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\u5728DOM Level2\u6807\u51c6\u4e2d\u5b9a\u4e49\u4e86\u4e00\u4e2aHTMLElement\u5bf9\u8c61\uff0c\u5b83\u89c4\u5b9a\u6240\u6709\u7684DOM\u5bf9\u8c61\u90fd\u662fHTMLElement\u7684\u5b9e\u4f8b\uff0c\u6240\u4ee5\u6211\u4eec\u53ef\u4ee5\u5229\u7528\u8fd9\u70b9\u6765\u5224\u65ad\u4e00\u4e2a\u5bf9\u8c61\u662f\u4e0d\u662fDOM\u5bf9\u8c61:\u5982\u679c\u8be5\u5bf9\u8c61\u662fHTMLElement\u7684\u5b9e\u4f8b\uff0c\u5219\u5b83\u80af\u5b9a\u662f\u4e00\u4e2aDOM\u5bf9\u8c61\u3002\u5728\u4e0d\u652f\u6301HTMLElement\u7684\u6d4f\u89c8\u5668\u4e2d\u6211\u4eec\u5219\u8fd8\u662f\u4f7f\u7528\u7279\u5f81\u68c0\u6d4b\u6cd5\u3002<\/p>
<script type="text\/java<\/a> script"><\/p> \/\/\u9996\u5148\u8981\u5bf9HTMLElement\u8fdb\u884c\u7c7b\u578b\u68c0\u67e5\uff0c\u56e0\u4e3a\u5373\u4f7f\u5728\u652f\u6301HTMLElement<\/p> \/\/\u7684\u6d4f\u89c8\u5668\u4e2d\uff0c\u7c7b\u578b\u5374\u662f\u6709\u5dee\u522b\u7684\uff0c\u5728Chrome,Opera\u4e2dHTMLElement\u7684<\/p> \/\/\u7c7b\u578b\u4e3afunction\uff0c\u6b64\u65f6\u5c31\u4e0d\u80fd\u7528\u5b83\u6765\u5224\u65ad\u4e86<\/p> var isDOM = ( typeof HTMLElement === 'object' ) ?<\/p> function(obj){<\/p> return obj instanceof HTMLElement;<\/p> } :<\/p> function(obj){<\/p> return obj && typeof obj === 'object' && obj.nodeType === 1 && typeof obj.nodeName === 'string';<\/p> }<\/p> <\/script> \u5982\u4f55\u5224\u65ad\u4e00\u4e2ajs\u5bf9\u8c61\u662f\u5426\u4e00\u4e2ajQuery\u5bf9\u8c61<\/p> \u5224\u65ad\u4e00\u4e2a\u5bf9\u8c61\u662f\u5426\u4e3ajQuery\u5bf9\u8c61\u53ef\u4ee5\u7528 obj instanceof jQuery<\/p> jQuery\u5bf9\u8c61\u4e0eDOM\u5bf9\u8c61\u4e4b\u95f4\u7684\u8f6c\u6362\u65b9\u6cd5<\/p> \u5728\u518d\u4e24\u8005\u8f6c\u6362\u524d\u9996\u5148\u6211\u4eec\u7ed9\u4e00\u4e2a\u7ea6\u5b9a\uff1a\u5982\u679c\u4e00\u4e2a\u83b7\u53d6\u7684\u662fjQuery\u5bf9\u8c61\uff0c\u90a3\u4e48\u6211\u4eec\u5728\u53d8\u91cf\u524d\u9762\u52a0\u4e0a$\uff0c\u5982\uff1avar $variab = jQuery\u5bf9\u8c61\uff1b\u5982\u679c\u83b7\u53d6\u7684\u662fDOM\u5bf9\u8c61\uff0c\u5219\u4e0e\u4e60\u60ef\u666e\u901a\u4e00\u6837\uff1avar variab = DOM\u5bf9\u8c61\uff1b\u8fd9\u4e48\u7ea6\u5b9a\u53ea\u662f\u4fbf\u4e8e\u8bb2\u89e3\u4e0e\u533a\u522b\uff0c\u5b9e\u9645\u4f7f\u7528\u4e2d\u5e76\u4e0d\u89c4\u5b9a\u3002<\/p> jQuery\u5bf9\u8c61\u8f6c\u6210DOM\u5bf9\u8c61\uff1a<\/p> \u4e24\u79cd\u8f6c\u6362\u65b9\u5f0f\u5c06\u4e00\u4e2ajQuery\u5bf9\u8c61\u8f6c\u6362\u6210DOM\u5bf9\u8c61\uff1a[index]\u548c.get(index);<\/p> (1)jQuery\u5bf9\u8c61\u662f\u4e00\u4e2a\u6570\u636e\u5bf9\u8c61\uff0c\u53ef\u4ee5\u901a\u8fc7[index]\u7684\u65b9\u6cd5\uff0c\u6765\u5f97\u5230\u76f8\u5e94\u7684DOM\u5bf9\u8c61\u3002<\/p> \u5982\uff1avar $v =$("#v") ; \/\/jQuery\u5bf9\u8c61<\/p> var v=$v[0]; \/\/DOM\u5bf9\u8c61<\/p> alert(v.checked) \/\/\u68c0\u6d4b\u8fd9\u4e2acheckbox\u662f\u5426\u88ab\u9009\u4e2d<\/p> (2)jQuery\u672c\u8eab\u63d0\u4f9b\uff0c\u901a\u8fc7.get(index)\u65b9\u6cd5\uff0c\u5f97\u5230\u76f8\u5e94\u7684DOM\u5bf9\u8c61<\/p> \u5982\uff1avar $v=$("#v"); \/\/jQuery\u5bf9\u8c61<\/p> var v=$v.get(0); \/\/DOM\u5bf9\u8c61<\/p> alert(v.checked) \/\/\u68c0\u6d4b\u8fd9\u4e2acheckbox\u662f\u5426\u88ab\u9009\u4e2d<\/p> DOM\u5bf9\u8c61\u8f6c\u6210jQuery\u5bf9\u8c61:<\/p> \u5bf9\u4e8e\u5df2\u7ecf\u662f\u4e00\u4e2aDOM\u5bf9\u8c61\uff0c\u53ea\u9700\u8981\u7528$()\u628aDOM\u5bf9\u8c61\u5305\u88c5\u8d77\u6765\uff0c\u5c31\u53ef\u4ee5\u83b7\u5f97\u4e00\u4e2ajQuery\u5bf9\u8c61\u4e86\u3002$(DOM\u5bf9\u8c61)<\/p> \u5982\uff1avar v=document.getElementById("v"); \/\/DOM\u5bf9\u8c61<\/p> var $v=$(v); \/\/jQuery\u5bf9\u8c61<\/p> \u8f6c\u6362\u540e\uff0c\u5c31\u53ef\u4ee5\u4efb\u610f\u4f7f\u7528jQuery\u7684\u65b9\u6cd5\u4e86\u3002<\/p> \u901a\u8fc7\u4ee5\u4e0a\u65b9\u6cd5\uff0c\u53ef\u4ee5\u4efb\u610f\u7684\u76f8\u4e92\u8f6c\u6362jQuery\u5bf9\u8c61\u548cDOM\u5bf9\u8c61\u3002\u9700\u8981\u518d\u5f3a\u8c03\u6ce8\u610f\u7684\u662f\uff1aDOM\u5bf9\u8c61\u624d\u80fd\u4f7f\u7528DOM\u4e2d\u7684\u65b9\u6cd5\uff0cjQuery\u5bf9\u8c61\u662f\u4e0d\u53ef\u4ee5\u7528DOM\u4e2d\u7684\u65b9\u6cd5\u3002<\/p> \u4e0b\u9762\u662f\u5176\u5b83\u7684\u76f8\u5173\u4f7f\u7528\u65b9\u6cd5\uff1a<\/p> 1\u3001DOM\u5bf9\u8c61\u8f6cjQuery\u5bf9\u8c61<\/p> \u666e\u901a\u7684Dom\u5bf9\u8c61\u4e00\u822c\u53ef\u4ee5\u901a\u8fc7$()\u8f6c\u6362\u6210jQuery\u5bf9\u8c61\u3002<\/p> \u5982\uff1a$(document.getElementById("msg"))<\/p> \u8fd4\u56de\u7684\u5c31\u662fjQuery\u5bf9\u8c61\uff0c\u53ef\u4ee5\u4f7f\u7528jQuery\u7684\u65b9\u6cd5\u3002<\/p> 2\u3001jQuery\u5bf9\u8c61\u8f6cDOM\u5bf9\u8c61<\/p> \u7531\u4e8ejQuery\u5bf9\u8c61\u672c\u8eab\u662f\u4e00\u4e2a\u96c6\u5408\u3002\u6240\u4ee5\u5982\u679cjQuery\u5bf9\u8c61\u8981\u8f6c\u6362\u4e3aDom\u5bf9\u8c61\u5219\u5fc5\u987b\u53d6\u51fa\u5176\u4e2d\u7684\u67d0\u4e00\u9879\uff0c\u4e00\u822c\u53ef\u901a\u8fc7\u7d22\u5f15\u53d6\u51fa\u3002<\/p> \u5982\uff1a $("#msg")[0]\uff0c$("div").eq(1)[0]\uff0c$("div").get()[1]\uff0c$("td")[5]<\/p> \u8fd9\u4e9b\u90fd\u662fDom\u5bf9\u8c61\uff0c\u53ef\u4ee5\u4f7f\u7528Dom\u4e2d\u7684\u65b9\u6cd5\uff0c\u4f46\u4e0d\u80fd\u518d\u4f7f\u7528jQuery\u7684\u65b9\u6cd5\u3002<\/p> \u4ee5\u4e0b\u51e0\u79cd\u5199\u6cd5\u90fd\u662f\u6b63\u786e\u7684\uff1a<\/p> $("#msg").html();<\/p> $("#msg")[0].innerHTML;<\/p> $("#msg").eq(0)[0].innerHTML;<\/p> $("#msg").get(0).innerHTML;<\/p>
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