Node.js Buffer(buffer)
Translation results：
Node.js is a platform built on the Chrome JavaScript runtime.
Node.js is an event-driven I/O server-side JavaScript environment based on Google's V8 engine. The V8 engine executes Javascript very quickly and has very good performance.
Node.js Buffer(buffer)syntax
The JavaScript language itself only has string data types, not binary data types.
But when dealing with TCP streams or file streams, binary data must be used. Therefore, in Node.js, a Buffer class is defined, which is used to create a buffer area specifically for storing binary data.
In Node.js, the Buffer class is a core library released with the Node kernel. The Buffer library brings a method of storing raw data to Node.js, allowing Node.js to process binary data. Whenever you need to process data moved during I/O operations in Node.js, it is possible to use the Buffer library. . Raw data is stored in instances of the Buffer class. A Buffer is similar to an integer array, but it corresponds to a piece of raw memory outside of the V8 heap memory.
Node.js Buffer(buffer)example
const buf = Buffer.from('runoob', 'ascii');
// 输出 72756e6f6f62
console.log(buf.toString('hex'));
// 输出 cnVub29i
console.log(buf.toString('base64'));