Documentï¼documentElement å±¬æ§

Baseline Widely available

This feature is well established and works across many devices and browser versions. Itâs been available across browsers since â¨2015å¹´7æâ©.

Document ä»é¢ç documentElement å¯è®å±¬æ§æåå³ä½çºæä»¶æ ¹åç´ çåç´ ï¼ä¾å¦ï¼HTML æä»¶ä¸ç <html> åç´ ï¼ã

å¼

ä¸å Element ç©ä»¶ã

ç¯ä¾

const rootElement = document.documentElement;
const firstTier = rootElement.childNodes;
// firstTier æ¯æ ¹åç´ çç´æ¥åç¯é»ç NodeList
// åæ¯ <head> å <body>

for (const child of firstTier) {
  // å°æ ¹åç´ çæ¯åç´æ¥åç¯é»å·è¡æäºæä½
}