createSrcSet method

String createSrcSet(String path, { Map<String, String>? params, int begin = minWidth, int end = maxWidth, int tol = srcsetWidthTolerance, bool disableVariableQuality = false, Iterable<int>? targets, })

Create a srcset given a path and a map of params.

This function creates a dpr based srcset if params contain either:

• a width "w" param, or
• a height "h" and aspect ratio "ar" params

Otherwise, a srcset of width-pairs is created. path - path to the image, i.e. "image/file.png" @param params - map of query parameters @param tol - tolerable amount of width value variation @param disableVariableQuality - flag to toggle variable image

@return srcset attribute string

Implementation

//  output quality.
///
/// @return srcset attribute string
///

String createSrcSet(String path,
    {Map<String, String>? params,
    int begin = minWidth,
    int end = maxWidth,
    int tol = srcsetWidthTolerance,
    bool disableVariableQuality = false,
    Iterable<int>? targets}) {
  final srcsetParams = SplayTreeMap<String, String>.of(params ?? {});
  if (targets?.isNotEmpty == true) {
    return createSrcSetPairs(path, srcsetParams, targets!);
  } else if (isDpr(srcsetParams)) {
    return createSrcSetDPR(path, srcsetParams, disableVariableQuality);
  } else {
    var targets = targetWidths(begin, end, tol);
    return createSrcSetPairs(path, srcsetParams, targets);
  }
}