[[["เข้าใจง่าย","easyToUnderstand","thumb-up"],["แก้ปัญหาของฉันได้","solvedMyProblem","thumb-up"],["อื่นๆ","otherUp","thumb-up"]],[["ไม่มีข้อมูลที่ฉันต้องการ","missingTheInformationINeed","thumb-down"],["ซับซ้อนเกินไป/มีหลายขั้นตอนมากเกินไป","tooComplicatedTooManySteps","thumb-down"],["ล้าสมัย","outOfDate","thumb-down"],["ปัญหาเกี่ยวกับการแปล","translationIssue","thumb-down"],["ตัวอย่าง/ปัญหาเกี่ยวกับโค้ด","samplesCodeIssue","thumb-down"],["อื่นๆ","otherDown","thumb-down"]],["อัปเดตล่าสุด 2025-05-29 UTC"],[[["Modern browsers restrict JavaScript from accessing data from different origins (websites) for security reasons, affecting VAST ad serving."],["This restriction prevents unauthorized data access between websites, but poses challenges for VAST ads as ad servers and players are often on different domains."],["Cross-Origin Resource Sharing (CORS) headers allow secure data sharing between origins by including specific HTTP headers in the ad server's response."],["VAST ad servers need to include `Access-Control-Allow-Origin` and `Access-Control-Allow-Credentials` headers to enable JavaScript-based ad serving."]]],["Web browsers restrict JavaScript network requests to the same origin, hindering JavaScript VAST rendering code from accessing VAST ad responses from different origins. To enable cross-origin access, VAST ad servers must include specific CORS headers in their responses. The `Access-Control-Allow-Origin` header should match the request's `Origin`, and `Access-Control-Allow-Credentials: true` allows for proper cookie handling. These headers enable ad players on any origin to read the VAST response, overcoming the same-origin security restriction.\n"]]
