feat: add supportPassiveEventListener

src/index.ts

@@ -24,3 +24,4 @@ export { default as isUndefined } from './isUndefined'
 export { default as noop } from './noop'
 export { default as reduce } from './reduce'
 export { default as repeat } from './repeat'
+export { default as supportPassiveEventListener } from './supportPassiveEventListener'

src/supportPassiveEventListener.ts

@@ -0,0 +1,21 @@
+let isSupportPassiveEventListener: boolean | undefined
+
+/**
+ * 检测是否支持 passive 模式的事件监听。
+ *
+ * @returns 是（true）或否（false）
+ */
+export default function supportPassiveEventListener(): boolean {
+  if (isSupportPassiveEventListener === undefined) {
+    isSupportPassiveEventListener = false
+    try {
+      const options = Object.defineProperty({}, 'passive', {
+        get() {
+          isSupportPassiveEventListener = true
+        }
+      })
+      window.addEventListener('test', null, options)
+    } catch (err) {}
+  }
+  return isSupportPassiveEventListener
+}

test/index.test.ts

@@ -410,3 +410,9 @@ describe('forOwn', () => {
     expect(arr).toEqual([])
   })
 })
+
+describe('supportPassiveEventListener', () => {
+  test('不支持', () => {
+    expect(vtils.supportPassiveEventListener()).toBeFalsy()
+  })
+})