객체 모델 생성 | Web Fundamentals | Google Developers
"type": "thumb-down", "id": "missingTheInformationINeed", "label":"Missing the information I need" },{ "type": "thumb-down", "id": "tooComplicatedTooManySteps", "label":"Too complicated / too many steps" },{ "type": "thumb-down", "id": "outOfDate", "label":"Out of date" },{ "type": "thumb-down", "id": "translationIssue", "label":"Translation issue" },{ "type": "thumb-down", "id": "samplesCodeIssue", "label":"Samples / code issue" },{ "type": "thumb-down", "id": "otherDown", "label":"Other" }] [{ "type": "thumb-up", "id": "easyToUnderstand", "label":"Easy to understand" },{ "type": "thumb-up", "id": "solvedMyProblem", "label":"Solved my problem" },{ "type": "thumb-up", "id": "otherUp", "label":"Other" }] 브라우저가 페이지를 렌더링하려면 먼저 DOM 및 CSSOM 트리를 생성해야 합니다.
https://developers.google.com/web/fundamentals/performance/critical-rendering-path/constructing-the-object-model?hl=ko