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@ivangonzalezg
Forked from danburzo/README.md
Created May 21, 2019 06:27
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Get all event listeners on the page in Google Chrome
var items = Array.prototype.slice.call(
document.querySelectorAll('*')
).map(function(element) {
var listeners = getEventListeners(element);
return {
element: element,
listeners: Object.keys(listeners).map(function(k) {
return { event: k, listeners: listeners[k] };
})
};
}).filter(function(item) {
return item.listeners.length;
});
// See below for things you can do with the items
// Things you can do with the items
// 1. log them to the console
console.log(items);
// 2. Put a red border around the elements
items.forEach(function(item) {
item.element.style.outline = '1px solid red';
})
// 3. generate a summary
var summary = .map(function(item) {
var el = item.element,
id = el.id,
className = el.className;
if (className instanceof SVGAnimatedString) {
className = className.baseVal;
}
var str = el.tagName.toLowerCase() + (id ? '#' + id : '') + (className ? '.' + className.replace(/\s+/g, '.') : '');
str += ' ' + item.listeners.map(function(l) {
return l.event + ': ' + l.listeners.length;
}).join(' ');
return str;
}).join('\n');
console.log(summary);
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