jquery - $('tr:even').addClass('alt'); -

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क्यों करता है $ ('tr: even')। AddClass ('alt'); चुनें 1 पंक्ति और $ ('tr: nth-child (यहां तक ​​कि)' से)। AddClass ('alt'); दूसरी पंक्ति से चयन करता है?

ऐसा इसलिए है: यहां तक ​​कि 0-आधारित अनुक्रमण का उपयोग करने वाले तत्व भी हो सकते हैं और: nth-child () 1-आधारित अनुक्रमण का उपयोग करता है।


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