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in Technique[技术] by (71.8m points)

node中readFile和writeFile的执行顺序

fs.readFile('./test.txt',(err,data)=>{
    console.log('读取成功');
})
fs.writeFile('./test.txt','测试',(obj)=>{
    console.log('写入成功');
})

如上面代码,会先执行写入然后再执行读取操作,请问这是为什么

fs.writeFile('./test.txt','测试',(obj)=>{
    console.log('写入成功1');
})
fs.writeFile('./test.txt','测试',(obj)=>{
    console.log('写入成功2');
})

这里的代码反复运行会发现writeFile是异步执行的,但是为什么每次都是执行完writeFile再执行readFile~~~~


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Welcome To Ask or Share your Answers For Others

1 Answer

0 votes
by (71.8m points)

readFile & writeFile 都是异步的, 经测试也并不都是先执行完writeFile


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