Detect and parse the snapshot JSON from a Facebook Ad Library script tag

Facebook's SSR script tags contain a bundle of many ads' snapshot data. This function locates the "snapshot": occurrence that belongs to the requested ad_id by first finding the ad_id in the raw text and then extracting the nearest "snapshot": JSON object after it.

Usage

detectmysnap(rawhtmlascharacter, ad_id = NULL)

Arguments

rawhtmlascharacter

Raw HTML content as character string.

ad_id

Character string. The Facebook ad ID to find in the bundle. When provided, the function extracts only the snapshot belonging to this ad. When NULL, extracts the first snapshot found (legacy behavior).

Value

A parsed JSON object (list).

Details

Falls back to the original split-based approach when no ad_id is provided.

See also

get_ad_snapshots() which calls this function internally.