Need extParams for vector source

[scadergit]

Unless I'm missing the implementation, I don't see the ability to add parameters to vector-source service requests in the way that wms-source can using extParams. We have to provide an a token to certain service requests, and cannot without this feature for vector sources.

Appreciate the help.

[ghettovoice]

Hello @scadergit , with vector sources you can define append custom get parameters to the url string. Or generate url dynamically in runtime with url function, just replace url property with a function:

(extent, resolution, projection) => {
    // build url string
    return url
 }

Or finally provide custom loader function:

async (extent, resolution, projection) => {
   const r = await fetch('//path/to/features')
   const data = await r.text()

   // if returned features data is known gis format
   // and you set this format factory to the vl-source-vector
   // you can just return raw data here
   return data

   // or parse raw data yourself, then return GeoJSONFeature[] or ol/Feature[]
    return features
}

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