Wait for the `selector` to appear within the element. If at the moment of calling the method the `selector` already exists, the method will return immediately. If the `selector` doesn't appear after the `timeout` milliseconds of waiting, the function will throw.
This method does not work across navigations or if the element is detached from DOM.
**Signature:**
```typescript
class ElementHandle {waitForSelector<SelectorextendskeyofHTMLElementTagNameMap>(selector: Selector, options?: Exclude<WaitForSelectorOptions,'root'>): Promise<ElementHandle<HTMLElementTagNameMap[Selector]> | null>;}
```
## Parameters
| Parameter | Type | Description |
| --- | --- | --- |
| selector | Selector | A [selector](https://developer.mozilla.org/en-US/docs/Web/CSS/CSS_Selectors) of an element to wait for |
Promise which resolves when element specified by selector string is added to DOM. Resolves to `null` if waiting for hidden: `true` and selector is not found in DOM.
## Remarks
The optional parameters in `options` are:
-`visible`: wait for the selected element to be present in DOM and to be visible, i.e. to not have `display: none` or `visibility: hidden` CSS properties. Defaults to `false`.
-`hidden`: wait for the selected element to not be found in the DOM or to be hidden, i.e. have `display: none` or `visibility: hidden` CSS properties. Defaults to `false`.
-`timeout`: maximum time to wait in milliseconds. Defaults to `30000` (30 seconds). Pass `0` to disable timeout. The default value can be changed by using the [Page.setDefaultTimeout()](./puppeteer.page.setdefaulttimeout.md) method.