fix(precision): support nanoseconds

Add support for nanosecond precision.
Also some minor tooling config changes to test a new thing out.

Signed-off-by: Jonathan Garbee <jonathan@garbee.me>

Author: Garbee

etc/eslintrc.cjs .eslintrc.cjs

@@ -11,6 +11,7 @@ module.exports = {
   ],
   env: {
     'es2020': true,
+    'node': true,
   },
   parserOptions: {
     sourceType: 'module',
@@ -19,6 +20,7 @@ module.exports = {
     'max-len': ['error', {
       code: 60,
       ignoreRegExpLiterals: true,
-    }]
+      ignoreUrls: true,
+    }],
   },
 };

.markdownlint.yaml

@@ -0,0 +1,10 @@
+# Autoformatter friendly markdownlint config (all formatting rules disabled)
+default: true
+blank_lines: false
+bullet: false
+html: false
+indentation: false
+line_length: false
+spaces: false
+url: false
+whitespace: false

.trunk/.gitignore

@@ -0,0 +1,4 @@
+*out
+*logs
+plugins
+user_trunk.yaml

.trunk/trunk.yaml

@@ -0,0 +1,12 @@
+version: 0.1
+cli:
+  version: 0.16.1-beta
+lint:
+  disabled:
+    - prettier
+  enabled:
+    - actionlint@1.6.15
+    - git-diff-check@SYSTEM
+    - gitleaks@8.11.0
+    - markdownlint@0.32.1
+    - eslint@8.22.0

package.json

@@ -7,7 +7,7 @@
   "scripts": {
     "build": "tsc",
     "test": "c8 --config=etc/c8rc.json ava --config=etc/ava.config.mjs",
-    "lint": "eslint --config=etc/eslintrc.cjs --ext=.ts src tests"
+    "lint": "eslint --ext=.ts src tests"
   },
   "author": "Jonathan Garbee <jonathan@garbee.me>",
   "license": "Unlicense",

src/index.ts

@@ -37,13 +37,13 @@ const minutePattern = /(?<minute>[0-5]\d)/;
 const secondsPattern = /(?<seconds>([0-5]\d)|60)/;
 /**
  * Millisesconds have no defined precision.
- * Allowing for up to 8 since this has been seen from Java.
- * It may increase if another language allows for more
- * specificity than that.
- * From 0-99999999.
+ * Allowing for up to 9 since this gets to nanoseconds.
+ * Going beyond nanoseconds seems unreasonable to expect:
+ * https://nickb.dev/blog/iso8601-and-nanosecond-precision-across-languages/
+ * From 0-999999999.
  * The period to denote them is required if MS are present.
  */
-const millisecondsPattern = /(?:\.(?<milliseconds>\d{1,8}))?/;
+const millisecondsPattern = /(?:\.(?<milliseconds>\d{1,9}))?/;
 
 /**
  * Timezone is complex and difficult to break down further