Callbacks are functions passed to other functions and are executed when a specific code runs, so the functions that will be passed will have to finish their actions before being used by the other function.Ī simple illustration can be seen below where we pass the help function as an argument of the cli function. In this article, we will detail how to wait for loop to finish in Node.js (JavaScript) using two methods.īefore we move into Promises, we need to discuss callbacks.

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The fourth and final line installs the selenium-webdriver package as a development dependency (that’s what the save-dev. In the third line, we create a project, passing the -y argument so that Node.js doesn’t ask questions and goes with the defaults. Some of these actions might be synchronous and some can be asynchronous.įor scenarios of asynchronous actions within loops (especially for loops), we need to make sure we allows them finish before we can move on to the next iteration. Async await and concurrent code in Node.js by Piotr Karpala Medium 500 Apologies, but something went wrong on our end. The first two lines create a new directory and change to it. Loop actions can vary, and within the loop, there are different actions that we might work with.

Nodejs sleep await