lib: improve argument handling in Blob constructor

Ms2ger · aduh95 · commit 8a24c176486e · 2026-02-28T12:07:22.000+01:00
As specified in WebIDL (<https://webidl.spec.whatwg.org/#js-dictionary>), the fields of a dictionary need to be read in lexicographical order. PR-URL: #61980 Reviewed-By: Jason Zhang <xzha4350@gmail.com> Reviewed-By: Mattias Buelens <mattias@buelens.com> Reviewed-By: René <contact.9a5d6388@renegade334.me.uk> Reviewed-By: Luigi Pinca <luigipinca@gmail.com> Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
diff --git a/lib/internal/blob.js b/lib/internal/blob.js
@@ -149,8 +149,8 @@ class Blob {
     }
     validateDictionary(options, 'options');
     let {
-      type = '',
       endings = 'transparent',
+      type = '',
     } = options ?? kEmptyObject;
 
     endings = `${endings}`;
diff --git a/test/wpt/status/FileAPI/blob.json b/test/wpt/status/FileAPI/blob.json
@@ -10,7 +10,6 @@
         "blobParts not an object: BigInt with BigInt.prototype[Symbol.iterator]",
         "blobParts not an object: Symbol with Symbol.prototype[Symbol.iterator]",
         "Getters and value conversions should happen in order until an exception is thrown.",
-        "options properties should be accessed in lexicographic order.",
         "Arguments should be evaluated from left to right."
       ],
       "flaky": [

Original file line number	Diff line number	Diff line change
`@@ -149,8 +149,8 @@ class Blob {`
`149`	`149`	`}`
`150`	`150`	`validateDictionary(options, 'options');`
`151`	`151`	`let {`
`152`		`- type = '',`
`153`	`152`	`endings = 'transparent',`
	`153`	`+ type = '',`
`154`	`154`	`} = options ?? kEmptyObject;`
`155`	`155`
`156`	`156`	endings = `${endings}`;