作为一个后端，这么做到底是帮了前端还是害了前端？

V2EX = way to explore

V2EX 是一个关于分享和探索的地方

已注册用户请登录

${title}

`; switch(displayFormat) { case 'text-only': html += `

${description}

`; break; case 'small-with-description': html += `

${campaign.img_small_cid ? `

` : ''}

${description}

`; break; case 'banner-only': html += `

`; break; case 'big-only': html += `

`; break; case 'big-with-description': html += `

`; html += `

${description}

`; break; case 'big-with-title-description-button': html += `

`; html += `

${description}

`; html += `

${callToAction}

`; break; default: html += `

${description}

`; } html += `

Promoted by ${campaign.member.username}

PRO

` return html; } // Load campaign from emitter var xhr = new XMLHttpRequest(); xhr.open('GET', '/pro/emitter', true); xhr.setRequestHeader('Content-Type', 'application/json'); xhr.Onreadystatechange= function() { if (xhr.readyState === 4) { if (xhr.status === 200) { try { var campaign = JSON.parse(xhr.responseText); if (campaign && campaign.id) { var html = renderCampaign(campaign); document.getElementById('pro-campaign-container').innerHTML = html; } else { // No campaign to display, hide the container document.getElementById('pro-campaign-container').style.display = 'none'; } } catch (e) { // Parse error, hide the container document.getElementById('pro-campaign-container').style.display = 'none'; console.log('Error parsing campaign data: ' + e.message); } } else { // HTTP error, hide the container document.getElementById('pro-campaign-container').style.display = 'none'; console.log('Error loading campaign: HTTP ' + xhr.status); } } }; xhr.send(); });