fix(react): include depth-4 headings in the table of contents

[btea]

Description

Modules documenting class methods at heading depth 4 (e.g., diagnostics_channel, fs, http2) had those methods missing from the sidebar ToC, because extractHeadings capped headings at depth 3.

before	after

Validation

Related Issues

Check List

• I have read the Contributing Guidelines and made commit messages that follow the guideline.
• I have run node --run test and all tests passed.
• I have check code formatting with node --run format:check & node --run lint.
• I've covered new added functionality with unit tests if necessary.

[vercel]

The latest updates on your projects. Learn more about Vercel for GitHub.

Project	Deployment	Actions	Updated
api-docs-tooling	Ready	Preview	Sep 29, 2026 2:45am UTC

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 91.39%. Comparing base (6c484cb) to head (8151b3f).

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #1115   +/-   ##
=======================================
  Coverage   91.38%   91.39%           
=======================================
  Files         249      249           
  Lines       23253    23276   +23     
  Branches     2244     2247    +3     
=======================================
+ Hits        21250    21273   +23     
  Misses       1994     1994           
  Partials        9        9           

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[github-actions]

api-links Generator

Output: 1 file differs

apilinks.json

Expected values to be strictly deep-equal:
+ actual - expected
... Skipped lines

  {
    'Agent.defaultMaxSockets': 'https://github.com/{repository}/blob/HEAD/lib/_http_agent.js#L300',
    'Buffer.alloc': 'https://github.com/{repository}/blob/HEAD/lib/buffer.js#L454',
    'Buffer.allocUnsafe': 'https://github.com/{repository}/blob/HEAD/lib/buffer.js#L473',
    'Buffer.allocUnsafeSlow': 'https://github.com/{repository}/blob/HEAD/lib/buffer.js#L496',
...
    'agent.addRequest': 'https://github.com/{repository}/blob/HEAD/lib/_http_agent.js#L365',
+   'agent.createConnection': 'https://github.com/{repository}/blob/HEAD/lib/_http_agent.js#L304',
-   'agent.createConnection': 'https://github.com/{repository}/blob/HEAD/lib/https.js#L354',
    'agent.createSocket': 'https://github.com/{repository}/blob/HEAD/lib/_http_agent.js#L446',
    'agent.destroy': 'https://github.com/{repository}/blob/HEAD/lib/_http_agent.js#L679',
+   'agent.getName': 'https://github.com/{repository}/blob/HEAD/lib/_http_agent.js#L334',
+   'agent.keepSocketAlive': 'https://github.com/{repository}/blob/HEAD/lib/_http_agent.js#L635',
-   'agent.getName': 'https://github.com/{repository}/blob/HEAD/lib/https.js#L537',
-   'agent.keepSocketAlive': 'https://github.com/{repository}/blob/HEAD/lib/https.js#L506',
    'agent.removeSocket': 'https://github.com/{repository}/blob/HEAD/lib/_http_agent.js#L574',
    'agent.reuseSocket': 'https://github.com/{repository}/blob/HEAD/lib/_http_agent.js#L671',
    'assert.assert': 'https://github.com/{repository}/blob/HEAD/lib/assert.js#L185',
    'asyncResource.asyncId': 'https://github.com/{repository}/blob/HEAD/lib/async_hooks.js#L243',
    'asyncResource.bind': 'https://github.com/{repository}/blob/HEAD/lib/async_hooks.js#L275',
...
    'server.address': 'https://github.com/{repository}/blob/HEAD/lib/net.js#L2776',
+   'server.close': 'https://github.com/{repository}/blob/HEAD/lib/_http_server.js#L697',
+   'server.closeAllConnections': 'https://github.com/{repository}/blob/HEAD/lib/_http_server.js#L707',
+   'server.closeIdleConnections': 'https://github.com/{repository}/blob/HEAD/lib/_http_server.js#L719',
-   'server.close': 'https://github.com/{repository}/blob/HEAD/lib/net.js#L2909',
-   'server.closeAllConnections': 'https://github.com/{repository}/blob/HEAD/lib/https.js#L125',
-   'server.closeIdleConnections': 'https://github.com/{repository}/blob/HEAD/lib/https.js#L127',
    'server.getConnections': 'https://github.com/{repository}/blob/HEAD/lib/net.js#L2871',
    'server.listen': 'https://github.com/{repository}/blob/HEAD/lib/net.js#L2566',
    'server.ref': 'https://github.com/{repository}/blob/HEAD/lib/net.js#L3023',
+   'server.setTimeout': 'https://github.com/{repository}/blob/HEAD/lib/_http_server.js#L735',
-   'server.setTimeout': 'https://github.com/{repository}/blob/HEAD/lib/https.js#L129',
    'server.unref': 'https://github.com/{repository}/blob/HEAD/lib/net.js#L3032',
+   'server[SymbolAsyncDispose]': 'https://github.com/{repository}/blob/HEAD/lib/_http_server.js#L703',
-   'server[SymbolAsyncDispose]': 'https://github.com/{repository}/blob/HEAD/lib/net.js#L2950',
    'server[SymbolAsyncIterator]': 'https://github.com/{repository}/blob/HEAD/lib/net.js#L2957',
    'server[kDeserialize]': 'https://github.com/{repository}/blob/HEAD/lib/net.js#L2487',
    'server[kTransferList]': 'https://github.com/{repository}/blob/HEAD/lib/net.js#L2459',
    'server[kTransfer]': 'https://github.com/{repository}/blob/HEAD/lib/net.js#L2464',
+   'server[undefined]': 'https://github.com/{repository}/blob/HEAD/lib/_http_server.js#L742',
-   'server[undefined]': 'https://github.com/{repository}/blob/HEAD/lib/net.js#L2987',
    'serverresponse._finish': 'https://github.com/{repository}/blob/HEAD/lib/_http_server.js#L262',
    'serverresponse._implicitHeader': 'https://github.com/{repository}/blob/HEAD/lib/_http_server.js#L419',
    'serverresponse.assignSocket': 'https://github.com/{repository}/blob/HEAD/lib/_http_server.js#L312',
    'serverresponse.detachSocket': 'https://github.com/{repository}/blob/HEAD/lib/_http_server.js#L323',
    'serverresponse.statusCode': 'https://github.com/{repository}/blob/HEAD/lib/_http_server.js#L285',

Performance estimate _{(single CI run)}

• Generation time: 3.5% slower (1.42 s → 1.47 s)
• Peak memory: 18.9% lower (440.25 MB → 356.89 MB)

json Generator

Performance estimate _{(single CI run)}

• Generation time: 44.9% slower (6.41 s → 9.29 s)
• Peak memory: 2.1% lower (1.74 GB → 1.70 GB)

legacy-html Generator

Performance estimate _{(single CI run)}

• Generation time: 2.7% faster (42.69 s → 41.55 s)
• Peak memory: 1.9% higher (2.34 GB → 2.39 GB)

legacy-json Generator

Performance estimate _{(single CI run)}

• Generation time: 10.0% slower (7.81 s → 8.59 s)
• Peak memory: 7.0% lower (1.57 GB → 1.46 GB)

llms-txt Generator

Performance estimate _{(single CI run)}

• Generation time: 1.7% slower (7.61 s → 7.74 s)
• Peak memory: 4.0% higher (1.52 GB → 1.59 GB)

orama-db Generator

Output size: 1 file changed · net +153.00 B

File size details

File	Main	PR	Change
orama-db.json	9.54 MB	9.54 MB	+153.00 B (+0.0%)

Performance estimate _{(single CI run)}

• Generation time: 3.4% faster (6.45 s → 6.23 s)
• Peak memory: 8.8% lower (1.76 GB → 1.61 GB)

web Generator

Output size: 49 files changed · net +462.12 KB

File size details

File	Main	PR	Change
all.html	32.97 MB	33.20 MB	+231.06 KB (+0.7%)
http2.html	1.25 MB	1.28 MB	+30.32 KB (+2.4%)
fs.html	2.21 MB	2.24 MB	+26.36 KB (+1.2%)
n-api.html	1.00 MB	1.02 MB	+22.52 KB (+2.2%)
quic.html	924.12 KB	946.34 KB	+22.21 KB (+2.4%)
webstreams.html	535.38 KB	555.37 KB	+19.99 KB (+3.7%)
webcrypto.html	640.93 KB	660.47 KB	+19.54 KB (+3.0%)
diagnostics_channel.html	529.81 KB	540.33 KB	+10.52 KB (+2.0%)
url.html	512.50 KB	521.63 KB	+9.14 KB (+1.8%)
events.html	834.21 KB	841.78 KB	+7.57 KB (+0.9%)
stream.html	1.22 MB	1.23 MB	+6.94 KB (+0.6%)
v8.html	551.12 KB	557.02 KB	+5.90 KB (+1.1%)
stream_iter.html	734.29 KB	740.04 KB	+5.75 KB (+0.8%)
module.html	510.36 KB	515.31 KB	+4.96 KB (+1.0%)
errors.html	530.83 KB	535.58 KB	+4.75 KB (+0.9%)
inspector.html	214.37 KB	217.55 KB	+3.18 KB (+1.5%)
test.html	1.36 MB	1.36 MB	+2.76 KB (+0.2%)
crypto.html	1.96 MB	1.96 MB	+2.40 KB (+0.1%)
readline.html	363.68 KB	365.77 KB	+2.08 KB (+0.6%)
permissions.html	90.04 KB	91.79 KB	+1.75 KB (+1.9%)
worker_threads.html	634.84 KB	636.49 KB	+1.66 KB (+0.3%)
esm.html	187.11 KB	188.76 KB	+1.64 KB (+0.9%)
single-executable-applications.html	159.44 KB	161.08 KB	+1.64 KB (+1.0%)
repl.html	302.99 KB	304.51 KB	+1.52 KB (+0.5%)
util.html	1.21 MB	1.21 MB	+1.46 KB (+0.1%)
zlib.html	949.01 KB	950.25 KB	+1.24 KB (+0.1%)
child_process.html	674.81 KB	675.96 KB	+1.15 KB (+0.2%)
cli.html	631.57 KB	632.70 KB	+1.13 KB (+0.2%)
modules.html	227.47 KB	228.51 KB	+1.04 KB (+0.5%)
async_hooks.html	283.61 KB	284.49 KB	+897.00 B (+0.3%)
dgram.html	299.77 KB	300.55 KB	+800.00 B (+0.3%)
dtls.html	300.38 KB	301.12 KB	+760.00 B (+0.2%)
debugger.html	143.46 KB	144.18 KB	+742.00 B (+0.5%)
tracing.html	126.07 KB	126.79 KB	+740.00 B (+0.6%)
environment_variables.html	37.69 KB	38.34 KB	+666.00 B (+1.7%)
net.html	633.42 KB	634.07 KB	+659.00 B (+0.1%)
report.html	231.42 KB	232.01 KB	+610.00 B (+0.3%)
process.html	1.14 MB	1.14 MB	+588.00 B (+0.0%)
buffer.html	1.75 MB	1.75 MB	+486.00 B (+0.0%)
perf_hooks.html	866.72 KB	867.18 KB	+471.00 B (+0.1%)
tls.html	523.79 KB	524.25 KB	+466.00 B (+0.1%)
packages.html	218.57 KB	218.99 KB	+436.00 B (+0.2%)
vfs.html	191.63 KB	192.03 KB	+410.00 B (+0.2%)
os.html	164.88 KB	165.26 KB	+384.00 B (+0.2%)
sqlite.html	520.05 KB	520.42 KB	+380.00 B (+0.1%)
intl.html	56.42 KB	56.62 KB	+202.00 B (+0.3%)
http.html	1.10 MB	1.10 MB	+191.00 B (+0.0%)
https.html	240.53 KB	240.69 KB	+165.00 B (+0.1%)
addons.html	379.19 KB	379.32 KB	+142.00 B (+0.0%)

Performance estimate _{(single CI run)}

• Generation time: 2.0% faster (66.31 s → 64.97 s)
• Peak memory: 1.1% lower (3.72 GB → 3.68 GB)

[ovflowd]

I'm unsure adding up to level 4 would be a good idea, it would definitely bloat the ToC no?