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The list of origins from which JavaScript code will be granted access to your index. Can contain a list of hosts of the form {protocol}://{fully-qualified-domain-name}[:{port#}], or a single '*' to allow all origins (not recommended).
OptionalmaxThe duration for which browsers should cache CORS preflight responses. Defaults to 5 minutes.
Defines options to control Cross-Origin Resource Sharing (CORS) for an index.