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import ResizeObserver from 'resize-observer-polyfill';
export const on = (function() {
Eif (document.addEventListener) {
return function(element, event, handler) {
if (element && event && handler) {
element.addEventListener(event, handler, false);
}
};
}
return function(element, event, handler) {
if (element && event && handler) {
element.attachEvent(`on${event}`, handler);
}
};
})();
/* istanbul ignore next */
export const off = (function() {
if (document.removeEventListener) {
return function(element, event, handler) {
if (element && event) {
element.removeEventListener(event, handler, false);
}
};
}
return function(element, event, handler) {
if (element && event) {
element.detachEvent(`on${event}`, handler);
}
};
})();
const resizeHandler = entries => {
Object.values(entries).forEach(entry => {
const listeners = entry.target.__resizeListeners__ ?? [];
if (listeners.length) {
listeners.forEach(fn => {
fn();
});
}
});
};
export const addResizeListener = (element, fn) => {
Iif (!element) return;
Eif (!element.__resizeListeners__) {
// eslint-disable-next-line no-param-reassign
element.__resizeListeners__ = [];
// eslint-disable-next-line no-param-reassign
element.__ro__ = new ResizeObserver(resizeHandler);
element.__ro__.observe(element);
}
element.__resizeListeners__.push(fn);
};
export const removeResizeListener = (element, fn) => {
if (!element || !element.__resizeListeners__) return;
element.__resizeListeners__.splice(
element.__resizeListeners__.indexOf(fn),
1
);
if (!element.__resizeListeners__.length) {
element.__ro__.disconnect();
}
};
export const randId = prefix =>
Math.random()
.toString(36)
.replace('0.', prefix ?? '');
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