Event: composedPath() method
============================

Baseline Widely available
-------------------------

This feature is well established and works across many devices and browser versions. It’s been available across browsers since January 2020.

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 The **`composedPath()`** method of the `Event`
 interface returns the event's path which is an array of the objects on which listeners
 will be invoked. This does not include nodes in shadow trees if the shadow root was
 created with its `ShadowRoot.mode` closed.

Syntax
------


```js
const composed = Event.composedPath()
```

### Parameters

None.

### Return value

 An array of `EventTarget` objects representing the objects on which an
 event listener will be invoked.

Examples
--------

 In the following example, which you can try out at https://mdn.github.io/web-components-examples/composed-composed-path/, we define two trivial custom
 elements, `<open-shadow>` and `<closed-shadow>`, both
 of which take the contents of their text attribute and insert them into the element's
 shadow DOM as the text content of a `<p>` element. The only difference
 between the two is that their shadow roots are attached with their modes set to
 `open` and `closed` respectively.


```js
customElements.define(
  "open-shadow",
  class extends HTMLElement {
    constructor() {
      super();

      const pElem = document.createElement("p");
      pElem.textContent = this.getAttribute("text");

      const shadowRoot = this.attachShadow({ mode: "open" });
      shadowRoot.appendChild(pElem);
    }
  },
);

customElements.define(
  "closed-shadow",
  class extends HTMLElement {
    constructor() {
      super();

      const pElem = document.createElement("p");
      pElem.textContent = this.getAttribute("text");

      const shadowRoot = this.attachShadow({ mode: "closed" });
      shadowRoot.appendChild(pElem);
    }
  },
);
```


We then insert one of each element into our page:


```html
<open-shadow text="I have an open shadow root"></open-shadow>
<closed-shadow text="I have a closed shadow root"></closed-shadow>
```


Then include a click event listener on the `<html>` element:


```js
document.querySelector("html").addEventListener("click", (e) => {
  console.log(e.composed);
  console.log(e.composedPath());
});
```


 When you click on the `<open-shadow>` element and then the
 `<closed-shadow>` element, you'll notice two things. First, the
 `composed` property returns `true` because the `click`
 event is always able to propagate across shadow boundaries. Second, you'll notice a
 difference in the value of `composedPath` for the two elements. The
 `<open-shadow>` element's composed path is this:
```

Array [ p, ShadowRoot, open-shadow, body, html, HTMLDocument https://mdn.github.io/web-components-examples/composed-composed-path/, Window ]
```


Whereas the `<closed-shadow>` element's composed path is a follows:
```

Array [ closed-shadow, body, html, HTMLDocument https://mdn.github.io/web-components-examples/composed-composed-path/, Window ]
```


 In the second case, the event listeners only propagate as far as the
 `<closed-shadow>` element itself, but not to the nodes inside the
 shadow boundary.

Specifications
--------------

| Specification |
| --- |
| DOM Standard # ref-for-dom-event-composedpath① |

Browser compatibility
---------------------

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