📜  Node.js Stream readable.readableFlowing 属性

📅  最后修改于: 2022-05-13 01:56:31.193000             🧑  作者: Mango

Node.js Stream readable.readableFlowing 属性

可读流中的readable.readableFlowing 属性,用于检查流是否处于流动模式。

句法:

readable.readableFlowing 

返回值:如果流处于流动模式,则返回 true,否则返回 false。

下面的示例说明了 Node.js 中readable.readableFlowing 属性的使用:

示例 1:

// Node.js program to demonstrate the     
// readable.readableFlowing Property  
  
// Include fs module
var fs = require("fs");
var data = '';
  
// Create a readable stream
var readerStream = fs.createReadStream('input.txt');
  
// Handling data event
readerStream.on('data', function(chunk) {
   data += chunk;
});
  
// Calling readableFlowing property
readerStream.readableFlowing;

输出:

true

示例 2:

// Node.js program to demonstrate the     
// readable.readableFlowing Property  
  
// Include fs module
const fs = require("fs");
  
// Constructing readable stream
const readable = fs.createReadStream("input.txt");
  
// Instructions for reading data
readable.on('readable', () => {
  let chunk;
  
  // Using while loop and calling
  // read method with parameter
  while (null !== (chunk = readable.read())) {
  
    // Displaying the chunk
    console.log(`read: ${chunk}`);
  }
});
  
// Calling readable.readableFlowing
// Property
readable.readableFlowing;

输出:

false

参考: https://nodejs.org/api/stream.html#stream_readable_readableflowing。