I have the following javascript code
let run = true
while (run){
await page.waitFor(1000);
timer++;
console.log('timer',timer);
//here it is necessary to somehow catch user input and end the cycle
if(input == true){
run = false;
}
}
Ctrl + C completes the program fully, and I would only like to exit this cycle
Here is an example of an infinite loop without blocking Event Loop
Break while loop happens when esc is pressed
Program terminate with ctrl + c
const sleep = require('await-sleep');
let run = true;
let timer = 0;
readline.emitKeypressEvents(process.stdin);
process.stdin.setRawMode(true);
process.stdin.on('keypress', (str, key) => {
console.log(str, key, run);
// Conditions on key
if(key.name == 'escape'){
run = false;
}
if(key.name == 'c' && key.ctrl == true){
process.exit(1);
}
})
async function init(){
while (run){
await sleep(1000);
timer++;
console.log('timer',timer);
}
}
init()
You can do this using readline and raw mode
const readline = require('readline');
readline.emitKeypressEvents(process.stdin);
process.stdin.setRawMode(true);
process.stdin.on('keypress', (str, key) => {
// Conditions on key
input = true;
})
// You can start your loop here
A note on enabling raw mode:
When in raw mode, input is always available character-by-character, not including modifiers. Additionally, all special processing of characters by the terminal is disabled, including echoing input characters. CTRL+C will no longer cause a SIGINT when in this mode.
You may want to set a key for exit the program correctly
