from ironpdf import *

# Instantiate Renderer
renderer = ChromePdfRenderer()
 
# Example that change all to red style in JavaScript:
renderer.RenderingOptions.Javascript = "document.querySelectorAll('h1').forEach(function(el){el.style.color='red';})"

# Make sure to use the render options object that you created:
pdf = renderer.RenderHtmlAsPdf("<h1>Happy New Year!</h1>")
pdf.SaveAs("executed_js.pdf")