javascript - local copy of document.getElementsByTagName -

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निम्नलिखित कोड क्यों काम नहीं करता? 

  var f = document.getElementsByTagName; Var x = f ('div');

मुझे क्रोम में "प्रकार त्रुटि: अवैध आवाज़" मिलता है, सफारी में "प्रकार त्रुटि: प्रकार त्रुटि" मुझे फ़ायरफ़ॉक्स में कोई त्रुटि नहीं मिली है, लेकिन यह काम नहीं करता है। मैंने आईई या ओपेरा में अभी तक परीक्षण नहीं किया है। जावास्क्रिप्ट में "बाध्य विधि" जैसी कोई चीज नहीं है (पायथन से शब्द उधार लेने के लिए),

फ़ंक्शन , विधि के संदर्भ में नहीं मिलते हैं जब आप इसे कहते हैं, "यह" विंडो पर सेट है, दस्तावेज़ नहीं, इसलिए यह काम नहीं करता है।

तकनीकी रूप से ऐसा करने से आप जो चाहें प्राप्त कर सकते हैं, लेकिन जैसा कि आप संभवतः देख सकते हैं कि यह व्यर्थ है: 

  var x = f.call (दस्तावेज़, 'div') < / Code>

(यह व्यर्थ है क्योंकि यह कम पठनीय है और बिना कॉलिंग दस्तावेज़ के रूप में तेज़ है। टैग एलेमेंट्स बायटैग_नाम ()। समापन का उपयोग इसी तरह से व्यर्थ है।)


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