process.nextTick promise wrapper
There are cases that process nextTick needs to be used in ES 2017 async functions:
const nextTick = require('tick-promise');
(async () => {
// Some code that uses process.nextTick
await nextTick();
// Do things after process.nextTick
})()
Install
npm install tick-promise
Demo / Use case
For an example we'll use 2 nice node modules, prompts for retrieving user input and simple-node-logger to create our logs:
const prompts = require('prompts');
const log = require('simple-node-logger').createSimpleLogger();
(async () => {
log.info('Asking user age');
const response = await prompts({
type: 'number',
name: 'value',
message: 'How old are you?',
validate: value => value < 18 ? `Nightclub is 18+ only` : true
});
console.log(response); // => { value: 24 }
})();
If we execute this, we'll get something like this:
We can see that the logger text output is next to the prompt output, not good. That happens because simple-node-logger uses process.nextTick to do the output. In order to avoid this, we need to create a promise wrapper for process.nextTick and use it after the logger and before the prompt:
const prompts = require('prompts');
const log = require('simple-node-logger').createSimpleLogger();
const nextTick = require('tick-promise');
(async () => {
log.info('Asking user age');
await nextTick();
const response = await prompts({
type: 'number',
name: 'value',
message: 'How old are you?',
validate: value => value < 18 ? `Nightclub is 18+ only` : true
});
console.log(response); // => { value: 24 }
})();
Now we get the proper output result 👍
