灯塔默认给出移动端的性能评分，如何获得桌面端的性能评分？以编程方式使用节点模块

Question

需要在下面的代码中添加什么参数才能获得Desktop的性能分数？

const fs = require('fs');
    const lighthouse = require('lighthouse');
    const chromeLauncher = require('chrome-launcher');
    const log = require('lighthouse-logger');
    
    
    (async () => {
        log.setLevel('info');
        const chrome = await chromeLauncher.launch({ chromeFlags: ['--headless'] });
        const options = { output: 'json', onlyCategories: ['performance'], port: chrome.port };
        const runnerResult = await lighthouse('url', options);
    
        // `.report` is the HTML report as a string
        const reportJson = runnerResult.report;
        fs.writeFileSync('lhreport.json', reportJson);
    
        // `.lhr` is the Lighthouse Result as a JS object
        console.log('Report is done for', runnerResult.lhr.finalUrl);
        console.log('Performance score was', runnerResult.lhr.categories.performance.score * 100);
    
        await chrome.kill();
    })();

Answer 1

在options对象中添加以下属性：

emulatedFormFactor: "desktop"

const options = { output: 'json', emulatedFormFactor:"desktop", vonlyCategories: ['performance'], port: chrome.port };