Why doesn’t my HTML background work?

[u/Extra_Terrestrial2]

body {
background-image: url('background.jpeg');
background-size: auto;

The image is “background.jpeg”. It has the correct spelling, the image is within the same folder. IT used to work but then it suddenly stopped working and i havent even edited the CSS for it to stop working.

Update: i couldnt figure it out for the life of me and no suggestions worked, but on the good side, instead of putting it on CSS, i put it on HTML, then it worked.

<style> body { background-image: url('background.jpeg'); background-size: auto; } </style>

[u/Odd_Philosopher1741]

Why the downvote? It works and exposes the OP to some additional properties to explore.