Sencha Component Locator is a tool for finding and generating locators for Sencha Ext JS Components. This tool is used in the context of end-to-end testing with Sencha Test, to help with the process of capturing and generating locators for the Component that’s associated with a given element.

The tool can be used on web pages and local files, and it supports both HTML and Ext JS environments.

The first step is to install the Sencha Component Locator extension. Next, open the web page or file that you want to use with the tool. Now, simply click the "Inspect Element" button, and the tool will automatically start capturing the elements that are on the page. Once the tool is finished capturing all the elements, it will display the list of all captured elements, along with the associated Ext JS Component.