JavaScript、Node.JS：无法读写文本文件（异步、等待问题）

Question

I am building a function that edits a PHP file using fs.readFile and fs.writeFile , but the PHP file stays the same. However, when I run the logic at the main function of the node.js file, it does edit the PHP file. The following is the code of my function.

create_page = async (event) => {
    // edits password.php
    const pwd_pg_loc = '/password.php'

    fs.readFile(pwd_pg_loc, 'utf8', async function (err, data) {
        if (err) return console.log(err)
        const result = await data.replace('$password = \`\`;', '$password= \'1234\';')
        fs.writeFile(pwd_pg_loc, result, 'utf8', function (err) {
            if (err) return console.log(err)
        })
    })
})

I think I have async , await problems here. Any advise is appreciated!

Answer 1

async function (err, data)

This looks like you're combining old-school callback semantics (err, data) with Promise semantics.

Probably it should be something like:

const data = await fs.readFile(pwd_pg_loc, 'utf8')

Also:

const result = await data.replace(...

There's no need for await here as data.replace is synchronous.