need to read metadata from sharePoint is anyone help me

You can use SharePoint REST API in your client side application to read data from SharePoint list.

You have to use REST endpoint in below format:

https://{site_url}/_api/web/lists/GetByTitle('Employee List')/items 

Documentation: Working with lists and list items with REST

Also, check this article Get All Items in SharePoint using REST API. It has links to similar examples to read items using JSOM, CSOM and PowerShell which you can refer and use as per your requirements.

Update:

If you want to fetch site page contents, use endpoint in this format:

https://contoso.sharepoint.com/sites/SiteName/_api/web/lists/getbytitle('Site Pages')/items(1)?$select=Title,CanvasContent1 

Replace 1 with the item ID of your site page from site pages library.

You can get the item ID of your site from site pages library.

1. Go to site pages library using URL like: https://contoso.sharepoint.com/sites/SiteName/SitePages

2. Click on Add Column and then Show or hide columns:

   

3. Select checkbox next to ID, click Apply:

   

4. You will see item ID in site pages library view like:

   

OR

You can get the page content using page name as well using API like:

https://contoso.sharepoint.com/sites/SiteName/_api/web/lists/getbytitle('Site Pages')/items?$select=Title,FileLeafRef,CanvasContent1&$filter=FileLeafRef eq 'Employee.aspx'