From b0a405e356aa9e0cd3ba76af2b5088525d5a3928 Mon Sep 17 00:00:00 2001 From: Cameron McHenry Date: Sun, 22 Sep 2024 14:44:15 -0400 Subject: [PATCH] feat(linter): add unicode sets support to `no-useless-escape` rule --- .../src/rules/eslint/no_useless_escape.rs | 367 +++++++++++++++--- .../src/snapshots/no_useless_escape.snap | 273 +++++++++++++ 2 files changed, 595 insertions(+), 45 deletions(-) diff --git a/crates/oxc_linter/src/rules/eslint/no_useless_escape.rs b/crates/oxc_linter/src/rules/eslint/no_useless_escape.rs index afcb56e16c071..30e7d6e476f4a 100644 --- a/crates/oxc_linter/src/rules/eslint/no_useless_escape.rs +++ b/crates/oxc_linter/src/rules/eslint/no_useless_escape.rs @@ -1,7 +1,10 @@ use memchr::memmem; -use oxc_ast::AstKind; +use oxc_ast::{ast::RegExpFlags, AstKind}; use oxc_diagnostics::OxcDiagnostic; use oxc_macros::declare_oxc_lint; +use oxc_regular_expression::ast::{ + Alternative, Character, CharacterClass, CharacterClassContents, Disjunction, Pattern, Term, +}; use oxc_semantic::NodeId; use oxc_span::Span; @@ -75,12 +78,16 @@ impl Rule for NoUselessEscape { if literal.regex.pattern.len() + literal.regex.flags.iter().count() != literal.span.size() as usize => { - check( - ctx, - node.id(), - literal.span.start, - &check_regexp(literal.span.source_text(ctx.source_text())), - ); + if let Some(pattern) = literal.regex.pattern.as_pattern() { + let unicode_sets = literal.regex.flags.contains(RegExpFlags::V); + let useless_escape_spans = check_pattern(ctx, pattern, unicode_sets); + for span in useless_escape_spans { + let c = span.source_text(ctx.source_text()).chars().last().unwrap(); + ctx.diagnostic_with_fix(no_useless_escape_diagnostic(c, span), |fixer| { + fixer.replace(span, c.to_string()) + }); + } + } } AstKind::StringLiteral(literal) => check( ctx, @@ -130,52 +137,131 @@ fn check(ctx: &LintContext<'_>, node_id: NodeId, start: u32, offsets: &[usize]) const REGEX_GENERAL_ESCAPES: &str = "\\bcdDfnpPrsStvwWxu0123456789]"; const REGEX_NON_CHARCLASS_ESCAPES: &str = "\\bcdDfnpPrsStvwWxu0123456789]^/.$*+?[{}|()Bk"; +const REGEX_CLASSSET_CHARACTER_ESCAPES: &str = "\\bcdDfnpPrsStvwWxu0123456789]q/[{}|()-"; +const REGEX_CLASS_SET_RESERVED_DOUBLE_PUNCTUATOR: &str = "!#$%&*+,.:;<=>?@^`~"; -fn check_regexp(regex: &str) -> Vec { - let mut offsets = vec![]; - let mut in_escape = false; - let mut in_character_class = false; - let mut start_char_class = false; - let mut offset = 1; +fn check_pattern(ctx: &LintContext, pattern: &Pattern, unicode_sets: bool) -> Vec { + let mut spans = vec![]; - // Skip the leading and trailing `/` - let mut chars = regex[1..regex.len() - 1].chars().peekable(); - while let Some(c) = chars.next() { - if in_escape { - in_escape = false; - match c { - '-' if in_character_class - && !start_char_class - && !chars.peek().is_some_and(|c| *c == ']') => - { /* noop */ } - '^' if start_char_class => { /* noop */ } - _ => { - let escapes = if in_character_class { - REGEX_GENERAL_ESCAPES - } else { - REGEX_NON_CHARCLASS_ESCAPES - }; - if !escapes.contains(c) { - offsets.push(offset); - } + visit_terms(pattern, &mut |term, stack| match term { + Term::CharacterClass(class) => { + check_character_class(ctx, class, unicode_sets, &mut spans); + } + Term::Character(ch) => { + let character_class = stack.iter().find_map(|visit| match visit { + Visit::Term(Term::CharacterClass(class)) => Some(class), + Visit::Term(_) => None, + }); + if let Some(span) = check_character(ctx, ch, character_class, unicode_sets) { + spans.push(span); + } + } + _ => (), + }); + + spans +} + +fn check_character_class( + ctx: &LintContext, + character_class: &oxc_allocator::Box, + unicode_sets: bool, + spans: &mut Vec, +) { + for term in &character_class.body { + match term { + CharacterClassContents::Character(ch) => { + if let Some(span) = check_character(ctx, ch, Some(character_class), unicode_sets) { + spans.push(span); } } - } else if c == '/' && !in_character_class { - break; - } else if c == '[' { - in_character_class = true; - start_char_class = true; - } else if c == '\\' { - in_escape = true; - } else if c == ']' { - in_character_class = false; + CharacterClassContents::NestedCharacterClass(nested_class) => { + check_character_class(ctx, nested_class, unicode_sets, spans); + } + _ => (), + } + } +} + +fn check_character( + ctx: &LintContext, + character: &Character, + character_class: Option<&oxc_allocator::Box>, + unicode_sets: bool, +) -> Option { + let char_text = character.span.source_text(ctx.source_text()); + let is_escaped = char_text.starts_with('\\'); + if !is_escaped { + return None; + } + let span = character.span; + let escape_char = char_text.chars().nth(1).unwrap(); + let escapes = if character_class.is_some() { + if unicode_sets { + REGEX_CLASSSET_CHARACTER_ESCAPES } else { - start_char_class = false; + REGEX_GENERAL_ESCAPES } - offset += c.len_utf8(); + } else { + REGEX_NON_CHARCLASS_ESCAPES + }; + if escapes.contains(escape_char) { + return None; } - offsets + if let Some(class) = character_class { + if escape_char == '^' { + /* The '^' character is also a special case; it must always be escaped outside of character classes, but + * it only needs to be escaped in character classes if it's at the beginning of the character class. To + * account for this, consider it to be a valid escape character outside of character classes, and filter + * out '^' characters that appear at the start of a character class. + * (From ESLint source: https://github.com/eslint/eslint/blob/main/lib/rules/no-useless-escape.js) + */ + if class.span.start + 1 == span.start { + return None; + } + } + if unicode_sets { + if REGEX_CLASS_SET_RESERVED_DOUBLE_PUNCTUATOR.contains(escape_char) { + if let Some(prev_char) = ctx.source_text().chars().nth(span.end as usize) { + // Escaping is valid when it is a reserved double punctuator + if prev_char == escape_char { + return None; + } + } + if let Some(prev_prev_char) = ctx.source_text().chars().nth(span.start as usize - 1) + { + if prev_prev_char == escape_char { + if escape_char != '^' { + return None; + } + + // Escaping caret is unnecessary if the previous character is a `negate` caret(`^`). + if !class.negative { + return None; + } + + let caret_index = class.span.start + 1; + if caret_index < span.start - 1 { + return None; + } + } + } + } + } else if escape_char == '-' { + /* The '-' character is a special case, because it's only valid to escape it if it's in a character + * class, and is not at either edge of the character class. To account for this, don't consider '-' + * characters to be valid in general, and filter out '-' characters that appear in the middle of a + * character class. + * (From ESLint source: https://github.com/eslint/eslint/blob/main/lib/rules/no-useless-escape.js) + */ + if class.span.start + 1 != span.start && span.end != class.span.end - 1 { + return None; + } + } + } + + Some(span) } const VALID_STRING_ESCAPES: &str = "\\nrvtbfux\n\r\u{2028}\u{2029}"; @@ -262,6 +348,68 @@ fn check_template(string: &str) -> Vec { offsets } +#[derive(Debug, Clone, Copy)] +enum Visit<'a> { + Term(&'a Term<'a>), +} + +// TODO: Replace with proper visitor pattern for the regex AST when available +/// Calls the given closure on every [`Term`] in the [`Pattern`]. +fn visit_terms<'a, F: FnMut(&'a Term<'a>, &Vec>)>(pattern: &'a Pattern, f: &mut F) { + // initialize visit stack with enough initial capacity so we will not need to reallocate + // in general (most regex patterns will probably not be this many items deep) + let mut stack: Vec = Vec::with_capacity(16); + visit_terms_disjunction(&pattern.body, f, &mut stack); +} + +/// Calls the given closure on every [`Term`] in the [`Disjunction`]. +fn visit_terms_disjunction<'a, F: FnMut(&'a Term<'a>, &Vec>)>( + disjunction: &'a Disjunction, + f: &mut F, + stack: &mut Vec>, +) { + for alternative in &disjunction.body { + visit_terms_alternative(alternative, f, stack); + } +} + +/// Calls the given closure on every [`Term`] in the [`Alternative`]. +fn visit_terms_alternative<'a, F: FnMut(&'a Term<'a>, &Vec>)>( + alternative: &'a Alternative, + f: &mut F, + stack: &mut Vec>, +) { + for term in &alternative.body { + match term { + Term::LookAroundAssertion(lookaround) => { + stack.push(Visit::Term(term)); + f(term, stack); + visit_terms_disjunction(&lookaround.body, f, stack); + stack.pop(); + } + Term::Quantifier(quant) => { + stack.push(Visit::Term(term)); + f(term, stack); + f(&quant.body, stack); + stack.pop(); + } + Term::CapturingGroup(group) => { + stack.push(Visit::Term(term)); + f(term, stack); + visit_terms_disjunction(&group.body, f, stack); + stack.pop(); + } + Term::IgnoreGroup(group) => { + stack.push(Visit::Term(term)); + f(term, stack); + visit_terms_disjunction(&group.body, f, stack); + stack.pop(); + } + _ => f(term, stack), + } + } +} + #[test] fn test() { use crate::tester::Tester; @@ -369,6 +517,61 @@ fn test() { "var foo = /[\\p{ASCII}]/u", "var foo = /[\\P{ASCII}]/u", "`${/\\s+/g}`", + // Carets + "/[^^]/u", // { "ecmaVersion": 2015 }, + // ES2024 + r"/[\q{abc}]/v", // { "ecmaVersion": 2024 }, + r"/[\(]/v", // { "ecmaVersion": 2024 }, + r"/[\)]/v", // { "ecmaVersion": 2024 }, + r"/[\{]/v", // { "ecmaVersion": 2024 }, + r"/[\]]/v", // { "ecmaVersion": 2024 }, + r"/[\}]/v", // { "ecmaVersion": 2024 }, + r"/[\/]/v", // { "ecmaVersion": 2024 }, + r"/[\-]/v", // { "ecmaVersion": 2024 }, + r"/[\|]/v", // { "ecmaVersion": 2024 }, + r"/[\$$]/v", // { "ecmaVersion": 2024 }, + r"/[\&&]/v", // { "ecmaVersion": 2024 }, + r"/[\!!]/v", // { "ecmaVersion": 2024 }, + r"/[\##]/v", // { "ecmaVersion": 2024 }, + r"/[\%%]/v", // { "ecmaVersion": 2024 }, + r"/[\**]/v", // { "ecmaVersion": 2024 }, + r"/[\++]/v", // { "ecmaVersion": 2024 }, + r"/[\,,]/v", // { "ecmaVersion": 2024 }, + r"/[\..]/v", // { "ecmaVersion": 2024 }, + r"/[\::]/v", // { "ecmaVersion": 2024 }, + r"/[\;;]/v", // { "ecmaVersion": 2024 }, + r"/[\<<]/v", // { "ecmaVersion": 2024 }, + r"/[\==]/v", // { "ecmaVersion": 2024 }, + r"/[\>>]/v", // { "ecmaVersion": 2024 }, + r"/[\??]/v", // { "ecmaVersion": 2024 }, + r"/[\@@]/v", // { "ecmaVersion": 2024 }, + "/[\\``]/v", // { "ecmaVersion": 2024 }, + r"/[\~~]/v", // { "ecmaVersion": 2024 }, + r"/[^\^^]/v", // { "ecmaVersion": 2024 }, + r"/[_\^^]/v", // { "ecmaVersion": 2024 }, + r"/[$\$]/v", // { "ecmaVersion": 2024 }, + r"/[&\&]/v", // { "ecmaVersion": 2024 }, + r"/[!\!]/v", // { "ecmaVersion": 2024 }, + r"/[#\#]/v", // { "ecmaVersion": 2024 }, + r"/[%\%]/v", // { "ecmaVersion": 2024 }, + r"/[*\*]/v", // { "ecmaVersion": 2024 }, + r"/[+\+]/v", // { "ecmaVersion": 2024 }, + r"/[,\,]/v", // { "ecmaVersion": 2024 }, + r"/[.\.]/v", // { "ecmaVersion": 2024 }, + r"/[:\:]/v", // { "ecmaVersion": 2024 }, + r"/[;\;]/v", // { "ecmaVersion": 2024 }, + r"/[<\<]/v", // { "ecmaVersion": 2024 }, + r"/[=\=]/v", // { "ecmaVersion": 2024 }, + r"/[>\>]/v", // { "ecmaVersion": 2024 }, + r"/[?\?]/v", // { "ecmaVersion": 2024 }, + r"/[@\@]/v", // { "ecmaVersion": 2024 }, + "/[`\\`]/v", // { "ecmaVersion": 2024 }, + r"/[~\~]/v", // { "ecmaVersion": 2024 }, + r"/[^^\^]/v", // { "ecmaVersion": 2024 }, + r"/[_^\^]/v", // { "ecmaVersion": 2024 }, + r"/[\&&&\&]/v", // { "ecmaVersion": 2024 }, + r"/[[\-]\-]/v", // { "ecmaVersion": 2024 }, + r"/[\^]/v", // { "ecmaVersion": 2024 } ]; let fail = vec![ @@ -424,6 +627,43 @@ fn test() { r"var foo = /\（([^\）\（]+)\）$|\(([^\)\)]+)\)$/;", r#"var stringLiteralWithNextLine = "line 1\…line 2";"#, r"var stringLiteralWithNextLine = `line 1\…line 2`;", + r#""use\ strict";"#, + // spellchecker:off + r#"({ foo() { "foo"; "bar"; "ba\z" } })"#, // { "ecmaVersion": 6 } + // spellchecker:on + // Carets + r"/[^\^]/", + r"/[^\^]/u", // { "ecmaVersion": 2015 }, + // ES2024 + r"/[\$]/v", // { "ecmaVersion": 2024 }, + r"/[\&\&]/v", // { "ecmaVersion": 2024 }, + r"/[\!\!]/v", // { "ecmaVersion": 2024 }, + r"/[\#\#]/v", // { "ecmaVersion": 2024 }, + r"/[\%\%]/v", // { "ecmaVersion": 2024 }, + r"/[\*\*]/v", // { "ecmaVersion": 2024 }, + r"/[\+\+]/v", // { "ecmaVersion": 2024 }, + r"/[\,\,]/v", // { "ecmaVersion": 2024 }, + r"/[\.\.]/v", // { "ecmaVersion": 2024 }, + r"/[\:\:]/v", // { "ecmaVersion": 2024 }, + r"/[\;\;]/v", // { "ecmaVersion": 2024 }, + r"/[\<\<]/v", // { "ecmaVersion": 2024 }, + r"/[\=\=]/v", // { "ecmaVersion": 2024 }, + r"/[\>\>]/v", // { "ecmaVersion": 2024 }, + r"/[\?\?]/v", // { "ecmaVersion": 2024 }, + r"/[\@\@]/v", // { "ecmaVersion": 2024 }, + "/[\\`\\`]/v", // { "ecmaVersion": 2024 }, + r"/[\~\~]/v", // { "ecmaVersion": 2024 }, + r"/[^\^\^]/v", // { "ecmaVersion": 2024 }, + r"/[_\^\^]/v", // { "ecmaVersion": 2024 }, + r"/[\&\&&\&]/v", // { "ecmaVersion": 2024 }, + r"/[\p{ASCII}--\.]/v", // { "ecmaVersion": 2024 }, + r"/[\p{ASCII}&&\.]/v", // { "ecmaVersion": 2024 }, + r"/[\.--[.&]]/v", // { "ecmaVersion": 2024 }, + r"/[\.&&[.&]]/v", // { "ecmaVersion": 2024 }, + r"/[\.--\.--\.]/v", // { "ecmaVersion": 2024 }, + r"/[\.&&\.&&\.]/v", // { "ecmaVersion": 2024 }, + r"/[[\.&]--[\.&]]/v", // { "ecmaVersion": 2024 }, + r"/[[\.&]&&[\.&]]/v", // { "ecmaVersion": 2024 } ]; let fix = vec![ @@ -452,6 +692,43 @@ fn test() { ("let foo = '\\ ';", "let foo = ' ';", None), ("let foo = /\\ /;", "let foo = / /;", None), ("var foo = `\\$\\{{${foo}`;", "var foo = `$\\{{${foo}`;", None), + (r#""use\ strict";"#, r#""use strict";"#, None), + // spellchecker:off + (r#"({ foo() { "foo"; "bar"; "ba\z" } })"#, r#"({ foo() { "foo"; "bar"; "baz" } })"#, None), // { "ecmaVersion": 6 } + // spellchecker:on + // Carets + (r"/[^\^]/", r"/[^^]/", None), + (r"/[^\^]/u", r"/[^^]/u", None), // { "ecmaVersion": 2015 }, + // ES2024 + (r"/[\$]/v", r"/[$]/v", None), // { "ecmaVersion": 2024 }, + (r"/[\&\&]/v", r"/[&\&]/v", None), // { "ecmaVersion": 2024 }, + (r"/[\!\!]/v", r"/[!\!]/v", None), // { "ecmaVersion": 2024 }, + (r"/[\#\#]/v", r"/[#\#]/v", None), // { "ecmaVersion": 2024 }, + (r"/[\%\%]/v", r"/[%\%]/v", None), // { "ecmaVersion": 2024 }, + (r"/[\*\*]/v", r"/[*\*]/v", None), // { "ecmaVersion": 2024 }, + (r"/[\+\+]/v", r"/[+\+]/v", None), // { "ecmaVersion": 2024 }, + (r"/[\,\,]/v", r"/[,\,]/v", None), // { "ecmaVersion": 2024 }, + (r"/[\.\.]/v", r"/[.\.]/v", None), // { "ecmaVersion": 2024 }, + (r"/[\:\:]/v", r"/[:\:]/v", None), // { "ecmaVersion": 2024 }, + (r"/[\;\;]/v", r"/[;\;]/v", None), // { "ecmaVersion": 2024 }, + (r"/[\<\<]/v", r"/[<\<]/v", None), // { "ecmaVersion": 2024 }, + (r"/[\=\=]/v", r"/[=\=]/v", None), // { "ecmaVersion": 2024 }, + (r"/[\>\>]/v", r"/[>\>]/v", None), // { "ecmaVersion": 2024 }, + (r"/[\?\?]/v", r"/[?\?]/v", None), // { "ecmaVersion": 2024 }, + (r"/[\@\@]/v", r"/[@\@]/v", None), // { "ecmaVersion": 2024 }, + (r"/[\`\`]/v", r"/[`\`]/v", None), // { "ecmaVersion": 2024 }, + (r"/[\~\~]/v", r"/[~\~]/v", None), // { "ecmaVersion": 2024 }, + (r"/[^\^\^]/v", r"/[^^\^]/v", None), // { "ecmaVersion": 2024 }, + (r"/[_\^\^]/v", r"/[_^\^]/v", None), // { "ecmaVersion": 2024 }, + (r"/[\&\&&\&]/v", r"/[&\&&\&]/v", None), // { "ecmaVersion": 2024 }, + (r"/[\p{ASCII}--\.]/v", r"/[\p{ASCII}--.]/v", None), // { "ecmaVersion": 2024 }, + (r"/[\p{ASCII}&&\.]/v", r"/[\p{ASCII}&&.]/v", None), // { "ecmaVersion": 2024 }, + (r"/[\.--[.&]]/v", r"/[.--[.&]]/v", None), // { "ecmaVersion": 2024 }, + (r"/[\.&&[.&]]/v", r"/[.&&[.&]]/v", None), // { "ecmaVersion": 2024 }, + (r"/[\.--\.--\.]/v", r"/[.--.--.]/v", None), // { "ecmaVersion": 2024 }, + (r"/[\.&&\.&&\.]/v", r"/[.&&.&&.]/v", None), // { "ecmaVersion": 2024 }, + (r"/[[\.&]--[\.&]]/v", r"/[[.&]--[.&]]/v", None), // { "ecmaVersion": 2024 }, + (r"/[[\.&]&&[\.&]]/v", r"/[[.&]&&[.&]]/v", None), // { "ecmaVersion": 2024 } ]; Tester::new(NoUselessEscape::NAME, pass, fail).expect_fix(fix).test_and_snapshot(); diff --git a/crates/oxc_linter/src/snapshots/no_useless_escape.snap b/crates/oxc_linter/src/snapshots/no_useless_escape.snap index d21f0bd2b9c82..e820cb8829a18 100644 --- a/crates/oxc_linter/src/snapshots/no_useless_escape.snap +++ b/crates/oxc_linter/src/snapshots/no_useless_escape.snap @@ -440,3 +440,276 @@ source: crates/oxc_linter/src/tester.rs · ─ ╰──── help: Replace `\…` with `…`. + + ⚠ eslint(no-useless-escape): Unnecessary escape character ' ' + ╭─[no_useless_escape.tsx:1:5] + 1 │ "use\ strict"; + · ── + ╰──── + help: Replace `\ ` with ` `. + + ⚠ eslint(no-useless-escape): Unnecessary escape character 'z' + ╭─[no_useless_escape.tsx:1:29] + 1 │ ({ foo() { "foo"; "bar"; "ba\z" } }) + · ── + ╰──── + help: Replace `\z` with `z`. + + ⚠ eslint(no-useless-escape): Unnecessary escape character '^' + ╭─[no_useless_escape.tsx:1:4] + 1 │ /[^\^]/ + · ── + ╰──── + help: Replace `\^` with `^`. + + ⚠ eslint(no-useless-escape): Unnecessary escape character '^' + ╭─[no_useless_escape.tsx:1:4] + 1 │ /[^\^]/u + · ── + ╰──── + help: Replace `\^` with `^`. + + ⚠ eslint(no-useless-escape): Unnecessary escape character '$' + ╭─[no_useless_escape.tsx:1:3] + 1 │ /[\$]/v + · ── + ╰──── + help: Replace `\$` with `$`. + + ⚠ eslint(no-useless-escape): Unnecessary escape character '&' + ╭─[no_useless_escape.tsx:1:3] + 1 │ /[\&\&]/v + · ── + ╰──── + help: Replace `\&` with `&`. + + ⚠ eslint(no-useless-escape): Unnecessary escape character '!' + ╭─[no_useless_escape.tsx:1:3] + 1 │ /[\!\!]/v + · ── + ╰──── + help: Replace `\!` with `!`. + + ⚠ eslint(no-useless-escape): Unnecessary escape character '#' + ╭─[no_useless_escape.tsx:1:3] + 1 │ /[\#\#]/v + · ── + ╰──── + help: Replace `\#` with `#`. + + ⚠ eslint(no-useless-escape): Unnecessary escape character '%' + ╭─[no_useless_escape.tsx:1:3] + 1 │ /[\%\%]/v + · ── + ╰──── + help: Replace `\%` with `%`. + + ⚠ eslint(no-useless-escape): Unnecessary escape character '*' + ╭─[no_useless_escape.tsx:1:3] + 1 │ /[\*\*]/v + · ── + ╰──── + help: Replace `\*` with `*`. + + ⚠ eslint(no-useless-escape): Unnecessary escape character '+' + ╭─[no_useless_escape.tsx:1:3] + 1 │ /[\+\+]/v + · ── + ╰──── + help: Replace `\+` with `+`. + + ⚠ eslint(no-useless-escape): Unnecessary escape character ',' + ╭─[no_useless_escape.tsx:1:3] + 1 │ /[\,\,]/v + · ── + ╰──── + help: Replace `\,` with `,`. + + ⚠ eslint(no-useless-escape): Unnecessary escape character '.' + ╭─[no_useless_escape.tsx:1:3] + 1 │ /[\.\.]/v + · ── + ╰──── + help: Replace `\.` with `.`. + + ⚠ eslint(no-useless-escape): Unnecessary escape character ':' + ╭─[no_useless_escape.tsx:1:3] + 1 │ /[\:\:]/v + · ── + ╰──── + help: Replace `\:` with `:`. + + ⚠ eslint(no-useless-escape): Unnecessary escape character ';' + ╭─[no_useless_escape.tsx:1:3] + 1 │ /[\;\;]/v + · ── + ╰──── + help: Replace `\;` with `;`. + + ⚠ eslint(no-useless-escape): Unnecessary escape character '<' + ╭─[no_useless_escape.tsx:1:3] + 1 │ /[\<\<]/v + · ── + ╰──── + help: Replace `\<` with `<`. + + ⚠ eslint(no-useless-escape): Unnecessary escape character '=' + ╭─[no_useless_escape.tsx:1:3] + 1 │ /[\=\=]/v + · ── + ╰──── + help: Replace `\=` with `=`. + + ⚠ eslint(no-useless-escape): Unnecessary escape character '>' + ╭─[no_useless_escape.tsx:1:3] + 1 │ /[\>\>]/v + · ── + ╰──── + help: Replace `\>` with `>`. + + ⚠ eslint(no-useless-escape): Unnecessary escape character '?' + ╭─[no_useless_escape.tsx:1:3] + 1 │ /[\?\?]/v + · ── + ╰──── + help: Replace `\?` with `?`. + + ⚠ eslint(no-useless-escape): Unnecessary escape character '@' + ╭─[no_useless_escape.tsx:1:3] + 1 │ /[\@\@]/v + · ── + ╰──── + help: Replace `\@` with `@`. + + ⚠ eslint(no-useless-escape): Unnecessary escape character '`' + ╭─[no_useless_escape.tsx:1:3] + 1 │ /[\`\`]/v + · ── + ╰──── + help: Replace `\`` with ```. + + ⚠ eslint(no-useless-escape): Unnecessary escape character '~' + ╭─[no_useless_escape.tsx:1:3] + 1 │ /[\~\~]/v + · ── + ╰──── + help: Replace `\~` with `~`. + + ⚠ eslint(no-useless-escape): Unnecessary escape character '^' + ╭─[no_useless_escape.tsx:1:4] + 1 │ /[^\^\^]/v + · ── + ╰──── + help: Replace `\^` with `^`. + + ⚠ eslint(no-useless-escape): Unnecessary escape character '^' + ╭─[no_useless_escape.tsx:1:4] + 1 │ /[_\^\^]/v + · ── + ╰──── + help: Replace `\^` with `^`. + + ⚠ eslint(no-useless-escape): Unnecessary escape character '&' + ╭─[no_useless_escape.tsx:1:3] + 1 │ /[\&\&&\&]/v + · ── + ╰──── + help: Replace `\&` with `&`. + + ⚠ eslint(no-useless-escape): Unnecessary escape character '.' + ╭─[no_useless_escape.tsx:1:14] + 1 │ /[\p{ASCII}--\.]/v + · ── + ╰──── + help: Replace `\.` with `.`. + + ⚠ eslint(no-useless-escape): Unnecessary escape character '.' + ╭─[no_useless_escape.tsx:1:14] + 1 │ /[\p{ASCII}&&\.]/v + · ── + ╰──── + help: Replace `\.` with `.`. + + ⚠ eslint(no-useless-escape): Unnecessary escape character '.' + ╭─[no_useless_escape.tsx:1:3] + 1 │ /[\.--[.&]]/v + · ── + ╰──── + help: Replace `\.` with `.`. + + ⚠ eslint(no-useless-escape): Unnecessary escape character '.' + ╭─[no_useless_escape.tsx:1:3] + 1 │ /[\.&&[.&]]/v + · ── + ╰──── + help: Replace `\.` with `.`. + + ⚠ eslint(no-useless-escape): Unnecessary escape character '.' + ╭─[no_useless_escape.tsx:1:3] + 1 │ /[\.--\.--\.]/v + · ── + ╰──── + help: Replace `\.` with `.`. + + ⚠ eslint(no-useless-escape): Unnecessary escape character '.' + ╭─[no_useless_escape.tsx:1:7] + 1 │ /[\.--\.--\.]/v + · ── + ╰──── + help: Replace `\.` with `.`. + + ⚠ eslint(no-useless-escape): Unnecessary escape character '.' + ╭─[no_useless_escape.tsx:1:11] + 1 │ /[\.--\.--\.]/v + · ── + ╰──── + help: Replace `\.` with `.`. + + ⚠ eslint(no-useless-escape): Unnecessary escape character '.' + ╭─[no_useless_escape.tsx:1:3] + 1 │ /[\.&&\.&&\.]/v + · ── + ╰──── + help: Replace `\.` with `.`. + + ⚠ eslint(no-useless-escape): Unnecessary escape character '.' + ╭─[no_useless_escape.tsx:1:7] + 1 │ /[\.&&\.&&\.]/v + · ── + ╰──── + help: Replace `\.` with `.`. + + ⚠ eslint(no-useless-escape): Unnecessary escape character '.' + ╭─[no_useless_escape.tsx:1:11] + 1 │ /[\.&&\.&&\.]/v + · ── + ╰──── + help: Replace `\.` with `.`. + + ⚠ eslint(no-useless-escape): Unnecessary escape character '.' + ╭─[no_useless_escape.tsx:1:4] + 1 │ /[[\.&]--[\.&]]/v + · ── + ╰──── + help: Replace `\.` with `.`. + + ⚠ eslint(no-useless-escape): Unnecessary escape character '.' + ╭─[no_useless_escape.tsx:1:11] + 1 │ /[[\.&]--[\.&]]/v + · ── + ╰──── + help: Replace `\.` with `.`. + + ⚠ eslint(no-useless-escape): Unnecessary escape character '.' + ╭─[no_useless_escape.tsx:1:4] + 1 │ /[[\.&]&&[\.&]]/v + · ── + ╰──── + help: Replace `\.` with `.`. + + ⚠ eslint(no-useless-escape): Unnecessary escape character '.' + ╭─[no_useless_escape.tsx:1:11] + 1 │ /[[\.&]&&[\.&]]/v + · ── + ╰──── + help: Replace `\.` with `.`.