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As for XBL: as far as I understand, it was closer to Custom Elements - defined at XML/JS layer instead of with native code. In fact it was so similar that FF de
by adrian17 7y ago
As for XBL: as far as I understand, it was closer to Custom Elements - defined at XML/JS layer instead of with native code. In fact it was so similar that FF developers made a tool that tried to automatically convert an XBL binding to equivalent Custom Element (similar to Python's 2to3).