- DOM Events: 3 phases of event propagation ( Capturing phase - the event goes down from the top. Target phase - the event reaches the target (source) element. Bubbling stage - the event starts to rise.

).

- How to prevent bubbling? (event.stopPropagation(), event.stopImmediatePropagation())

CSS

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- If it comes to css, for some reason they still ask about ways to "center a block in the middle of the screen". In 2k18!

- Preprocessors and their pros/cons relative to each other (this is usually a question about experience and somehow no one asked about postcss)?

- css-modules / styled-components. What is it? Why? Pros and cons?

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