Node.js Express 路由：动态颜色变化的网页标题

var express = require('express'); var app = express();

var colors = ['red', 'yellow', 'green', 'blue']; var currentColorIndex = 0;

app.get('/color.html', function(req, res) { var color = colors[currentColorIndex]; var html = '<h1 style='color:' + color + ';'>' + color + ''; res.send(html); currentColorIndex = (currentColorIndex + 1) % colors.length; });

app.listen(3000, function() { console.log('Server listening on port 3000'); });