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a902be5917
* refactor(utils): remove resize-observer-polyfill * test: add resize-observer-polyfill for tests only
45 lines
1.2 KiB
TypeScript
45 lines
1.2 KiB
TypeScript
import isServer from './isServer'
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import type { CustomizedHTMLElement } from './types'
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export type ResizableElement = CustomizedHTMLElement<{
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__resizeListeners__?: Array<(...args: unknown[]) => unknown>
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__ro__?: ResizeObserver
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}>
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const resizeHandler = function (entries: ResizeObserverEntry[]) {
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for (const entry of entries) {
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const listeners =
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(entry.target as ResizableElement).__resizeListeners__ || []
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if (listeners.length) {
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listeners.forEach((fn) => {
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fn()
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})
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}
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}
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}
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export const addResizeListener = function (
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element: ResizableElement,
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fn: (...args: unknown[]) => unknown
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): void {
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if (isServer || !element) return
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if (!element.__resizeListeners__) {
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element.__resizeListeners__ = []
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element.__ro__ = new ResizeObserver(resizeHandler)
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element.__ro__.observe(element)
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}
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element.__resizeListeners__.push(fn)
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}
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export const removeResizeListener = function (
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element: ResizableElement,
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fn: (...args: unknown[]) => unknown
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): void {
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if (!element || !element.__resizeListeners__) return
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element.__resizeListeners__.splice(element.__resizeListeners__.indexOf(fn), 1)
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if (!element.__resizeListeners__.length) {
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element.__ro__?.disconnect()
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}
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}
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