feat: add conditional style attributes

Author: fabianmichael

README.md

@@ -139,6 +139,9 @@ $attr ??= [];
 ?>
 <button <?= attributes([
     'role' => 'button',
+    'style' => [
+      'font-size: 2rem;' => ($size === 'large'),
+    ],
 ])->class([
     'button',
     "button--{$size}",

src/Attributes.php

@@ -154,13 +154,29 @@ public static function normalizeClassValue(array|string|null $classes): ?string
 		return implode(' ', array_unique($value));
 	}
 
+		/**
+	 * normalizes an array of class names to a string, e.g.
+	 * array(['font-size: 1rem', 'color: red' => false]) => "font-size: 1rem;"
+	 * array(['font-size: 1rem', 'color: red' => true]) => "font-size: 1rem; color: red"
+	 */
 	public static function normalizeStyleValue(array|string|null $styles): ?string
 	{
-		// if (is_null($styles)) {
-		// 	return null;
-		// }
+		if (is_null($styles)) {
+			return null;
+		}
+
+		$styles = A::wrap($styles);
+		$value = [];
+
+		foreach ($styles as $key => $property) {
+			if (is_numeric($key)) {
+				$value[] = $property;
+			} elseif ($property) {
+				$value[] = $key;
+			}
+		}
 
-		return is_array($styles) ? implode('; ', $styles) : $styles;
+		return implode('; ', array_map(fn($v) => trim($v, '; '), $value));
 	}
 
 	public function set(string $name, mixed $value): static

tests/AttributesTest.php

@@ -158,6 +158,20 @@ public function testAttributesWithClassesArray(): void
 		$this->assertSame((string) $attr, 'class="foo bar" foo="bar"');
 	}
 
+	public function testAttributesWithStylesArray(): void
+	{
+		$attr = new Attributes([
+			'foo' => 'bar',
+			'style' => [
+				'font-size: 1rem;',
+				'line-height: 1.2' => true,
+				'line-height: 1.5' => false,
+			]
+		]);
+
+		$this->assertSame((string) $attr, 'foo="bar" style="font-size: 1rem; line-height: 1.2"');
+	}
+
 	public function testMerge(): void
 	{
 		$attr = new Attributes(foo: 'bar');