Sort __proto__ field before other properties

print.mjs

@@ -197,6 +197,7 @@ export default function print(value, ...args){
 
 	const linesBefore   = [];
 	const linesAfter    = [];
+	const propLines     = [];
 	const recurse       = (v, k, p, f) => print(v, k, opts, refs, p || path, f);
 	const isArrayBuffer = value instanceof ArrayBuffer || "function" === typeof SharedArrayBuffer && value instanceof SharedArrayBuffer;
 	let isArrayLike     = false;
@@ -342,8 +343,15 @@ export default function print(value, ...args){
 	// Identify Number/Math globals so we know when not to identify “magic” numbers
 	flags = (Math === value) << 2 | (Number === value) << 1;
 
+	// Show the `__proto__` object if possible (and requested)
+	if(opts.proto){
+		let proto;
+		try{ proto = value.__proto__; }
+		catch(e){ proto = e; opts = {...opts, proto: false}; }
+		propLines.push(recurse(proto, "__proto__", 0, flags));
+	}
+
 	// Inspect each property we're interested in displaying
-	const propLines = [];
 	for(let prop of props){
 		const desc = Object.getOwnPropertyDescriptor(value, prop);
 
@@ -368,14 +376,6 @@ export default function print(value, ...args){
 		else propLines.push(recurse(desc.value, prop, 0, flags));
 	}
 
-	// Show the `__proto__` object if possible (and requested)
-	if(opts.proto){
-		let proto;
-		try{ proto = value.__proto__; }
-		catch(e){ proto = e; opts = {...opts, proto: false}; }
-		propLines.push(recurse(proto, "__proto__", 0, flags));
-	}
-
 	// Pick an appropriate pair of brackets
 	value = isArrayLike
 		? [punct + "[" + off, "\n", punct + "]" + off]

test/02-properties.mjs

@@ -116,19 +116,19 @@ describe("Property fields", () => {
 			const bar = {name: "Bar"};
 			bar.__proto__ = foo;
 			expect({foo, bar}).to.print(`{
+				__proto__: {
+					Null prototype
+					
+					__proto__: null
+				}
 				foo: {
+					__proto__: -> {root}.__proto__
 					name: "Foo"
-					__proto__: {
-						Null prototype
-						
-						__proto__: null
-					}
 				}
 				bar: {
-					name: "Bar"
 					__proto__: -> {root}.foo
+					name: "Bar"
 				}
-				__proto__: -> {root}.foo.__proto__
 			}`, {proto: true});
 		});
 
@@ -142,17 +142,17 @@ describe("Property fields", () => {
 				},
 			});
 			expect({foo}).to.print(`{
-				foo: {
-					name: "Foo"
-					__proto__: Error {
-						no: "Really"
-					}
-				}
 				__proto__: {
 					Null prototype
 					
 					__proto__: null
 				}
+				foo: {
+					__proto__: Error {
+						no: "Really"
+					}
+					name: "Foo"
+				}
 			}`, {proto: true});
 		});
 	});