lot of modifier functions attached to it.\n\n``onChange`` behaves just like ``useEffect``, the ``action`` closure is called\nevery time the ``value`` changes and the first time the receiver view renders.\nBut we must pass a value, if you need perform something whenever something\nchanged, you can use a trick:\n\nCreate a function that returns an unique object every time it gets called. You can\nuse **UUID**, global incrementing integer and even timestamps!\n\nLifecycle Callbacks\n-------------------\nIn React:\n\n.. code-block:: javascript\n\n  const Hello = () =\u003e {\n    useEffect(() =\u003e {\n      console.log('I\\'m just mounted!');\n      return () =\u003e {\n        console.log('I\\'m just unmounted!');\n      };\n    }, []);\n\n    return \u003cp\u003eHello\u003c/p\u003e;\n  };\n\nIn SwiftUI:\n\n.. code-block:: swift\n\n  struct Hello: View {\n      var body: some View {\n          Text(\"Hello\")\n              .onAppear {\n                  print(\"I'm just mounted!\")\n              }\n              .onDisappear {\n                  print(\"I'm just unmounted!\")\n              }\n      }\n  }\n\nIt's that easy.\n\nRefs\n----\nComponents can have some internal state that will not trigger view update when it\nis changed. In React, we have **ref**:\n\nIn React:\n\n.. code-block:: javascript\n\n  const Hello = () =\u003e {\n    const timerId = useRef(-1);\n    useEffect(() =\u003e {\n      timerId.current = setInterval(() =\u003e {\n        console.log('Tick!');\n      }, 1000);\n      return () =\u003e {\n        clearInterval(timerId.current);\n      };\n    });\n\n    return \u003cp\u003eHello\u003c/p\u003e;\n  };\n\nIn SwiftUI:\n\n.. code-block:: swift\n\n  struct Hello: View {\n      private class Refs: ObservableObject {\n          var timer: Timer?\n      }\n      \n      @StateObject\n      private var refs = Refs()\n      \n      var body: some View {\n          Text(\"Hello\")\n              .onAppear {\n                  refs.timer =\n                      Timer.scheduledTimer(withTimeInterval: 1,\n                                          repeats: true) { _ in\n                          print(\"Tick!\")\n                      }\n              }\n              .onDisappear {\n                  refs.timer?.invalidate()\n              }\n      }\n  }\n\nAnd we've got two approaches:\n\n.. code-block:: swift\n\n  struct Hello: View {\n      @State\n      private var timer: Timer? = nil\n      \n      var body: some View {\n          Text(\"Hello\")\n              .onAppear {\n                  self.timer =\n                      Timer.scheduledTimer(withTimeInterval: 1,\n                                          repeats: true) { _ in\n                          print(\"Tick!\")\n                      }\n              }\n              .onDisappear {\n                  self.timer?.invalidate()\n              }\n      }\n  }\n\nYou may wonder why setting the state will not lead to view updates. SwiftUI is\npretty clever to handle the state, it uses a technique called\n**Dependency Tracking**. If you are familiar with **Vue.js** or **MobX**, you may\nunderstand it immediately. That's say, if we never **access** the state's value in\nthe view's building process (which not includes ``onAppear`` calls), that state\nwill be unbound and can be updated freely without causing view updates.\n\nDOM Refs\n--------\nAccessing the native DOM object is an advanced but essential feature for Web\nfrontend development.\n\nIn React:\n\n.. code-block:: javascript\n\n  const Hello = () =\u003e {\n    const pEl = useRef();\n    useEffect(() =\u003e {\n      pEl.current.innerHTML = '\u003cb\u003eHello\u003c/b\u003e, world!';\n    }, []);\n\n    return \u003cp ref={pEl}\u003e\u003c/p\u003e;\n  };\n\nIn SwiftUI, we apparently don't have DOM, but for native applications, **View** is\na common concept. We can bridge native views to SwiftUI and gain control of them by\nthe way.\n\nFirst, let's bridge an existed ``UIView`` to SwiftUI:\n\n.. code-block:: swift\n\n  struct MapView: UIViewRepresentable {\n      let mapType: MKMapType\n      let ref: RefBox\u003cMKMapView\u003e\n      \n      typealias UIViewType = MKMapView\n      \n      func makeUIView(context: Context) -\u003e MKMapView {\n          return MKMapView(frame: .zero)\n      }\n      \n      func updateUIView(_ uiView: MKMapView, context: Context) {\n          uiView.mapType = mapType\n          ref.current = uiView\n      }\n  }\n\nEvery time we modified the input props, the ``updateUIView`` gets called, we can\nupdate our ``UIView`` there. To export the ``UIView`` instance to the outer, we\ndeclare a ref prop, and set it's ``current`` property to the view instance\nwhenever the ``updateUIView`` gets called.\n\nNow we can manipulate the native view in our SwiftUI views:\n\n.. code-block:: swift\n\n  struct Hello: View {\n      @State\n      var mapType = MKMapType.standard\n      \n      @StateObject\n      var mapViewRef = RefBox\u003cMKMapView\u003e()\n      \n      var body: some View {\n          VStack {\n              MapView(mapType: mapType, ref: mapViewRef)\n              Picker(\"Map Type\", selection: $mapType) {\n                  Text(\"Standard\").tag(MKMapType.standard)\n                  Text(\"Satellite\").tag(MKMapType.satellite)\n                  Text(\"Hybrid\").tag(MKMapType.hybrid)\n              }\n              .pickerStyle(SegmentedPickerStyle())\n          }\n          .onAppear {\n              if let mapView = self.mapViewRef.current {\n                  mapView.setRegion(.init(center: .init(latitude: 34, longitude: 108),\n                                          span: MKCoordinateSpan(latitudeDelta: 50,\n                                                                 longitudeDelta: 60)),\n                                    animated: true)\n              }\n          }\n      }\n  }\n\nNote that, we'd better encapsulate all the manipulations of native views to a\ndedicated SwiftUI view. It's not a good practice to manipulate native objects\neverywhere, as well as in React.\n\nContext\n-------\nPassing data between the components can be hard, especially when you travel \nthrough the hierachy. And **Context** to the rescue!\n\nLet's look at an example in React:\n\n.. code-block:: javascript\n\n  const UserContext = createContext({});\n\n  const UserInfo = () =\u003e {\n    const { username, logout } = useContext(UserContext);\n    if (!username) {\n      return \u003cp\u003eWelcome, please login.\u003c/p\u003e;\n    }\n    return (\n      \u003cp\u003e\n        Hello, {username}.\n        \u003cbutton onClick={logout}\u003eLogout\u003c/button\u003e\n      \u003c/p\u003e\n    );\n  }\n\n  const Panel = () =\u003e {\n    return (\n      \u003cdiv\u003e\n        \u003cUserInfo /\u003e\n        \u003cUserInfo /\u003e\n      \u003c/div\u003e\n    );\n  }\n\n  const App = () =\u003e {\n    const [username, setUsername] = useState('cyan');\n    const logout = useCallback(() =\u003e {\n      setUsername(null);\n    }, [setUsername]);\n    return (\n      \u003cUserContext.Provider value={{ username, logout }}\u003e\n        \u003cPanel /\u003e\n        \u003cPanel /\u003e\n      \u003c/UserContext.Provider\u003e\n    );\n  }\n\nEven if the ``\u003cUserInfo\u003e`` is at a very deep position, we can use context to grab\nthe data we need through the tree. And also, contexts are often used by components\nto communicate with each other.\n\nIn SwiftUI:\n\n.. code-block:: swift\n\n  class UserContext: ObservableObject {\n      @Published\n      var username: String?\n      \n      init(username: String?) {\n          self.username = username\n      }\n      \n      func logout() {\n          self.username = nil\n      }\n  }\n\n  struct UserInfo: View {\n      @EnvironmentObject\n      var userContext: UserContext\n      \n      var body: some View {\n          Group {\n              if userContext.username == nil {\n                  Text(\"Welcome, please login.\")\n              } else {\n                  HStack {\n                      Text(\"Hello, \\(userContext.username!).\")\n                      Button(\"Logout\") {\n                          self.userContext.logout()\n                      }\n                  }\n              }\n          }\n      }\n  }\n\n  struct Panel: View {\n      var body: some View {\n          VStack {\n              UserInfo()\n              UserInfo()\n          }\n      }\n  }\n\n  struct App: View {\n      @StateObject\n      var userContext = UserContext(username: \"cyan\")\n      \n      var body: some View {\n          VStack {\n              Panel()\n              Panel()\n          }\n          .environmentObject(userContext)\n      }\n  }\n\nContexts are provided by ``environmentObject`` modifier and can be retrieved via\n``@EnvironmentObject`` property wrapper. And in SwiftUI, context objects can use\nto update views. We don't need to wrap some functions that modifies the provider\ninto the context objects. Context objects are ``ObservableObject``, so they can\nnotify all the consumers automatically when they are changed.\n\nAnother interesting fact is that the contexts are identified by the type of\ncontext objects, thus we don't need to maintain the context objects globally.\n\nImplementations Behind the Scene\n================================\n\nWhat are ``View`` objects?\n--------------------------\nIn SwiftUI, the ``View`` objects are different from the ``React.Component`` objects.\nActually, there is no ``React.Component`` equivalent in SwiftUI. ``View`` objects\nare stateless themselves, they are just like ``Widget`` objects in Flutter, which\nare used to describe the configuration of views.\n\nThat means, if you want attach some state to the view, you must mark it using\n``@State``. Any other member variables are transient and live shorter than the view.\nAfter all, ``View`` objects are created and destroyed frequently during the building\nprocess, but meanwhile views may keep stable.\n\nHow ``@State`` works?\n---------------------\nTo explain this question, you should know what is ``property wrapper`` before.\nThis proposal describe that in detail: `[SE-0258] Property Wrappers`_.\n\nBefore the ``View`` is mounted, SwiftUI will use type metadata to find out all the\n``State`` fields (backends of the properties marked with ``@State``), and add them\nto a ``DynamicPropertyBuffer`` sequentially, we call this process as \"registration\".\n\nThe buffer is aware of the view's lifecycle. When a new ``View`` object is created,\nSwiftUI enumerates the ``State`` fields, and get its corresponding previous value\nfrom the buffer. These fields are identified by their storage index in container\nstruct, pretty like how **Hook** works in React.\n\nIn this way, even though the ``View`` objects are recreated frequently, as long as\nthe view is not unmounted, the state will be kept.\n\nHow function builders works?\n----------------------------\nAs we mention earlier, SwiftUI use **Function Builders** as DSL to let us build\ncontents. There is also a draft proposal about it: `Function builders (draft proposal)`_.\n\nLet's first take a look at how JSX is transpiled to JavaScript. We have this:\n\n.. code-block:: javascript\n\n  const UserInfo = ({ users }) =\u003e {\n    if (!users.length) {\n      return \u003cp\u003eNo users\u003c/p\u003e;\n    }\n    \n    return (\n      \u003cdiv\u003e\n        \u003cp\u003eGreat!\u003c/p\u003e\n        \u003cp\u003eWe have {users.length} users!\u003c/p\u003e\n      \u003c/div\u003e\n    );\n  }\n\nAnd this is the output from Babel with ``react`` preset:\n\n.. code-block:: javascript\n\n  const UserInfo = ({\n    users\n  }) =\u003e {\n    if (!users.length) {\n      return /*#__PURE__*/React.createElement(\"p\", null, \"No users\");\n    }\n\n    return /*#__PURE__*/React.createElement(\"div\", null,\n      /*#__PURE__*/React.createElement(\"p\", null, \"Great!\"),\n      /*#__PURE__*/React.createElement(\"p\", null, \"We have \", users.length, \" users!\")\n    );\n  };\n\nMost of the structure is identical, and the HTML tags are transformed to ``React.createElement``\ncalls. That makes sense, the function doesn't produce component instances, instead,\nit produces elements. Elements describe how to configure components or DOM elements.\n\nNow, let's back to SwiftUI. There is the same example:\n\n.. code-block:: swift\n\n  struct UserInfo: View {\n      let users: [User]\n      \n      var body: some View {\n          Group {\n              if users.isEmpty {\n                  Text(\"No users\")\n              } else {\n                  VStack {\n                      Text(\"Great!\")\n                      Text(\"We have \\(users.count) users!\")\n                  }\n              }\n          }\n      }\n  }\n\nAnd this is the actual code represented by it:\n\n.. code-block:: swift\n\n  struct UserInfo: View {\n      let users: [User]\n      \n      var body: some View {\n          let v: _ConditionalContent\u003cText, VStack\u003cTupleView\u003c(Text, Text)\u003e\u003e\u003e\n          if users.isEmpty {\n              v = ViewBuilder.buildEither(first: Text(\"No users\"))\n          } else {\n              v = ViewBuilder.buildEither(second: VStack {\n                  return ViewBuilder.buildBlock(\n                      Text(\"Great!\"),\n                      Text(\"We have \\(users.count) users!\")\n                  )\n              })\n          }\n          return v\n      }\n  }\n\nVoila! All the dynamic structures are replaced by ``ViewBuilder`` method calls. In\nthis way, we can use a complex type to represent the structure. Like ``if``\nstatement will be transformed to ``ViewBuilder.buildEither`` call, and its return\nvalue contains the information of both ``if`` block and ``else`` block.\n\n``ViewBuilder.buildBlock`` is used to represent a child element that contains\nmultiple views.\n\nWith function builders, you can even create your own DSLs. And this year in WWDC20,\nApple released more features based on function builders, like **WidgetKit** and\nSwiftUI **App Structure**.\n\nHow SwiftUI determine when to update a view?\n--------------------------------------------\nAll views in SwiftUI are like **PureComponent** in React by default. That means,\nall the member variables (props) will be used to evaluate the equality, of course\nit's shallow comparison.\n\nWhat if you want to customize the update strategy? If you take a look at the\ndeclaration of ``View`` protocol, you will notice this subtle thing:\n\n.. code-block:: swift\n\n  extension View where Self : Equatable {\n\n      /// Prevents the view from updating its child view when its new value is the\n      /// same as its old value.\n      @inlinable public func equatable() -\u003e EquatableView\u003cSelf\u003e\n  }\n\nSwiftUI provides an ``EquatableView`` to let you achieve that. All you need to do\nis make your view type conform ``Equatable`` and implement the ``==`` function.\nThen wrap it into ``EquatableView`` at the call-site.\n\n.. References:\n\n.. _`Thinking in React Hooks`: https://wattenberger.com/blog/react-hooks\n.. _`[SE-0258] Property Wrappers`: https://github.com/apple/swift-evolution/blob/master/proposals/0258-property-wrappers.md\n.. _`Function builders (draft proposal)`: https://github.com/apple/swift-evolution/blob/9992cf3c11c2d5e0ea20bee98657d93902d5b174/proposals/XXXX-function-builders.md","funding_links":[],"categories":["Others"],"sub_categories":[],"project_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Funixzii%2Fswiftui-for-react-devs","html_url":"https://awesome.ecosyste.ms/projects/github.com%2Funixzii%2Fswiftui-for-react-devs","lists_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Funixzii%2Fswiftui-for-react-devs/lists"}