Note that once youve invoked this module, your node program will not terminate. Don’t install entire libraries and don’t copy-paste code, when you can build faster with small reusable modules. Readline allows reading of a stream (such as STDIN) on a line-by-line basis. Use Bit to easily develop, isolate and publish small modules in your different projects. Tip: Easily reuse small modules across your JS projects So with all these executing at speed 100ms, we will see the spinning effect. There are 1423 other projects in the npm registry using readline. Start using readline in your project by running npm i readline. This module is only available in NodeJS, so you can’t use it from the browser. Latest version: 1.3.0, last published: 7 years ago. So, we use the readline#cursorTo API to set the cursor back to the previous cell, so on the next call, the next line type in the array will be written to the same cell. The JavaScript readline module is a module provided by NodeJS so you can create an interactive command-line program that receives user input or read file content. Using this API will make the cursor to advance to the next cell, no we don't want that. Then we write the line type with the API. The function callback will retrieve the current line type from the array using the index we declared previously. We will give a time of 100ms, this is to make it execute the function callback very fast to achieve the spinning effect. Then we will set up a time interval with the setInterval API. We will set up an index variable to hold the current index position in the array. Readline module makes it easier for input and reading the output given by the user. This module wraps up the process standard output and process standard input objects. To do this in JavaScript, first, we will hold the -, \, |, / in an array. readline repl report stream stream/web stringdecoder test timers tls traceevents tty url util v8 vm wasi workerthreads. Readline Module in Node.js allows the reading of input stream line by line. In other words, TypeScript is also NodeJS so you can use any NodeJS module in TypeScript including the readline module. At the end, your TypeScript code once compiled will generate NodeJS code. So all we have to do is to write -, \, |, / in the same cell rapidly. Accepts an options Object that takes the following values: input - the readable stream to listen to (Required). FredDanna You're right but TypeScript is just a language which adds a layer over NodeJS code to add things like type checks. Now if we can do the above pretty quickly we will have a spinning effect in our terminal. We know to spin a line, we start with this -, then anticlockwise, we have \, then | and last /.
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