source/check_browser.cjs

const fs=require('node:fs');
const path=require('node:path');
const {solve}=require('../web/solver.js');
const root=path.join(__dirname,'..');
const cat=JSON.parse(fs.readFileSync(path.join(root,'web/data/catalog.json')));
const choose=(kind,ratio)=>cat.components.find(c=>c.kind===kind&&c.diameter===.2&&Math.abs(c.thickness-.012)<1e-10&&Math.abs((kind==='straight'?c.length:c.radius)/.2-ratio)<1e-9);
const comps=[choose('straight',5),choose('elbow',2),choose('straight',5)].map(c=>JSON.parse(fs.readFileSync(path.join(root,'web/data',c.file))));
const request={components:comps,deltaT:100,gravity:[0,0,-9.81],supports:[{node:0,fixed:[0,1,2,3,4,5]}]};
const result=solve(request);
fs.mkdirSync(path.join(root,'reports'),{recursive:true});
fs.writeFileSync(path.join(root,'reports/browser_fixture.json'),JSON.stringify({request,result}));
console.log(JSON.stringify({frequency:result.frequency,tip:result.displacements.at(-1).at(-1),residual:result.residual,ms:result.elapsedMs}));