Retrieve online JSON data

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@mloiz

…, what are the equivalents of getJSONObject() and getJSONArray() from Processing?

1. getJSONObject(): use the dot . accessor operator, followed by the name of the property:
   const num = jsonObj.response.numFound;
2. getJSONArray(): use the brackets [] accessor operator, plus the desired index:
   const gotId4 = jsonObj.facet_counts.facet_fields.structHasAuthIdHal_fs[3];