@thejohnfreeman/loadable
Version:
Like react-loadable, but better.
79 lines • 3.35 kB
JavaScript
var __extends = (this && this.__extends) || (function () {
var extendStatics = function (d, b) {
extendStatics = Object.setPrototypeOf ||
({ __proto__: [] } instanceof Array && function (d, b) { d.__proto__ = b; }) ||
function (d, b) { for (var p in b) if (b.hasOwnProperty(p)) d[p] = b[p]; };
return extendStatics(d, b);
};
return function (d, b) {
extendStatics(d, b);
function __() { this.constructor = d; }
d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());
};
})();
var __assign = (this && this.__assign) || function () {
__assign = Object.assign || function(t) {
for (var s, i = 1, n = arguments.length; i < n; i++) {
s = arguments[i];
for (var p in s) if (Object.prototype.hasOwnProperty.call(s, p))
t[p] = s[p];
}
return t;
};
return __assign.apply(this, arguments);
};
import * as React from 'react';
var Loading = function () { return React.createElement(React.Fragment, null, "Loading..."); };
function elementFromImported(props, imported) {
if (imported instanceof Function || imported instanceof React.Component) {
var Component = imported;
return React.createElement(Component, __assign({}, props));
}
if (imported && typeof imported === 'object' && 'default' in imported) {
return elementFromImported(props, imported.default);
}
return imported;
}
export var loadable = function (_a) {
var _b = _a === void 0 ? {} : _a, _c = _b.delay, delay = _c === void 0 ? 200 : _c, _d = _b.Placeholder, Placeholder = _d === void 0 ? Loading : _d;
return function (fetchElement) {
var Loadable = (function (_super) {
__extends(Loadable, _super);
function Loadable() {
var _this = _super !== null && _super.apply(this, arguments) || this;
_this.state = { element: null };
_this.timer = null;
return _this;
}
Loadable.prototype.componentDidMount = function () {
var _this = this;
fetchElement(this.props).then(function (imported) {
var element = elementFromImported(_this.props, imported);
_this.clearTimeout();
_this.setState({ element: element });
});
this.timer = setTimeout(function () {
if (_this.state.element) {
console.error('timer was not cleared when element loaded');
}
else {
_this.setState({ element: React.createElement(Placeholder, __assign({}, _this.props)) });
}
}, delay);
};
Loadable.prototype.componentWillUnmount = function () {
this.clearTimeout();
};
Loadable.prototype.render = function () {
return this.state.element;
};
Loadable.prototype.clearTimeout = function () {
clearTimeout(this.timer);
this.timer = null;
};
return Loadable;
}(React.Component));
return Loadable;
};
};
//# sourceMappingURL=index.js.map