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SurveyJS
Open-Source JSON Form Builder to Create Dynamic Forms Right in Your App. With SurveyJS form UI libraries, you can build and style forms in a fully-integrated drag & drop form builder, render them in your JS app, and store form submission data in any backend, inc. PHP, ASP.NET Core, and Node.js.
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InfluxDB
Power Real-Time Data Analytics at Scale. Get real-time insights from all types of time series data with InfluxDB. Ingest, query, and analyze billions of data points in real-time with unbounded cardinality.
We will use httpbin for testing. It offers several endpoints that will respond with headers, IP addresses, and many more.
For the code to work, you will need Node (or nvm) and npm installed. Some systems have it pre-installed. After that, install all the necessary libraries by running npm install.
Cheerio is a "fast, flexible & lean implementation of core jQuery." It lets us find nodes with selectors, get text or attributes, and many other things. We will pass the HTML to cheerio and then query it as we would in a browser environment.
Until now, every page visited was done using axios.get, which can be inadequate in some cases. Say we need Javascript to load and execute or interact in any way with the browser (via mouse or keyboard). While avoiding them would be preferable - for performance reasons -, sometimes there is no other choice. Selenium, Puppeteer, and Playwright are the most used and known libraries. The snippet below shows only the User-Agent, but since it is a real browser, the headers will include the entire set (Accept, Accept-Encoding, etcetera).
Axios is a "promise based HTTP client" that we will use to get the HTML from a URL. It allows several options such as headers and proxies, which we will cover later. If you use TypeScript, they "include TypeScript definitions and a type guard for Axios errors."