我想用 fs 读取文件，但到目前为止我做不到，从不显示控制台 2222，为什么看不到控制台？
const inputFileName = "./input.txt";
fs.createWriteStream(outputFileName, { flags: "a" });
const fileStream = fs.createReadStream(inputFileName);
const file = readline.createInterface({
input: fileStream,
crlfDelay: Infinity,
});
for await (const row of file) {
console.log(2222)
}或者我如何在没有 fs 的情况下阅读，不介意，但我需要每行一行
回答1
你应该听 line 事件。这是一个简单的代码。
let fs = require('fs');
let readline = require('readline');
let strInputFileName = 'input.txt';
let fRead = fs.createReadStream(strInputFileName);
fRead.on('end', ()=>{
console.log('end');
});
let objReadline = readline.createInterface({
input: fRead,
});
objReadline.on('line', (strLine)=>{
console.log(strLine)
});回答2
在这里你可以去
function readTextFile(file) {
var rawFile = new XMLHttpRequest();
rawFile.open("GET", file, false); // open with method GET the file with the
rawFile.onreadystatechange = function ()
{
if(rawFile.readyState === 4) // readyState = 4: request finished and response is ready
{
if(rawFile.status === 200) // status 200: "OK"
{
var allText = rawFile.responseText; // Returns the response data
var str_array = allText.split('\n'); //convert to array
// use map function
str_array.map((value, key)=> {
console.log(value); //row per row data
})
}
}
}
rawFile.send(null); //Sends the request to the server Used for GET requests with param null
}
readTextFile("demo.txt"); //pass the file path