Question on base64 strings in source

[alj1s]

Looking at the source code link on https://html2canvas.hertzen.com/ I can see there are some base64 strings that look to come from some utility libraries by the same author (css-line-break and text-segmentation) and I'd like to better understand what they are for.

We are interested in using this library but these base64 strings have been flagged as a concern for security - can someone advise and help me better understand what these are doing and why they are required

[niklasvh]

They store a trie for the line break rules as defined in https://github.com/niklasvh/css-line-break/blob/master/src/LineBreak.txt which are used to determine where it is possible to perform a line break.