Validate .browserslistrc files and browserslist entries in package.json for syntax errors, deprecated browsers, redundant queries, and best practices.
# Full validation (all rules)
python3 scripts/browserslist_validator.py validate .browserslistrc
# Validate browserslist in package.json
python3 scripts/browserslist_validator.py validate package.json
# Quick syntax-only check
python3 scripts/browserslist_validator.py check .browserslistrc
# Estimate coverage
python3 scripts/browserslist_validator.py coverage .browserslistrc
# Explain each query in human-readable form
python3 scripts/browserslist_validator.py explain .browserslistrc
# JSON output
python3 scripts/browserslist_validator.py validate .browserslistrc --format json
# One-line PASS/WARN/FAIL summary
python3 scripts/browserslist_validator.py validate .browserslistrc --format summary
# Strict mode (warnings become errors)
python3 scripts/browserslist_validator.py validate .browserslistrc --strict
# Target environment
python3 scripts/browserslist_validator.py validate .browserslistrc --env production
| # | Category | Severity | Rule |
|---|---|---|---|
| --- | ---------- | ---------- | ------ |
| S1 | Syntax | E | File not found or unreadable |
| S2 | Syntax | E | Empty config (no queries) |
| S3 | Syntax | E | Invalid query syntax / unknown browser name |
| S4 | Syntax | W | Duplicate queries |
| B1 | Browsers | W | Dead/deprecated browser (IE, Blackberry, etc.) |
| B2 | Browsers | W | Browser with <0.01% global usage |
| B3 | Browsers | E | Browser version does not exist (e.g. Chrome 999) |
| B4 | Browsers | E | Unknown browser name |
| Q1 | Queries | W | Redundant query (covered by broader query) |
| Q2 | Queries | W | Conflicting queries (e.g. > 1% and < 0.5%) |
| Q3 | Queries | E | not dead without any positive query |
| Q4 | Queries | W | Empty result after not negation |
| C1 | Coverage | W | Very low total coverage (<80%) |
| C2 | Coverage | W | Very high coverage (>99.5%, may include dead browsers) |
| C3 | Coverage | I | No mobile browser coverage hint |
| C4 | Coverage | I | No country-specific override detected |
| P1 | Best Practices | W | IE queries present (recommend dropping IE) |
| P2 | Best Practices | W | Unreasonably old versions (last 20 versions) |
| P3 | Best Practices | W | all query used (too broad) |
| P4 | Best Practices | W | Version pinning instead of range (Chrome 90) |
[E]/[W]/[I] severity prefixPASS / WARN / FAIL0 — No errors1 — Errors found (or warnings in --strict mode)2 — File not found or parse error共 1 个版本