Simplify dirty tracking

Depend on the native browser support for this.

Author: joeldrapper

src/morphlex.ts

@@ -391,32 +391,31 @@ class Morph {
 	}
 
 	#visitAttributes(from: Element, to: Element): void {
-		const wasDirty = from.hasAttribute("morphlex-dirty")
-		if (wasDirty) {
+		if (from.hasAttribute("morphlex-dirty")) {
 			from.removeAttribute("morphlex-dirty")
 		}
 
 		// First pass: update/add attributes from reference (iterate forwards)
 		for (const { name, value } of to.attributes) {
 			if (name === "value") {
 				if (isInputElement(from) && from.value !== value) {
-					if (from !== this.#skipValuePropertyUpdateFor && (!this.#options.preserveChanges || !wasDirty)) {
+					if (from !== this.#skipValuePropertyUpdateFor && !this.#options.preserveChanges) {
 						from.value = value
 					}
 				}
 			}
 
 			if (name === "selected") {
 				if (isOptionElement(from) && !from.selected) {
-					if (!this.#options.preserveChanges || !wasDirty) {
+					if (!this.#options.preserveChanges) {
 						from.selected = true
 					}
 				}
 			}
 
 			if (name === "checked") {
 				if (isInputElement(from) && !from.checked) {
-					if (!this.#options.preserveChanges || !wasDirty) {
+					if (!this.#options.preserveChanges) {
 						from.checked = true
 					}
 				}
@@ -435,15 +434,15 @@ class Morph {
 			if (!to.hasAttribute(name)) {
 				if (name === "selected") {
 					if (isOptionElement(from) && from.selected) {
-						if (!this.#options.preserveChanges || !wasDirty) {
+						if (!this.#options.preserveChanges) {
 							from.selected = false
 						}
 					}
 				}
 
 				if (name === "checked") {
 					if (isInputElement(from) && from.checked) {
-						if (!this.#options.preserveChanges || !wasDirty) {
+						if (!this.#options.preserveChanges) {
 							from.checked = false
 						}
 					}

test/new/inputs.browser.test.ts

@@ -73,7 +73,7 @@ describe("text input", () => {
 		expect(second.getAttribute("value")).toBe("a")
 	})
 
-	test("morphing updates default while dirty and updates value once clean again", () => {
+	test("morphing updates default while dirty and keeps value dirty", () => {
 		const input = dom(`<input type="text" value="a">`) as HTMLInputElement
 
 		input.value = "b"
@@ -89,7 +89,7 @@ describe("text input", () => {
 		expect(input.defaultValue).toBe("c")
 
 		morph(input, dom(`<input type="text" value="d">`), { preserveChanges: true })
-		expect(input.value).toBe("d")
+		expect(input.value).toBe("c")
 		expect(input.defaultValue).toBe("d")
 	})
 })