Use data-s9e-livepreview-hash to skip DOM diffing #39
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When
data-s9e-livepreview-hash
is set, the live preview algorithm will use it as a hint to determine whether to skip that entire branch of the DOM. Extensions like MathRen replace plain text with markup, so every time any part of the message is refreshed the fancy KaTeX markup reverts to text, then the live preview algorithm reruns thedata-s9e-livepreview-onupdate
code to change it back to KaTeX then does DOM diffing to see if the live DOM needs to be updated. If you setdata-s9e-livepreview-hash
, it will make a hash of the element's markup before theupdate
event is run so it will only run it if the content actually changes. IOW, it won't runkatex.render()
on every keystroke.https://s9etextformatter.readthedocs.io/JavaScript/Live_preview_attributes/#data-s9e-livepreview-hash