NCBI-written gatherer for ncbi_app meta

ncbi_app-gatherer.js

"use strict";

const Gatherer = require("lighthouse").Gatherer;

/**
 * @fileoverview Extracts `window.myLoadMetrics` from the test page.
 */

class NCBIAppMeta extends Gatherer {
  async afterPass(options) {
    const driver = options.driver;
    const expression = `(function() {
        var meta = document.querySelector("meta[name=ncbi_app]");
        ret = {name: false, content: false};
        var content;
        if (meta) {
            content = meta.getAttribute("content");
            ret.name = true;
            ret.content = content && content.length > 3;
        }
        return ret;
    })()`;
    return await driver.evaluateAsync(expression);
  }
}

module.exports = NCBIAppMeta;

OK I kind of figured. Thanks for taking a look!