add event listener to multiple element in JS
document.querySelectorAll('.some-class').forEach(item => {
item.addEventListener('click', event => {
//handle click
})
})add event listener to multiple element in JS
document.querySelectorAll('.some-class').forEach(item => {
item.addEventListener('click', event => {
//handle click
})
})how to add multiple event listener in javascript
// events and args should be of type Array
function addMultipleListeners(element,events,handler,useCapture,args){
if (!(events instanceof Array)){
throw 'addMultipleListeners: '+
'please supply an array of eventstrings '+
'(like ["click","mouseover"])';
}
//create a wrapper to be able to use additional arguments
var handlerFn = function(e){
handler.apply(this, args && args instanceof Array ? args : []);
}
for (var i=0;i<events.length;i+=1){
element.addEventListener(events[i],handlerFn,useCapture);
}
}
function handler(e) {
// do things
};
// usage
addMultipleListeners(
document.getElementById('first'),
['touchstart','click'],
handler,
false);multiple event with javascript
/* get the button id "tg" which is used for toggling.Then on click few
elements with classname "adv" will disappear and at the same time few elements
with classname "btnpro" will increase in width to 80px*. Upon second click
elements with "adv" will appear again and the button width changes to 60px*/
document.getElementById("tg").onclick = function ()
{
my_fun1();
my_fun2();
}
function my_fun1()
{
var x = document.getElementsByClassName("adv")
for(var i=0; i<x.length;i++) {
if (x[i].style.display === "none") {
x[i].style.display = "block"
flag = false
} else {
x[i].style.display = "none"
flag = true
}
}
}
function my_fun2()
{
var x = document.getElementsByClassName("btnpro")
for(var i=0; i<x.length;i++) {
if(flag){
x[i].style.width = "80px";
}else{
x[i].style.width = "60px";
}
}
}addeventlistener javascript multiple functions
const invokeMe = () => console.log('I live here outside the scope');
const alsoInvokeMe = () => console.log('I also live outside the scope');
element.addEventListener('event',() => {
invokeMe();
alsoInvokeMe();
});Copyright © 2021 Codeinu
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