fix(js_formatter): correctly handle comments placement for jsx spread expression

CHANGELOG.md

@@ -179,6 +179,10 @@ our [guidelines for writing a good changelog entry](https://github.com/biomejs/b
 
 ### Formatter
 
+#### Bug fixes
+
+- Fix [#2291](https://github.com/biomejs/biome/issues/2291) by correctly handle comment placement for JSX spread attributes and JSX spread children. Contributed by @ah-yu
+
 ### JavaScript APIs
 
 ### Linter

crates/biome_js_formatter/src/jsx/attribute/spread_attribute.rs

@@ -1,5 +1,6 @@
 use crate::prelude::*;
 
+use crate::utils::format_node_without_comments::FormatAnyJsExpressionWithoutComments;
 use biome_formatter::write;
 use biome_js_syntax::{JsxSpreadAttribute, JsxSpreadAttributeFields};
 
@@ -16,8 +17,34 @@ impl FormatNodeRule<JsxSpreadAttribute> for FormatJsxSpreadAttribute {
         } = node.as_fields();
 
         let argument = argument?;
-        let format_inner =
-            format_with(|f| write!(f, [dotdotdot_token.format(), argument.format(),]));
+        let format_inner = format_with(|f| {
+            if f.comments().is_suppressed(argument.syntax()) {
+                write!(
+                    f,
+                    [
+                        dotdotdot_token.format(),
+                        argument.format(),
+                        line_suffix_boundary()
+                    ]
+                )
+            } else {
+                write!(
+                    f,
+                    [
+                        format_leading_comments(argument.syntax()),
+                        dotdotdot_token.format()
+                    ]
+                )?;
+                FormatAnyJsExpressionWithoutComments.fmt(&argument, f)?;
+                write!(
+                    f,
+                    [
+                        format_dangling_comments(argument.syntax()).with_soft_block_indent(),
+                        format_trailing_comments(argument.syntax()),
+                    ]
+                )
+            }
+        });
 
         write!(f, [l_curly_token.format()])?;
 

crates/biome_js_formatter/src/jsx/auxiliary/spread_child.rs

@@ -1,6 +1,7 @@
 use crate::prelude::*;
 use biome_formatter::write;
 
+use crate::utils::format_node_without_comments::FormatAnyJsExpressionWithoutComments;
 use biome_js_syntax::{JsxSpreadChild, JsxSpreadChildFields};
 
 #[derive(Debug, Clone, Default)]
@@ -18,14 +19,33 @@ impl FormatNodeRule<JsxSpreadChild> for FormatJsxSpreadChild {
         let expression = expression?;
 
         let format_inner = format_with(|f| {
-            write!(
-                f,
-                [
-                    dotdotdot_token.format(),
-                    expression.format(),
-                    line_suffix_boundary()
-                ]
-            )
+            if f.comments().is_suppressed(expression.syntax()) {
+                write!(
+                    f,
+                    [
+                        dotdotdot_token.format(),
+                        expression.format(),
+                        line_suffix_boundary()
+                    ]
+                )
+            } else {
+                write!(
+                    f,
+                    [
+                        format_leading_comments(expression.syntax()),
+                        dotdotdot_token.format(),
+                    ]
+                )?;
+                FormatAnyJsExpressionWithoutComments.fmt(&expression, f)?;
+                write!(
+                    f,
+                    [
+                        format_dangling_comments(expression.syntax()).with_soft_block_indent(),
+                        format_trailing_comments(expression.syntax()),
+                        line_suffix_boundary()
+                    ]
+                )
+            }
         });
 
         write!(f, [l_curly_token.format()])?;

crates/biome_js_formatter/src/utils/format_node_without_comments.rs

@@ -0,0 +1,154 @@
+use crate::js::bogus::bogus_expression::FormatJsBogusExpression;
+use crate::js::expressions::array_expression::FormatJsArrayExpression;
+use crate::js::expressions::arrow_function_expression::FormatJsArrowFunctionExpression;
+use crate::js::expressions::assignment_expression::FormatJsAssignmentExpression;
+use crate::js::expressions::await_expression::FormatJsAwaitExpression;
+use crate::js::expressions::bigint_literal_expression::FormatJsBigintLiteralExpression;
+use crate::js::expressions::binary_expression::FormatJsBinaryExpression;
+use crate::js::expressions::boolean_literal_expression::FormatJsBooleanLiteralExpression;
+use crate::js::expressions::call_expression::FormatJsCallExpression;
+use crate::js::expressions::class_expression::FormatJsClassExpression;
+use crate::js::expressions::computed_member_expression::FormatJsComputedMemberExpression;
+use crate::js::expressions::conditional_expression::FormatJsConditionalExpression;
+use crate::js::expressions::function_expression::FormatJsFunctionExpression;
+use crate::js::expressions::import_call_expression::FormatJsImportCallExpression;
+use crate::js::expressions::import_meta_expression::FormatJsImportMetaExpression;
+use crate::js::expressions::in_expression::FormatJsInExpression;
+use crate::js::expressions::instanceof_expression::FormatJsInstanceofExpression;
+use crate::js::expressions::logical_expression::FormatJsLogicalExpression;
+use crate::js::expressions::new_expression::FormatJsNewExpression;
+use crate::js::expressions::new_target_expression::FormatJsNewTargetExpression;
+use crate::js::expressions::null_literal_expression::FormatJsNullLiteralExpression;
+use crate::js::expressions::number_literal_expression::FormatJsNumberLiteralExpression;
+use crate::js::expressions::object_expression::FormatJsObjectExpression;
+use crate::js::expressions::parenthesized_expression::FormatJsParenthesizedExpression;
+use crate::js::expressions::post_update_expression::FormatJsPostUpdateExpression;
+use crate::js::expressions::pre_update_expression::FormatJsPreUpdateExpression;
+use crate::js::expressions::regex_literal_expression::FormatJsRegexLiteralExpression;
+use crate::js::expressions::sequence_expression::FormatJsSequenceExpression;
+use crate::js::expressions::static_member_expression::FormatJsStaticMemberExpression;
+use crate::js::expressions::string_literal_expression::FormatJsStringLiteralExpression;
+use crate::js::expressions::super_expression::FormatJsSuperExpression;
+use crate::js::expressions::template_expression::FormatJsTemplateExpression;
+use crate::js::expressions::this_expression::FormatJsThisExpression;
+use crate::js::expressions::unary_expression::FormatJsUnaryExpression;
+use crate::js::expressions::yield_expression::FormatJsYieldExpression;
+use crate::jsx::expressions::tag_expression::FormatJsxTagExpression;
+use crate::ts::expressions::as_expression::FormatTsAsExpression;
+use crate::ts::expressions::instantiation_expression::FormatTsInstantiationExpression;
+use crate::ts::expressions::non_null_assertion_expression::FormatTsNonNullAssertionExpression;
+use crate::ts::expressions::satisfies_expression::FormatTsSatisfiesExpression;
+use crate::ts::expressions::type_assertion_expression::FormatTsTypeAssertionExpression;
+use crate::{js::expressions::identifier_expression::FormatJsIdentifierExpression, prelude::*};
+use biome_js_syntax::{AnyJsExpression, AnyJsLiteralExpression};
+
+#[derive(Debug, Clone, Default)]
+pub(crate) struct FormatAnyJsExpressionWithoutComments;
+
+impl FormatRule<AnyJsExpression> for FormatAnyJsExpressionWithoutComments {
+    type Context = JsFormatContext;
+    fn fmt(&self, node: &AnyJsExpression, f: &mut JsFormatter) -> FormatResult<()> {
+        match node {
+            AnyJsExpression::AnyJsLiteralExpression(literal_expr) => match literal_expr {
+                AnyJsLiteralExpression::JsBigintLiteralExpression(node) => {
+                    FormatJsBigintLiteralExpression.fmt_node(node, f)
+                }
+                AnyJsLiteralExpression::JsBooleanLiteralExpression(node) => {
+                    FormatJsBooleanLiteralExpression.fmt_node(node, f)
+                }
+                AnyJsLiteralExpression::JsNullLiteralExpression(node) => {
+                    FormatJsNullLiteralExpression.fmt_node(node, f)
+                }
+                AnyJsLiteralExpression::JsNumberLiteralExpression(node) => {
+                    FormatJsNumberLiteralExpression.fmt_node(node, f)
+                }
+                AnyJsLiteralExpression::JsRegexLiteralExpression(node) => {
+                    FormatJsRegexLiteralExpression.fmt_node(node, f)
+                }
+                AnyJsLiteralExpression::JsStringLiteralExpression(node) => {
+                    FormatJsStringLiteralExpression.fmt_node(node, f)
+                }
+            },
+            AnyJsExpression::JsArrayExpression(node) => {
+                FormatJsArrayExpression::default().fmt_node(node, f)
+            }
+            AnyJsExpression::JsArrowFunctionExpression(node) => {
+                FormatJsArrowFunctionExpression::default().fmt_node(node, f)
+            }
+            AnyJsExpression::JsAssignmentExpression(node) => {
+                FormatJsAssignmentExpression.fmt_node(node, f)
+            }
+            AnyJsExpression::JsAwaitExpression(node) => FormatJsAwaitExpression.fmt_node(node, f),
+            AnyJsExpression::JsBinaryExpression(node) => FormatJsBinaryExpression.fmt_node(node, f),
+            AnyJsExpression::JsBogusExpression(node) => FormatJsBogusExpression.fmt(node, f),
+            AnyJsExpression::JsCallExpression(node) => FormatJsCallExpression.fmt_node(node, f),
+            AnyJsExpression::JsClassExpression(node) => FormatJsClassExpression.fmt_node(node, f),
+            AnyJsExpression::JsComputedMemberExpression(node) => {
+                FormatJsComputedMemberExpression.fmt_node(node, f)
+            }
+            AnyJsExpression::JsConditionalExpression(node) => {
+                FormatJsConditionalExpression::default().fmt_node(node, f)
+            }
+            AnyJsExpression::JsFunctionExpression(node) => {
+                FormatJsFunctionExpression::default().fmt_node(node, f)
+            }
+            AnyJsExpression::JsIdentifierExpression(node) => {
+                FormatJsIdentifierExpression.fmt_node(node, f)
+            }
+            AnyJsExpression::JsImportCallExpression(node) => {
+                FormatJsImportCallExpression.fmt_node(node, f)
+            }
+            AnyJsExpression::JsImportMetaExpression(node) => {
+                FormatJsImportMetaExpression.fmt_node(node, f)
+            }
+            AnyJsExpression::JsInExpression(node) => FormatJsInExpression.fmt_node(node, f),
+            AnyJsExpression::JsInstanceofExpression(node) => {
+                FormatJsInstanceofExpression.fmt_node(node, f)
+            }
+            AnyJsExpression::JsLogicalExpression(node) => {
+                FormatJsLogicalExpression.fmt_node(node, f)
+            }
+            AnyJsExpression::JsNewExpression(node) => FormatJsNewExpression.fmt_node(node, f),
+            AnyJsExpression::JsNewTargetExpression(node) => {
+                FormatJsNewTargetExpression.fmt_node(node, f)
+            }
+            AnyJsExpression::JsObjectExpression(node) => FormatJsObjectExpression.fmt_node(node, f),
+            AnyJsExpression::JsParenthesizedExpression(node) => {
+                FormatJsParenthesizedExpression.fmt_node(node, f)
+            }
+            AnyJsExpression::JsPostUpdateExpression(node) => {
+                FormatJsPostUpdateExpression.fmt_node(node, f)
+            }
+            AnyJsExpression::JsPreUpdateExpression(node) => {
+                FormatJsPreUpdateExpression.fmt_node(node, f)
+            }
+            AnyJsExpression::JsSequenceExpression(node) => {
+                FormatJsSequenceExpression.fmt_node(node, f)
+            }
+            AnyJsExpression::JsStaticMemberExpression(node) => {
+                FormatJsStaticMemberExpression.fmt_node(node, f)
+            }
+            AnyJsExpression::JsSuperExpression(node) => FormatJsSuperExpression.fmt_node(node, f),
+            AnyJsExpression::JsTemplateExpression(node) => {
+                FormatJsTemplateExpression.fmt_node(node, f)
+            }
+            AnyJsExpression::JsThisExpression(node) => FormatJsThisExpression.fmt_node(node, f),
+            AnyJsExpression::JsUnaryExpression(node) => FormatJsUnaryExpression.fmt_node(node, f),
+            AnyJsExpression::JsYieldExpression(node) => FormatJsYieldExpression.fmt_node(node, f),
+            AnyJsExpression::JsxTagExpression(node) => FormatJsxTagExpression.fmt_node(node, f),
+            AnyJsExpression::TsAsExpression(node) => FormatTsAsExpression.fmt_node(node, f),
+            AnyJsExpression::TsInstantiationExpression(node) => {
+                FormatTsInstantiationExpression.fmt_node(node, f)
+            }
+            AnyJsExpression::TsNonNullAssertionExpression(node) => {
+                FormatTsNonNullAssertionExpression.fmt_node(node, f)
+            }
+            AnyJsExpression::TsSatisfiesExpression(node) => {
+                FormatTsSatisfiesExpression.fmt_node(node, f)
+            }
+            AnyJsExpression::TsTypeAssertionExpression(node) => {
+                FormatTsTypeAssertionExpression.fmt_node(node, f)
+            }
+        }
+    }
+}

crates/biome_js_formatter/src/utils/mod.rs

@@ -6,6 +6,7 @@ pub mod string_utils;
 
 pub(crate) mod format_class;
 pub(crate) mod format_modifiers;
+pub(crate) mod format_node_without_comments;
 pub(crate) mod function_body;
 pub mod jsx;
 pub(crate) mod member_chain;

crates/biome_js_formatter/tests/specs/jsx/comments.jsx

@@ -2,4 +2,8 @@
 a>;
 
 <a></ /* block1 */ // test
-a>;
+a>;
+
+<div {.../* comment */a}></div>;
+
+<div>{.../* comment */a}</div>;

crates/biome_js_formatter/tests/specs/jsx/comments.jsx.snap

@@ -2,7 +2,6 @@
 source: crates/biome_formatter_test/src/snapshot_builder.rs
 info: jsx/comments.jsx
 ---
-
 # Input
 
 ```jsx
@@ -11,6 +10,10 @@ a>;
 
 <a></ /* block1 */ // test
 a>;
+
+<div {.../* comment */a}></div>;
+
+<div>{.../* comment */a}</div>;
 ```
 
 
@@ -44,6 +47,8 @@ a>;
 	/* block1 */ // test
 	a
 >;
-```
 
+<div {/* comment */ ...a}></div>;
 
+<div>{/* comment */ ...a}</div>;
+```