Promisify a callback-style function, always resolve with [err,val]
npm install promisify-tupleConvert a Node.js-style callback API (err, val) => void to a Promise that resolves to a [err, val] array.
``
npm install --save promisify-tuple
Before:
`js
const fs = require('fs')
function main() {
fs.readFile('./test.js', (err, val) => {
if (err) console.error(err)
else console.log(val)
})
}
main()
`
After:
`js
const fs = require('fs')
const run = require('promisify-tuple')
async function main() {
const [err, val] = await run(fs.readFile)('./test.js')
if (err) console.error(err)
else console.log(val)
}
main()
``