Can you make a function wait until a variable is set by another function? This is my example:
function setvar(){
//some process that may take a while
myvar = 'value';
}
const promise1 = new Promise((resolve, reject) => {
resolve(myvar);
});
promise1.then((value) => {
console.log(value);
});
this doesnt seem to work, the function begins even if the variable is not ready. What should I do? I dont want settimeout or setinterval because I dont know exactly how long it is going to take each time.
In the promise you'll need create a loop that would check if variable was set:
var myvar;
function setvar(){
//some process that may take a while
myvar = 'value';
}
const promise1 = new Promise((resolve, reject) => {
const loop = () => myvar !== undefined ? resolve(myvar) : setTimeout(loop)
loop();
});
promise1.then((value) => {
console.log(value);
});
setTimeout(setvar, 2000);