@benmalka/foxdriver/build/utils.js

Foxdriver is a Node library which provides a high-level API to control Firefox over the Remote Debugging Protocol

"use strict";

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.addEventListener = addEventListener;
exports.removeEventListeners = removeEventListeners;
exports.transformEvaluateArgs = transformEvaluateArgs;
exports.transformEvaluateScript = transformEvaluateScript;
exports.determinePrefValue = determinePrefValue;

function addEventListener(emitter, eventName, handler) {
  emitter.on(eventName, handler);
  return {
    emitter,
    eventName,
    handler
  };
}

function removeEventListeners(listeners) {
  for (const listener of listeners) {
    listener.emitter.removeListener(listener.eventName, listener.handler);
  }

  listeners.splice(0, listeners.length);
}

function transformEvaluateArgs(args) {
  args = Array.isArray(args) ? args : [args];
  return JSON.stringify(args.map(arg => {
    if (typeof arg === 'function') {
      return arg.toString();
    }

    return arg;
  }));
}

function transformEvaluateScript(script, argsTransformed) {
  if (typeof script === 'function') {
    return `(${script}).apply(window, ${argsTransformed})`;
  }

  return `(function () { ${script} }).apply(window, ${argsTransformed})`;
}

function determinePrefValue(value) {
  switch (typeof value) {
    case 'string':
      return `'${value}'`;

    case 'boolean':
    case 'number':
    default:
      return value;
  }
}
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