Understanding Readable Streams in NodeJS

What is a readable stream A readable stream is used for production data A stream for program consumption. Our common data production methods include reading disk files, reading network request content, etc. Let’s take a look at the example of stream usage introduced earlier: const rs = fs.createReadStream(filePath); rs is a readable stream, the way to produce data is to read disk files, our common console process.stdin is also a readable stream: process.stdin.pipe(process.stdout); You can print out the console input through a simple sentence, process.stdin The way to generate data is to read user input at the console. Look back at our definition of readable streams: readable streams are streams that produce data for program consumption. Custom readable stream In addition to the fs.CreateReadStream We also often use the src method provided by gulp or vinyl-fs gulp.src(['*.js', ' 39;dist/**/*.scss']) If we want to produce data in a specific way and hand it over to the program for consumption, how do we start? Just two simple steps Inherit the Readable class of the sream module Rewrite _read method, call this.push to put the produced data into the queue to be read The Readable class has completed most of the work to…