function waitFor(selector, callback, timeout) {
const element = document.querySelector(selector);
if (element) {
callback(element);
} else {
if (timeout) {
return window.setTimeout(() => {
return window.requestAnimationFrame(() => {
waitFor(selector, callback);
});
}, timeout);
}
return window.requestAnimationFrame(() => {
waitFor(selector, callback);
});
}
}// Example POST method implementation:
async function postData(url = '', data = {}) {
// Default options are marked with *
const response = await fetch(url, {
method: 'POST', // *GET, POST, PUT, DELETE, etc.
mode: 'cors', // no-cors, *cors, same-origin
cache: 'no-cache', // *default, no-cache, reload, force-cache, only-if-cached
credentials: 'same-origin', // include, *same-origin, omit
headers: {
'Content-Type': 'application/json'
// 'Content-Type': 'application/x-www-form-urlencoded',
},
redirect: 'follow', // manual, *follow, error
referrerPolicy: 'no-referrer', // no-referrer, *no-referrer-when-downgrade, origin, origin-when-cross-origin, same-origin, strict-origin, strict-origin-when-cross-origin, unsafe-url
body: JSON.stringify(data) // body data type must match "Content-Type" header
});
return response.json(); // parses JSON response into native JavaScript objects
}
postData('https://example.com/answer', { answer: 42 })
.then(data => {
console.log(data); // JSON data parsed by `data.json()` call
});
Вообще, навевает на "цифровой шум" на старте модуля, который при одновременном запуске нескольких модулей начинает резонировать и уводит блок питания в защиту.