orionsoft-react-scripts
Version:
Orionsoft Configuration and scripts for Create React App.
18 lines (13 loc) • 345 B
JavaScript
module.exports = addEventListener
function addEventListener(type, listener) {
var elem = this
if (!elem.listeners) {
elem.listeners = {}
}
if (!elem.listeners[type]) {
elem.listeners[type] = []
}
if (elem.listeners[type].indexOf(listener) === -1) {
elem.listeners[type].push(listener)
}
}