Fixed conditional format corrupting sheet #1305 #1574
Merged
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Summary
I'm using a template for styling, and filling out data with ExcelJS. When my template had conditional formatting enabled on it, opening it and writing the file (even without data being inserted) would corrupt the file and lose styling. While investigating the issue I ran into this comment I tried it and it worked, and since I wasn't able to find a PR mentioning this fix I decided to open one myself.
Test plan
My original template file's conditional formatting:
After being loaded by ExcelJS and rewritten into a different file:
Notes
I understand the README.md mentioned writing tests for all fixes but I'm not really familiar with it, I can write them if someone could point me in the right direction.