lazy-preload
Version:
Wraps the React.lazy API with preloaded functionality
70 lines (69 loc) • 3.17 kB
JavaScript
;
/**
* 默认显示图标，Hover 时懒加载组件
* @author: enoyao
* @date: 2022-06-18 23:35:22
*/
var __createBinding = (this && this.__createBinding) || (Object.create ? (function(o, m, k, k2) {
if (k2 === undefined) k2 = k;
Object.defineProperty(o, k2, { enumerable: true, get: function() { return m[k]; } });
}) : (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.hasOwnProperty.call(mod, k)) __createBinding(result, mod, k);
__setModuleDefault(result, mod);
return result;
};
Object.defineProperty(exports, "__esModule", { value: true });
exports.LazyLoadComponent = exports.lazyWithPreload = void 0;
var react_1 = __importStar(require("react"));
function lazyWithPreload(factory) {
var LazyComponent = react_1.lazy(factory);
var factoryPromise;
var LoadedComponent;
var Component = react_1.forwardRef(function LazyWithPreload(props, ref) {
return react_1.createElement(LoadedComponent !== null && LoadedComponent !== void 0 ? LoadedComponent : LazyComponent, Object.assign(ref ? { ref: ref } : {}, props));
});
Component.isLoaded = false;
Component.preload = function () {
if (!factoryPromise) {
factoryPromise = factory().then(function (module) {
Component.isLoaded = true;
LoadedComponent = module.default;
});
}
return factoryPromise;
};
return Component;
}
exports.lazyWithPreload = lazyWithPreload;
function LazyLoadComponent(props) {
var _a;
var _b = react_1.useState(false), showLazyLoadComponent = _b[0], setShowLazyLoadComponent = _b[1];
var _c = react_1.useState(false), hasClick = _c[0], setHasClick = _c[1];
var lazyLoadElement = react_1.useRef(null);
react_1.useEffect(function () {
var _a;
if (hasClick) {
(_a = lazyLoadElement === null || lazyLoadElement === void 0 ? void 0 : lazyLoadElement.current) === null || _a === void 0 ? void 0 : _a.click();
setHasClick(false);
}
}, [(_a = props.lazyLoadComponent) === null || _a === void 0 ? void 0 : _a.isLoaded]);
return (react_1.default.createElement(react_1.Suspense, { fallback: props.loading }, showLazyLoadComponent ?
react_1.default.createElement("div", { ref: lazyLoadElement }, props.children) : react_1.default.createElement("div", { onClick: function () { return setHasClick(true); }, onMouseOver: function () {
var _a;
// 这里先不 await
(_a = props.lazyLoadComponent) === null || _a === void 0 ? void 0 : _a.preload();
setShowLazyLoadComponent(true);
} }, props.defaultLoadComponent)));
}
exports.LazyLoadComponent = LazyLoadComponent;