puppeteer
Version:
A high-level API to control headless Chrome over the DevTools Protocol
60 lines (59 loc) • 2.48 kB
JavaScript
;
/**
* Copyright 2020 Google Inc. All rights reserved.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
Object.defineProperty(exports, "__esModule", { value: true });
exports.getQueryHandlerAndSelector = exports.clearQueryHandlers = exports.customQueryHandlers = exports.unregisterCustomQueryHandler = exports.registerCustomQueryHandler = void 0;
const _customQueryHandlers = new Map();
function registerCustomQueryHandler(name, handler) {
if (_customQueryHandlers.get(name))
throw new Error(`A custom query handler named "${name}" already exists`);
const isValidName = /^[a-zA-Z]+$/.test(name);
if (!isValidName)
throw new Error(`Custom query handler names may only contain [a-zA-Z]`);
_customQueryHandlers.set(name, handler);
}
exports.registerCustomQueryHandler = registerCustomQueryHandler;
/**
* @param {string} name
*/
function unregisterCustomQueryHandler(name) {
_customQueryHandlers.delete(name);
}
exports.unregisterCustomQueryHandler = unregisterCustomQueryHandler;
function customQueryHandlers() {
return _customQueryHandlers;
}
exports.customQueryHandlers = customQueryHandlers;
function clearQueryHandlers() {
_customQueryHandlers.clear();
}
exports.clearQueryHandlers = clearQueryHandlers;
function getQueryHandlerAndSelector(selector, defaultQueryHandler) {
const hasCustomQueryHandler = /^[a-zA-Z]+\//.test(selector);
if (!hasCustomQueryHandler)
return { updatedSelector: selector, queryHandler: defaultQueryHandler };
const index = selector.indexOf('/');
const name = selector.slice(0, index);
const updatedSelector = selector.slice(index + 1);
const queryHandler = customQueryHandlers().get(name);
if (!queryHandler)
throw new Error(`Query set to use "${name}", but no query handler of that name was found`);
return {
updatedSelector,
queryHandler,
};
}
exports.getQueryHandlerAndSelector = getQueryHandlerAndSelector;