ng-xlsx-style

Forked from https://github.com/protobi/js-xlsx/ - refer to original documentation there. This project only aims to support generation in browser, not in a node env.

Changes

• remove require statement for cptable to allow this to work in angular projects (and others I suppose)
• remove require statements for fs (only needed for node, not browser)
• remove require statement for crypto (not needed at this time)
• fix require statement for jszip