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I understand what a CSS expression is, YSlow is reporting that my page is using one:
Grade B on Avoid CSS expressions
There are a total of 1 expression
inline <style> tag #3 (1 expression)
However, I cannot find where this is coming from? I tried searching all my files for the word “expression” (trying to find the expression() function) and am coming up blank. Is there anything else that YSlow could be considering a css expression that I am missing?
YSlow claims that you have an inline style, so at least it is not from a css file. If you can’t find the
<style>in your own html, something else is adding this to your code.This could maybe an external JavaScript, or maybe it comes from an browser extension you added, e.g a developer tool.
In your browser debug console type
document.getElementsByTagName("style")to list all<style>in your generated document