7. Developer Fundamental 5 #

Created Monday 13 July 2020

FIXME - this page has wrong information, correct it.

• Critical Rendering Path
• DOM made the whole process of handling everything on the webpage very easy.
• But it has a few problems:
  1. Reflow - The DOM tree needs to be remade, all elements have to be traversed again.
  2. Repaint - The visual elements like outline, color etc are changed in the CSSOM tree.
• Note: Reflow is expensive as compared to Repaint.
• We want to minimize DOM manipulation and events.

React.js helps in achieving these goals.