@prerenderer/renderer-jsdom
Version:
A renderer for @prerenderer/prerenderer that uses JSDOM to prerender pages.
214 lines (213 loc) • 11.4 kB
JavaScript
;
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Object.defineProperty(exports, "__esModule", { value: true });
var Storage_1 = __importDefault(require("./Storage"));
var promise_limit_1 = __importDefault(require("promise-limit"));
var Options_1 = require("./Options");
var schema_utils_1 = require("schema-utils");
var ts_deepmerge_1 = __importDefault(require("ts-deepmerge"));
// Fetch polyfill for jsdom
var fs = __importStar(require("fs"));
var shim = function (window) {
/* eslint-disable @typescript-eslint/no-unsafe-assignment,@typescript-eslint/no-unsafe-call,@typescript-eslint/no-unsafe-member-access,@typescript-eslint/ban-ts-comment */
// @ts-ignore
!window.SVGElement && (window.SVGElement = window.HTMLElement);
// @ts-ignore
!window.localStorage && (window.localStorage = new Storage_1.default());
// @ts-ignore
!window.sessionStorage && (window.sessionStorage = new Storage_1.default());
/* eslint-enable */
var fetchPkg = require.resolve('whatwg-fetch/dist/fetch.umd.js');
window.eval(fs.readFileSync(fetchPkg, 'utf-8'));
};
var JSDOMRenderer = /** @class */ (function () {
function JSDOMRenderer(options) {
if (options === void 0) { options = {}; }
(0, schema_utils_1.validate)(Options_1.schema, options, {
name: 'Renderer JSDOM',
baseDataPath: 'options',
});
this.options = (0, ts_deepmerge_1.default)(Options_1.defaultOptions, options);
if (options.renderAfterTime && this.options.timeout < options.renderAfterTime) {
this.options.timeout = options.renderAfterTime + 1000;
}
}
JSDOMRenderer.prototype.initialize = function () {
return __awaiter(this, void 0, void 0, function () {
return __generator(this, function (_a) {
return [2 /*return*/];
});
});
};
JSDOMRenderer.prototype.renderRoutes = function (routes, prerenderer) {
var _this = this;
var rootOptions = prerenderer.getOptions();
var limiter = (0, promise_limit_1.default)(this.options.maxConcurrentRoutes);
var host = "http://".concat(rootOptions.server.host, ":").concat(rootOptions.server.port);
return Promise.all(routes.map(function (route) { return limiter(function () { return _this.getPageContent(host, route); }); }));
};
JSDOMRenderer.prototype.getPageContent = function (host, originalRoute) {
var options = this.options;
return new Promise(function (resolve, reject) {
var int = null;
var tim = null;
Promise.resolve().then(function () { return __importStar(require('jsdom')); }).then(function (_a) {
var JSDOM = _a.JSDOM;
var captureDocument = function () {
if (int !== null) {
clearInterval(int);
}
void pr.then(function (dom) {
if (tim !== null) {
clearTimeout(tim);
}
var result = {
originalRoute: originalRoute,
route: originalRoute,
html: dom.serialize(),
};
dom.window.close();
resolve(result);
});
};
var pr = JSDOM.fromURL("".concat(host).concat(originalRoute), __assign(__assign({ runScripts: 'dangerously', resources: 'usable', pretendToBeVisual: true }, options.JSDOMOptions), { beforeParse: function (window) {
var _a;
if ((_a = options.JSDOMOptions) === null || _a === void 0 ? void 0 : _a.beforeParse) {
options.JSDOMOptions.beforeParse(window);
}
// Injection / shimming must happen before we resolve with the window,
// otherwise the page will finish loading before the injection happens.
if (options.inject) {
window[options.injectProperty] = options.inject;
}
window.addEventListener('error', function (event) {
console.error(event.error);
});
var timeout = options.timeout;
var doc = window.document;
if (timeout && !options.renderAfterTime) {
var timeS_1 = Math.round(timeout / 100) / 10;
tim = setTimeout(function () {
int && clearInterval(int);
if (options.renderAfterDocumentEvent) {
reject(new Error("Could not prerender: event '".concat(options.renderAfterDocumentEvent, "' did not occur within ").concat(timeS_1, "s")));
}
else if (options.renderAfterElementExists) {
reject(new Error("Could not prerender: element '".concat(options.renderAfterElementExists, "' did not appear within ").concat(timeS_1, "s")));
}
else {
reject(new Error("Could not prerender: timed-out after ".concat(timeS_1, "s")));
}
}, timeout);
}
var fallback = true;
// Make all options `or`, the fastest to happen will trigger the rendering
if (options.renderAfterDocumentEvent) {
fallback = false;
// CAPTURE WHEN AN EVENT FIRES ON THE DOCUMENT
var event_1 = options.renderAfterDocumentEvent;
doc.addEventListener(event_1, captureDocument);
}
if (options.renderAfterElementExists) {
fallback = false;
// CAPTURE ONCE A SPECIFIC ELEMENT EXISTS
var selector_1 = options.renderAfterElementExists;
int = setInterval(function () {
if (doc.querySelector(selector_1)) {
captureDocument();
}
}, 50);
}
if (options.renderAfterTime) {
fallback = false;
// CAPTURE AFTER A NUMBER OF MILLISECONDS
setTimeout(captureDocument, options.renderAfterTime);
}
if (fallback) {
// DEFAULT: RUN IMMEDIATELY
doc.addEventListener('DOMContentLoaded', captureDocument);
}
shim(window);
} }));
pr.catch(reject);
}).catch(reject);
});
};
JSDOMRenderer.prototype.destroy = function () {
// NOOP
};
return JSDOMRenderer;
}());
exports.default = JSDOMRenderer;