13 Cypress Synchronization - biswajitsundara/Cypress GitHub Wiki

Overview

Cypress is asynchronous in nature as it's a java script/type script product. However cypress team has taken care of it in the backend. Cypress first runs through whole code and puts commands in queue. Once code is in queue, next command in queue will only run after all callbacks of current command are completed, thus we can use above code pattern. So use aliases.
Don't write additional methods for cypress commands to make it synchronous, it will break. For example don't use async await
Don't mix cypress commands and other synchronous commands, use .then() to create sequence
Incase of cypress chained command, it will execute in synchronous way.
However if we chain non cypress commands like jquery etc with cypress commands then it won't run in synchronous way.
Example: console.log is asynchronous so it executes before the cypress test even starts. So use it in conjuction with then command

cypress.promise.all
cypress chainable
bluebird promise