Add support for removing React properties.

examples/react-remove-properties/.gitignore

@@ -0,0 +1,34 @@
+# See https://help.github.com/articles/ignoring-files/ for more about ignoring files.
+
+# dependencies
+/node_modules
+/.pnp
+.pnp.js
+
+# testing
+/coverage
+
+# next.js
+/.next/
+/out/
+
+# production
+/build
+
+# misc
+.DS_Store
+*.pem
+
+# debug
+npm-debug.log*
+yarn-debug.log*
+yarn-error.log*
+
+# local env files
+.env.local
+.env.development.local
+.env.test.local
+.env.production.local
+
+# vercel
+.vercel

examples/react-remove-properties/README.md

@@ -0,0 +1,27 @@
+# React Remove Properties Example
+
+This example shows how to use the `reactRemoveProperties` config option to remove React properties.
+
+## Preview
+
+Preview the example live on [StackBlitz](http://stackblitz.com/):
+
+[![Open in StackBlitz](https://developer.stackblitz.com/img/open_in_stackblitz.svg)](https://stackblitz.com/github/vercel/next.js/tree/canary/examples/react-remove-properties)
+
+## Deploy your own
+
+Deploy the example using [Vercel](https://vercel.com?utm_source=github&utm_medium=readme&utm_campaign=next-example):
+
+[![Deploy with Vercel](https://vercel.com/button)](https://vercel.com/new/git/external?repository-url=https://github.com/vercel/next.js/tree/canary/examples/react-remove-properties&project-name=react-remove-properties&repository-name=react-remove-properties)
+
+## How to use
+
+Execute [`create-next-app`](https://github.com/vercel/next.js/tree/canary/packages/create-next-app) with [npm](https://docs.npmjs.com/cli/init) or [Yarn](https://yarnpkg.com/lang/en/docs/cli/create/) to bootstrap the example:
+
+```bash
+npx create-next-app --example react-remove-properties react-remove-properties-app
+# or
+yarn create next-app --example react-remove-properties react-remove-properties-app
+```
+
+Deploy it to the cloud with [Vercel](https://vercel.com/new?utm_source=github&utm_medium=readme&utm_campaign=next-example) ([Documentation](https://nextjs.org/docs/deployment)).

examples/react-remove-properties/next.config.js

@@ -0,0 +1,9 @@
+module.exports = {
+  experimental: {
+    reactRemoveProperties: true,
+    // Or, specify a custom list of regular expressions to match properties to remove.
+    // The regexes defined here are processed in Rust so the syntax is different from
+    // JavaScript `RegExp`s. See https://docs.rs/regex.
+    // reactRemoveProperties: { properties: ['^data-custom$'] },
+  },
+}

examples/react-remove-properties/package.json

@@ -0,0 +1,13 @@
+{
+  "private": true,
+  "scripts": {
+    "dev": "next dev",
+    "build": "next build",
+    "start": "next start"
+  },
+  "dependencies": {
+    "next": "latest",
+    "react": "^17.0.2",
+    "react-dom": "^17.0.2"
+  }
+}

examples/react-remove-properties/pages/index.js

@@ -0,0 +1,9 @@
+const Index = () => (
+  <div data-test-id="1" data-custom="1a">
+    <div data-custom="2">
+      <h1 data-testid="3">Hello World!</h1>
+    </div>
+  </div>
+)
+
+export default Index

packages/next-swc/crates/core/Cargo.toml

@@ -25,6 +25,7 @@ swc_ecmascript = { version = "0.87.0", features = ["codegen", "minifier", "optim
 swc_node_base = "0.5.1"
 swc_stylis = "0.28.0"
 tracing = {version = "0.1.28", features = ["release_max_level_off"]}
+regex = "1.5"
 
 [dev-dependencies]
 swc_ecma_transforms_testing = "0.45.0"

packages/next-swc/crates/core/src/lib.rs

@@ -46,12 +46,13 @@ use swc_ecmascript::{
 };
 
 pub mod amp_attributes;
-pub mod disallow_re_export_all_in_page;
 mod auto_cjs;
+pub mod disallow_re_export_all_in_page;
 pub mod hook_optimizer;
 pub mod next_dynamic;
 pub mod next_ssg;
 pub mod page_config;
+pub mod react_remove_properties;
 pub mod remove_console;
 pub mod styled_jsx;
 mod top_level_binding_collector;
@@ -82,6 +83,9 @@ pub struct TransformOptions {
 
     #[serde(default)]
     pub remove_console: Option<remove_console::Config>,
+
+    #[serde(default)]
+    pub react_remove_properties: Option<react_remove_properties::Config>,
 }
 
 pub fn custom_before_pass(file: Arc<SourceFile>, opts: &TransformOptions) -> impl Fold {
@@ -115,6 +119,11 @@ pub fn custom_before_pass(file: Arc<SourceFile>, opts: &TransformOptions) -> imp
                 Either::Left(remove_console::remove_console(config.clone())),
             _ => Either::Right(noop()),
         },
+        match &opts.react_remove_properties {
+            Some(config) if config.truthy() =>
+                Either::Left(react_remove_properties::remove_properties(config.clone())),
+            _ => Either::Right(noop()),
+        },
     )
 }
 

packages/next-swc/crates/core/src/react_remove_properties.rs

@@ -0,0 +1,72 @@
+use regex::Regex;
+use serde::Deserialize;
+use swc_ecmascript::ast::*;
+use swc_ecmascript::visit::{noop_fold_type, Fold};
+
+#[derive(Clone, Debug, Deserialize)]
+#[serde(untagged)]
+pub enum Config {
+    All(bool),
+    WithOptions(Options),
+}
+
+impl Config {
+    pub fn truthy(&self) -> bool {
+        match self {
+            Config::All(b) => *b,
+            Config::WithOptions(_) => true,
+        }
+    }
+}
+
+#[derive(Clone, Debug, Deserialize)]
+pub struct Options {
+    #[serde(default)]
+    pub properties: Vec<String>,
+}
+
+struct RemoveProperties {
+    properties: Vec<Regex>,
+}
+
+impl RemoveProperties {
+    fn should_remove_property(&self, name: &str) -> bool {
+        self.properties.iter().any(|p| p.is_match(name))
+    }
+}
+
+impl Fold for RemoveProperties {
+    noop_fold_type!();
+
+    fn fold_jsx_opening_element(&mut self, mut el: JSXOpeningElement) -> JSXOpeningElement {
+        el.attrs.retain(|attr| match attr {
+            JSXAttrOrSpread::JSXAttr(JSXAttr {
+                name: JSXAttrName::Ident(ident),
+                ..
+            }) if self.should_remove_property(ident.sym.as_ref()) => false,
+            _ => true,
+        });
+        el
+    }
+}
+
+pub fn remove_properties(config: Config) -> impl Fold {
+    let mut properties: Vec<Regex> = match config {
+        Config::WithOptions(x) => x
+            .properties
+            .iter()
+            .map(|pattern| {
+                Regex::new(pattern).unwrap_or_else(|e| {
+                    panic!("error compiling property regex `{}`: {}", pattern, e);
+                })
+            })
+            .collect(),
+        _ => vec![],
+    };
+    if properties.is_empty() {
+        // Keep the default regex identical to `babel-plugin-react-remove-properties`.
+        properties.push(Regex::new(r"^data-test").unwrap());
+    }
+    let remover = RemoveProperties { properties };
+    remover
+}

packages/next-swc/crates/core/tests/fixture.rs

@@ -1,6 +1,7 @@
 use next_swc::{
     amp_attributes::amp_attributes, next_dynamic::next_dynamic, next_ssg::next_ssg,
-    page_config::page_config_test, remove_console::remove_console, styled_jsx::styled_jsx,
+    page_config::page_config_test, react_remove_properties::remove_properties,
+    remove_console::remove_console, styled_jsx::styled_jsx,
 };
 use std::path::PathBuf;
 use swc_common::{chain, comments::SingleThreadedComments, FileName, Mark, Span, DUMMY_SP};
@@ -130,3 +131,31 @@ fn remove_console_fixture(input: PathBuf) {
         &output,
     );
 }
+
+#[fixture("tests/fixture/react-remove-properties/default/**/input.js")]
+fn react_remove_properties_default_fixture(input: PathBuf) {
+    let output = input.parent().unwrap().join("output.js");
+    test_fixture(
+        syntax(),
+        &|_tr| remove_properties(next_swc::react_remove_properties::Config::All(true)),
+        &input,
+        &output,
+    );
+}
+
+#[fixture("tests/fixture/react-remove-properties/custom/**/input.js")]
+fn react_remove_properties_custom_fixture(input: PathBuf) {
+    let output = input.parent().unwrap().join("output.js");
+    test_fixture(
+        syntax(),
+        &|_tr| {
+            remove_properties(next_swc::react_remove_properties::Config::WithOptions(
+                next_swc::react_remove_properties::Options {
+                    properties: vec!["^data-custom$".into()],
+                },
+            ))
+        },
+        &input,
+        &output,
+    );
+}

packages/next-swc/crates/core/tests/fixture/react-remove-properties/custom/simple/input.js

@@ -0,0 +1,7 @@
+export default function Home() {
+  return <div data-test-id="1" data-custom="1a">
+    <div data-custom="2">
+      <h1 data-testid="3">Hello World!</h1>
+    </div>
+  </div>
+}

packages/next-swc/crates/core/tests/fixture/react-remove-properties/custom/simple/output.js

@@ -0,0 +1,11 @@
+export default function Home() {
+    return <div data-test-id="1">
+
+    <div >
+
+      <h1 data-testid="3">Hello World!</h1>
+
+    </div>
+
+  </div>;
+};

packages/next-swc/crates/core/tests/fixture/react-remove-properties/default/simple/input.js

@@ -0,0 +1,7 @@
+export default function Home() {
+  return <div data-test-id="1" data-custom="1a">
+    <div data-custom="2">
+      <h1 data-testid="3">Hello World!</h1>
+    </div>
+  </div>
+}

packages/next-swc/crates/core/tests/fixture/react-remove-properties/default/simple/output.js

@@ -0,0 +1,11 @@
+export default function Home() {
+    return <div data-custom="1a">
+
+    <div data-custom="2">
+
+      <h1 >Hello World!</h1>
+
+    </div>
+
+  </div>;
+};

packages/next-swc/crates/core/tests/full.rs

@@ -58,6 +58,7 @@ fn test(input: &Path, minify: bool) {
                 is_development: true,
                 styled_components: Some(assert_json("{}")),
                 remove_console: None,
+                react_remove_properties: None,
             };
 
             let options = options.patch(&fm);

packages/next/build/swc/options.js

@@ -67,6 +67,7 @@ function getBaseSWCOptions({
         }
       : null,
     removeConsole: nextConfig?.experimental?.removeConsole,
+    reactRemoveProperties: nextConfig?.experimental?.reactRemoveProperties,
   }
 }
 

packages/next/server/config-shared.ts

@@ -131,6 +131,11 @@ export type NextConfig = { [key: string]: any } & {
       | {
           exclude?: string[]
         }
+    reactRemoveProperties?:
+      | boolean
+      | {
+          properties?: string[]
+        }
     styledComponents?: boolean
     swcMinify?: boolean
     cpus?: number