What do these operators mean?

Question

Pug

I started to study pug, please tell me what these operators mean:
classes += options.type ? ' button_' + options.type : ''
options.text || 'Button'
in Pug.

Answer 1

the same as js
ternary operator
https://developer.mozilla.org/ru/docs/Web/JavaScri...
+=
https://learn.javascript.ru/operators#sokraschyonn...
options.text || 'Button' is a check for a non-empty variable, will return options.text if there is something there or 'Button'
https://learn.javascript.ru/logical-operators#ili-...