@mayank1513/sticky-section-header
Version:
[](https://badge.fury.io/js/@mayank1513%2Fsticky-section-header)
107 lines (106 loc) • 4.93 kB
JavaScript
;
"use client";
var __createBinding = (this && this.__createBinding) || (Object.create ? (function(o, m, k, k2) {
if (k2 === undefined) k2 = k;
var desc = Object.getOwnPropertyDescriptor(m, k);
if (!desc || ("get" in desc ? !m.__esModule : desc.writable || desc.configurable)) {
desc = { enumerable: true, get: function() { return m[k]; } };
}
Object.defineProperty(o, k2, desc);
}) : (function(o, m, k, k2) {
if (k2 === undefined) k2 = k;
o[k2] = m[k];
}));
var __setModuleDefault = (this && this.__setModuleDefault) || (Object.create ? (function(o, v) {
Object.defineProperty(o, "default", { enumerable: true, value: v });
}) : function(o, v) {
o["default"] = v;
});
var __importStar = (this && this.__importStar) || function (mod) {
if (mod && mod.__esModule) return mod;
var result = {};
if (mod != null) for (var k in mod) if (k !== "default" && Object.prototype.hasOwnProperty.call(mod, k)) __createBinding(result, mod, k);
__setModuleDefault(result, mod);
return result;
};
var __rest = (this && this.__rest) || function (s, e) {
var t = {};
for (var p in s) if (Object.prototype.hasOwnProperty.call(s, p) && e.indexOf(p) < 0)
t[p] = s[p];
if (s != null && typeof Object.getOwnPropertySymbols === "function")
for (var i = 0, p = Object.getOwnPropertySymbols(s); i < p.length; i++) {
if (e.indexOf(p[i]) < 0 && Object.prototype.propertyIsEnumerable.call(s, p[i]))
t[p[i]] = s[p[i]];
}
return t;
};
Object.defineProperty(exports, "__esModule", { value: true });
exports.CollapsibleStickySectionHeader = void 0;
const react_1 = __importStar(require("react"));
function CollapsibleStickySectionHeader(_a) {
var { children, maxHeight, minHeight, onChangeHeight, top = 0, viewPort, nCheckPoints = 100, tag = "header" } = _a, props = __rest(_a, ["children", "maxHeight", "minHeight", "onChangeHeight", "top", "viewPort", "nCheckPoints", "tag"]);
const Tag = tag || "header";
const probeRef = (0, react_1.useRef)(null);
const ref = (0, react_1.useRef)(null);
if (minHeight > maxHeight)
throw Error("minHeight can not be greated than maxHeight.");
const probeHeight = maxHeight - minHeight;
(0, react_1.useEffect)(() => {
const target = probeRef === null || probeRef === void 0 ? void 0 : probeRef.current;
if (!target)
return;
const options = {
root: viewPort || null,
rootMargin: `${-(top + 1)}px 0px 0px 0px`,
threshold: [...Array(nCheckPoints).keys(), nCheckPoints].map((i) => i / nCheckPoints),
};
const observerHandler = (entries) => {
const header = ref === null || ref === void 0 ? void 0 : ref.current;
if (!header || !entries[0])
return;
const { intersectionRatio, boundingClientRect, rootBounds } = entries[0];
const headerHeight = minHeight + intersectionRatio * probeHeight;
// @ts-ignore
header.style.height = `${headerHeight}px`;
onChangeHeight === null || onChangeHeight === void 0 ? void 0 : onChangeHeight(intersectionRatio, headerHeight);
const isSticky = boundingClientRect.top - rootBounds.top < top + 1;
// @ts-ignore
header.style.position = isSticky ? "sticky" : "unset";
// @ts-ignore
header.toggleAttribute("stuck", isSticky);
};
// @ts-ignore
const observer = new IntersectionObserver(observerHandler, options);
target && observer.observe(target);
return () => {
target && observer.unobserve(target);
};
}, [probeRef === null || probeRef === void 0 ? void 0 : probeRef.current, viewPort]);
const styles = (0, react_1.useMemo)(() => ({
container: {
position: "relative",
height: `${maxHeight}px`,
marginBottom: `${-maxHeight}px`,
pointerEvents: "none",
},
probe: {
position: "absolute",
height: `${probeHeight}px`,
top: `0px`,
width: "100%",
pointerEvents: "none",
},
header: {
top: `${top}px`,
height: `${maxHeight}px`,
width: "100%",
overflow: "hidden",
boxSizing: "border-box",
},
}), [maxHeight, minHeight, top]);
return (react_1.default.createElement(react_1.default.Fragment, null,
react_1.default.createElement("div", { className: "container", style: styles.container },
react_1.default.createElement("div", { className: "probe", ref: probeRef, style: styles.probe })),
react_1.default.createElement(Tag, Object.assign({ ref: ref, style: styles.header }, props), children)));
}
exports.CollapsibleStickySectionHeader = CollapsibleStickySectionHeader;