What's the rationale for having the close button on the left instead of right?

1. Should the close button be on the right or left?
2. Why does Macos have the close button on the left?
3. Where do you put the Close button?
4. What is the purpose of close button?

Should the close button be on the right or left?

The upper right corner of a modal window is the common place for the close button X in desktop experience.

Why does Macos have the close button on the left?

What's the reason the buttons are on the left of the window? it's because most people are right handed and clicking on the left side feels "wrong'. It's counter-intuitive for something as important as closing an interaction window to be on the "wrong" side. So a user is less likely to close a window by accident.

Where do you put the Close button?

A close button controls the whole window, so it should be in the title bar for that window (clearly separated from content). This is normally along the top. Any button that takes you out of a screen (including close) should follow the "next" button convention.

What is the purpose of close button?

(eXit button) Also called a "close" or "exit" button, clicking or tapping the X removes the current window, dialog box or popup message from the screen. It is also used to delete text and graphics.