var links = document.querySelectorAll('.class-name')
Array.prototype.slice.call(links).forEach(function(link) {
link.classList.remove('class-name')
})<button onclick="cll(event, '#rew')">Open</button>
<script>
function cll(event, selector) {
var form = document.querySelector(selector)
if (form.style.display == "none") {
form.style.display = "block"
} else {
form.style.display = "none"
}
event.target.textContent = "New button text"
}
</script>var socket = new WebSocket('ws://javascript.ru/ws')
socket.onopen = function() {
console.log('Соединение установлено.')
}
socket.onclose = function(event) {
if (event.wasClean) {
console.log('Соединение закрыто чисто')
} else {
console.log('Обрыв соединения') // например, "убит" процесс сервера
}
console.log('Код: ' + event.code + ' причина: ' + event.reason)
}
socket.onmessage = function(event) {
console.log('Получены данные:', event.data)
}
socket.onerror = function(error) {
console.log('Ошибка:', error.message)
alert(" " + )
}// Returns a function, that, as long as it continues to be invoked, will not
// be triggered. The function will be called after it stops being called for
// N milliseconds. If `immediate` is passed, trigger the function on the
// leading edge, instead of the trailing.
function debounce(func, wait, immediate) {
var timeout;
return function() {
var context = this, args = arguments;
var later = function() {
timeout = null;
if (!immediate) func.apply(context, args);
};
var callNow = immediate && !timeout;
clearTimeout(timeout);
timeout = setTimeout(later, wait);
if (callNow) func.apply(context, args);
};
};var myEfficientFn = debounce(function() {
// All the taxing stuff you do
}, 250);
window.addEventListener('resize', myEfficientFn);{
"name": "Root",
"childs": [
{
"name": "First"
},
{
"name": "Second",
"childs": [{...} , {...}, {...}]
},
{
"name": "Third"
}
]
}function isTouchDevice() {
return 'ontouchstart' in window // works on most browsers
|| navigator.maxTouchPoints; // works on IE10/11 and Surface
}