Various typos/grammar/rewording
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@@ -2,14 +2,14 @@
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//! ---------------------
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//!
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//! This example shows what *not* to do and provides a reason why a given pattern is considered an "AntiPattern". Most
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//! anti-patterns are considered wrong to due performance reasons or violate the "rules" of Dioxus. These rules are
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//! anti-patterns are considered wrong due performance reasons or violate the "rules" of Dioxus. These rules are
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//! borrowed from other successful UI frameworks, and Dioxus is more focused on providing a familiar, ergonomic interface
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//! rather than building new harder-to-misuse patterns.
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//!
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//! In this list we showcase:
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//! - Not adding keys for iterators
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//! - Heavily nested fragments
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//! - Understadning ordering of set_state
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//! - Understanding ordering of set_state
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//! - Naming conventions
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//! - Rules of hooks
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//!
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@@ -21,7 +21,7 @@ use dioxus::prelude::*;
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///
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/// This is considered an anti-pattern for performance reasons. Dioxus will diff your current and old layout and must
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/// take a slower path if it can't correlate old elements with new elements. Lists are particularly susceptible to the
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/// "slow" path, so you're strongly encouraged to provide a unique ID stable between renders. Additionally, providing
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/// "slow" path, so you're strongly encouraged to provide a unique, stable ID between renders. Additionally, providing
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/// the *wrong* keys is even worse - props might be assigned to the wrong components! Keys should be:
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/// - Unique
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/// - Stable
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@@ -47,10 +47,10 @@ static AntipatternNoKeys: FC<NoKeysProps> = |(cx, props)| {
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/// ------------------------------------
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///
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/// This particular antipattern is not necessarily an antipattern in other frameworks but does has a performance impact
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/// in Dioxus apps. Fragments don't mount a physical element to the dom immediately, so Dioxus must recurse into its
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/// children to find a physical dom node. This process is called "normalization". Other frameworks perform an agressive
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/// mutative normalization while Dioxus keeps your VNodes immutable. This means that deepely nested fragments make Dioxus
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/// perform unnecessary work. Prefer one or two levels of fragments / nested components until presenting a true dom element.
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/// in Dioxus apps. Fragments don't mount a physical element to the DOM immediately, so Dioxus must recurse into its
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/// children to find a physical DOM node. This process is called "normalization". Other frameworks perform an agressive
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/// mutative normalization while Dioxus keeps your VNodes immutable. This means that deeply nested fragments make Dioxus
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/// perform unnecessary work. Prefer one or two levels of fragments / nested components until presenting a true DOM element.
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///
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/// Only Component and Fragment nodes are susceptible to this issue. Dioxus mitigates this with components by providing
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/// an API for registering shared state without the ContextProvider pattern.
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@@ -71,7 +71,7 @@ static AntipatternNestedFragments: FC<()> = |(cx, props)| {
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)
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};
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/// Antipattern: Using state after its been updated
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/// Antipattern: Using state after it's been updated
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/// -----------------------------------------------
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///
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/// This is an antipattern in other frameworks, but less so in Dioxus. However, it's important to highlight that use_state
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@@ -82,7 +82,7 @@ static AntipatternNestedFragments: FC<()> = |(cx, props)| {
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/// However, calling set_state will *not* update the current version of state in the component. This should be easy to
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/// recognize from the function signature, but Dioxus will not update the "live" version of state. Calling `set_state`
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/// merely places a new value in the queue and schedules the component for a future update.
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static AntipaternRelyingOnSetState: FC<()> = |(cx, props)| {
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static AntipatternRelyingOnSetState: FC<()> = |(cx, props)| {
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let (state, set_state) = use_state(cx, || "Hello world").classic();
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set_state("New state");
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// This will return false! `state` will *still* be "Hello world"
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@@ -94,28 +94,28 @@ static AntipaternRelyingOnSetState: FC<()> = |(cx, props)| {
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/// ---------------------------
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///
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/// This antipattern is enforced to retain parity with other frameworks and provide useful IDE feedback, but is less
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/// critical than other potential misues. In short:
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/// critical than other potential misuses. In short:
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/// - Only raw elements may start with a lowercase character
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/// - All components must start with an uppercase character
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///
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/// IE: the following component will be rejected when attempted to be used in the rsx! macro
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/// i.e.: the following component will be rejected when attempted to be used in the rsx! macro
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static antipattern_component: FC<()> = |(cx, props)| todo!();
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/// Antipattern: Misusing hooks
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/// ---------------------------
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///
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/// This pattern is an unfortunate one where Dioxus supports the same behavior as in other frameworks. Dioxus supports
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/// "hooks" - IE "memory cells" that allow a value to be stored between renders. This allows other hooks to tap into
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/// a components "memory" without explicitly adding all of its data to a struct definition. In Dioxus, hooks are allocated
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/// This pattern is an unfortunate one where Dioxus replicates the same behavior as other frameworks. Dioxus supports
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/// "hooks" - i.e. "memory cells" that allow a value to be stored between renders. This allows other hooks to tap into
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/// a component's "memory" without explicitly adding all of its data to a struct definition. In Dioxus, hooks are allocated
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/// with a bump arena and then immediately sealed.
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///
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/// This means that hooks may not be misued:
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/// This means that hooks may not be misused:
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/// - Called out of order
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/// - Called in a conditional
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/// - Called in loops or callbacks
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///
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/// For the most part, Rust helps with rule #3 but does not save you from misusing rule #1 or #2. Dioxus will panic
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/// if hooks do not downcast the same data between renders. This is validated by TypeId - and eventually - a custom key.
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/// if hooks do not downcast to the same data between renders. This is validated by TypeId and, eventually, a custom key.
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#[derive(PartialEq, Props)]
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struct MisuedHooksProps {
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should_render_state: bool,
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@@ -131,15 +131,15 @@ static AntipatternMisusedHooks: FC<MisuedHooksProps> = |(cx, props)| {
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}
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};
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/// Antipattern: Downcasting refs and panicing
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/// Antipattern: Downcasting refs and panicking
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/// ------------------------------------------
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///
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/// Occassionally it's useful to get the ref of an element to handle it directly. Elements support downcasting to
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/// Dioxus's virtual element types as well as their true native counterparts. Downcasting to Dioxus' virtual elements
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/// Occasionally it's useful to get the ref of an element to handle it directly. Elements support downcasting to
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/// Dioxus' virtual element types as well as their true native counterparts. Downcasting to Dioxus' virtual elements
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/// will never panic, but downcasting to native elements will fail if on an unsupported platform. We recommend avoiding
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/// publishing hooks and components that deply rely on control over elements using their native `ref`, preferring to
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/// publishing hooks and components that deeply rely on controlling elements using their native `ref`, preferring to
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/// use their Dioxus Virtual Element counterpart instead.
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// This particular code *will panic* due to the unwrap. Try to avoid these types of patterns.
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/// This particular code *will panic* due to the unwrap. Try to avoid these types of patterns.
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/// ---------------------------------
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/// TODO: Get this to compile properly
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/// let div_ref = use_node_ref(&cx);
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+1
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@@ -29,7 +29,7 @@ static Greeting: FC<GreetingProps> = |(cx, props)| {
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cx.render(rsx! {
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div {
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h1 { "Hello, {props.name}!" }
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p { "Welcome to the Diouxs framework" }
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p { "Welcome to the Dioxus framework" }
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br {}
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{cx.children()}
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}
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@@ -1,14 +1,14 @@
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//! Example: Children
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//! -----------------
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//!
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//! Dioxus supports passing children in from the parent. These children are allocated in the parent and just forced
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//! into the child. Components that pass in children may not be safely memoized, though in practice its rare for a
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//! Dioxus supports passing children in from the parent. These children are allocated in the parent and just passed
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//! into the child. Components that pass in children may not be safely memoized, though in practice it's rare for a
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//! change in a parent to not result in a different set of children.
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//!
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//! In Dioxus, children can *only be a list*. Unlike React, you cannot pass in functions or arbitrary data. This is
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//! partially a limitaiton in having static types, but is rather intentional to encourage the use of attributes where
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//! partially a limitation of having static types, but is rather intentional to encourage the use of attributes where
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//! arbitrary child data might normally be used. Check out the `function driven children` example for how to adopt your
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//! React pattern for Dioxus' semantics.
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//! React pattern to Dioxus' semantics.
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//!
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//! Dioxus will let you use the `children` method more than once - and it's semantically *okay* - but you'll likely
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//! ruin your page if you try to clone elements in this way. Under the hood, Dioxus shares a "mounted ID" for each node,
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@@ -3,10 +3,10 @@
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//!
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//! This example shows how to hide or show elements using conditional rendering.
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//!
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//! Often times you might want to display a different UI given some sort of condition. This is called "conditonal rendering".
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//! Oftentimes you might want to display a different UI given some sort of condition. This is called "conditional rendering".
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//! In Dioxus, you can perform conditional rendering with optionals or matching.
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//!
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//! The rsx! and html! macro accepts anything that is `IntoIter<Item = impl IntoVnode>`. Options and Results both implement
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//! The rsx! and html! macros accepts anything that is `IntoIter<Item = impl IntoVnode>`. Options and Results both implement
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//! IntoIter for impl VNode, so you can use option/result for conditional rendering.
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use dioxus::prelude::*;
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@@ -58,7 +58,7 @@ pub static Example1: FC<MyProps1> = |(cx, props)| {
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// or with optional chaining
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{
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props.should_show
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.then(|| rsx!(cx, div {"it is false!"}))
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.then(|| rsx!(cx, div {"it is true!"}))
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.unwrap_or_else(|| rsx!(cx, div {"it is false!"}))
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}
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}
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+11
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@@ -1,21 +1,21 @@
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//! Example: Errror Handling
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//! Example: Error Handling
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//! ------------------------
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//!
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//! Error handling in Dioxus comes in a few flavors. Because Dioxus is a Rust project, Options and Results are obviously
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//! the go-to way of wrapping possibly-errored data. However, if a component fails to "unwrapping," everything will crash,
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//! the go-to way of wrapping possibly-errored data. However, if a component fails when "unwrapping," everything will crash,
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//! the page will deadlock, and your users will be sad.
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//!
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//! So, obviously, you need to handle your errors.
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//!
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//! Fortunately, it's easy to avoid panics, even during quick prototyping.
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//!
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//! Here's a few strategies:
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//! - Leverage the ability to return "None" and propogate None directly
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//! - Instead of propogating "None" manually, use the "?" syntax sugar
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//! - Covert Results into Options with .ok()
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//! Here are a few strategies:
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//! - Leverage the ability to return "None" and propagate None directly
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//! - Instead of propagating "None" manually, use the "?" syntax sugar
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//! - Convert Results into Options with .ok()
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//! - Manually display a separate screen by matching on Options/Results
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//!
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//! There *are* plans to add helpful screens for when apps completely panic in WASM. However, you should really try to
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//! There *are* plans to add helpful screens for when apps completely panic in Wasm. However, you should really try to
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//! avoid panicking.
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use dioxus::prelude::*;
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fn main() {}
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@@ -42,7 +42,7 @@ static App1: FC<()> = |(cx, props)| {
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/// However, it _does_ make the component go blank, which might not be desirable.
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///
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/// This type of error handling is good when you have "selectors" that produce Some/None based on some state that's
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/// already controlled for higher in the tree. IE displaying a "Username" in a component that should only be shown if
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/// already controlled higher in the tree. i.e. displaying a "Username" in a component that should only be shown if
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/// a user is logged in.
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///
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/// Dioxus will throw an error in the console if the None-path is ever taken.
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@@ -59,8 +59,8 @@ static App3: FC<()> = |(cx, props)| match get_data() {
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None => cx.render(rsx!( div { "Failed to load data :(" } )),
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};
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/// For errors that return results, it's possible short-circuit the match-based error handling with `.ok()` which converts
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/// a Result<T, V> into an Option<T> and lets you
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/// For errors that return results, it's possible to short-circuit the match-based error handling with `.ok()` which converts
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/// a Result<T, V> into an Option<T> and lets you abort rendering by early-returning `None`
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static App4: FC<()> = |(cx, props)| {
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let data = get_data_err().ok()?;
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cx.render(rsx!( div { "{data}" } ))
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@@ -68,7 +68,7 @@ static App4: FC<()> = |(cx, props)| {
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/// This is great error handling since it displays a failure state... with context!
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///
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/// Hopefully you never need to disply a screen like this. It's rather bad taste
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/// Hopefully you'll never need to display a screen like this. It's rather bad taste
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static App5: FC<()> = |(cx, props)| match get_data_err() {
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Ok(data) => cx.render(rsx!( div { "{data}" } )),
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Err(c) => cx.render(rsx!( div { "Failed to load data: {c}" } )),
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@@ -3,7 +3,7 @@
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//!
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//! This example shows how to use inline styles in Dioxus components.
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//!
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//! Inline styles function very similar to regular attributes, just grouped together in "style".
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//! Inline styles function very similarly to regular attributes, just grouped together in "style".
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//!
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//! Inline styles in Dioxus are more performant than React since we're able to cache attributes and compare by pointers.
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//! However, it's still not as performant as cascaded styles. Use with care.
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@@ -26,7 +26,7 @@ pub static Example: FC<()> = |(cx, props)| {
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})
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};
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// .... technically the rsx! macro is slightly broken at the moment and alows styles not wrapped in style {}
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// .... technically the rsx! macro is slightly broken at the moment and allows styles not wrapped in style {}
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// I haven't noticed any name collisions yet, and am tentatively leaving this behavior in..
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// Don't rely on it.
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static Example2: FC<()> = |(cx, props)| {
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@@ -8,7 +8,7 @@
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//!
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//! This also makes it easy to write "pull"-style iterators that don't have a known size.
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//!
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//! However, when the size of an iterator needs to be know for display purposes, collecting is fine.
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//! However, when the size of an iterator needs to be known for display purposes, collecting is fine.
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use dioxus::prelude::*;
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@@ -11,7 +11,7 @@ pub static Example: FC<()> = |(cx, props)| {
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cx.render(rsx! {
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ButtonList {}
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NonUpdatingEvents {}
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DisablePropogation {}
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DisablePropagation {}
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})
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};
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@@ -42,13 +42,13 @@ static NonUpdatingEvents: FC<()> = |(cx, props)| {
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})
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};
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static DisablePropogation: FC<()> = |(cx, props)| {
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static DisablePropagation: FC<()> = |(cx, props)| {
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rsx!(cx,
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div {
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onclick: move |_| log::info!("event propogated to the div!")
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onclick: move |_| log::info!("event propagated to the div!")
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button {
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onclick: move |evt| {
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log::info!("Button will allow propogation");
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log::info!("Button will allow propagation");
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}
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}
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}
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@@ -1,10 +1,10 @@
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//! Example: Spread pattern for Components
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//! --------------------------------------
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//!
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//! Dioxus supports the "spread" pattern for manually building a components properties. This is useful when props
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//! Dioxus supports the "spread" pattern for manually building a component's properties. This is useful when props
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//! are passed down from a parent, or it's more ergonomic to construct props from outside the rsx! macro.
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//!
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//! To use the spread pattern, simply pass ".." followed by a Rust epxression. This pattern also supports overriding
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//! To use the spread pattern, simply pass ".." followed by a Rust expression. This pattern also supports overriding
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//! values, using the manual props as the base and then modifying fields specified with non-spread attributes.
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use dioxus::prelude::*;
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@@ -2,7 +2,7 @@
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//! -----------------
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//! This example demonstrates how the use_suspense hook can be used to load and render asynchronous data. Suspense enables
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//! components to wait on futures to complete before rendering the result into VNodes. These VNodes are immediately
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//! available in a suspended" fashion and will automatically propogate to the UI when the future completes.
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//! available in a suspended" fashion and will automatically propagate to the UI when the future completes.
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//!
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//! Currently, suspense futures are non-restartable. In the future, we'll provide more granular control of how to start,
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//! stop, and reset these futures.
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