![]() Using async-await, we can write code that almost reads like synchronous code. ![]() It makes working with asynchronous code a lot easier. async-await is an asynchronous programming structure that got introduced into JavaScript after Promises. JavaScript has a couple of patterns that are used for dealing with the asynchronous program flow, such as callback functions and Promises. This post assumes that you are comfortable using the JavaScript async-await pattern that is used for writing asynchronous programs. When we control a browser without any graphical User Interface (UI), it is said to be running in a headless mode. Puppeteer allows us to control a Chrome (or a Chromium) browser programmatically. It is a well-maintained library that is developed by the teams at Google. The package that we will be using for this purpose is called Puppeteer. ![]() There are many libraries in the JavaScript ecosystem that would allow us to control a browser programmatically. Automating our interactions with the web by programming a browser enables us to build tools that can scrape data from websites, fill out forms for us, take screenshots or download files with a single command. We can control a browser programmatically by using JavaScript. For those cases, we can automate a browser to access a website programmatically. Unfortunately, not every online resource has an API that you can interact with. Manually extracting data can be time-consuming, given the amount of data that is out there. Web scraping is the act of extracting data from a website either by manual or automated means. For example, we can use an API of a money exchange to programmatically fetch the latest prices for a stock without visiting the website. This way, we can consume data on the web without using a web browser. A Web API defines the way we can programmatically access and interact with a remote resource. API is short for Application Programming Interface. You can visit a website using a web browser to do things like checking out social media, getting the latest news, or check stock/cryptocurrency prices.Īnother way of accessing data is to use an API. Most people manually access that data by using a web browser. Internet is a source for all kinds of useful (and useless) data. Web Scraping Using JavaScript and Node.js
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