School Recognition Display CORS Preflight: Diagnose Approved Cross-Origin Data Requests
When a school athletic recognition display fetches athlete profiles, award records, or season standings from an API hosted on a different domain — a district data service at api.district.edu, a third-party hall-of-fame platform, or a records database at a separate subdomain — the browser enforces the Cross-Origin Resource Sharing (CORS) protocol before it allows the response to reach the display’s JavaScript. CORS preflight is the mechanism the browser uses to ask the data server whether the display’s origin is an approved caller: the browser sends an HTTP OPTIONS request first, checks the server’s response headers, and only proceeds with the actual data request if the server explicitly grants permission.
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