jQuery 练习[二]: 获取对象(3) 根据属性、内容匹配, 还有表单元素匹配

jQuery 练习[二]: 获取对象(3) 根据属性、内容匹配, 还有表单元素匹配

指定元素中包含 id 属性的, 如: $("span[id]")

<span id="span1" name="S1">AAA</span><br/>
<span id="span2" name="S2">BBB</span><br/>
<span name="Sx3">CCC</span><br/>
<span name="Sx4">DDD</span><br/>
<div id="div1" name="Dx1">EEE</div>
<div name="D2">FFF</div>

指定元素中不包含 id 属性的, 如: $("span:not(span[id])") 或 $("span:not([id])")

<span id="span1" name="S1">AAA</span><br/>
<span id="span2" name="S2">BBB</span><br/>
<span name="Sx3">CCC</span><br/>
<span name="Sx4">DDD</span><br/>
<div id="div1" name="Dx1">EEE</div>
<div name="D2">FFF</div>

包含 id 属性的, 如: $("body [id]")

<span id="span1" name="S1">AAA</span><br/>
<span id="span2" name="S2">BBB</span><br/>
<span name="Sx3">CCC</span><br/>
<span name="Sx4">DDD</span><br/>
<div id="div1" name="Dx1">EEE</div>
<div name="D2">FFF</div>

符合元素值的, 如: $("span[name='S2']")

<span id="span1" name="S1">AAA</span><br/>
<span id="span2" name="S2">BBB</span><br/>
<span name="Sx3">CCC</span><br/>
<span name="Sx4">DDD</span><br/>
<div id="div1" name="Dx1">EEE</div>
<div name="D2">FFF</div>

不符合元素值的, 如: $("span[name!='S2']")

<span id="span1" name="S1">AAA</span><br/>
<span id="span2" name="S2">BBB</span><br/>
<span name="Sx3">CCC</span><br/>
<span name="Sx4">DDD</span><br/>
<div id="div1" name="Dx1">EEE</div>
<div name="D2">FFF</div>

元素值开头是?, 如: $("span[name^='S']")

<span id="span1" name="S1">AAA</span><br/>
<span id="span2" name="S2">BBB</span><br/>
<span name="Sx3">CCC</span><br/>
<span name="Sx4">DDD</span><br/>
<div id="div1" name="Dx1">EEE</div>
<div name="D2">FFF</div>

元素值结尾是?, 如: $("html [name$='1']")

<span id="span1" name="S1">AAA</span><br/>
<span id="span2" name="S2">BBB</span><br/>
<span name="Sx3">CCC</span><br/>
<span name="Sx4">DDD</span><br/>
<div id="div1" name="Dx1">EEE</div>
<div name="D2">FFF</div>

元素值包含?, 如: $("body [name*='x']")

<span id="span1" name="S1">AAA</span><br/>
<span id="span2" name="S2">BBB</span><br/>
<span name="Sx3">CCC</span><br/>
<span name="Sx4">DDD</span><br/>
<div id="div1" name="Dx1">EEE</div>
<div name="D2">FFF</div>

多个属性条件, 如(有 id 且 name 开始是 "D"): $("body [id][name^='D']")

<span id="span1" name="S1">AAA</span><br/>
<span id="span2" name="S2">BBB</span><br/>
<span name="Sx3">CCC</span><br/>
<span name="Sx4">DDD</span><br/>
<div id="div1" name="Dx1">EEE</div>
<div name="D2">FFF</div>

查找包含 "AB" 的 span: $("span:contains('AB')")

<span>ABC</span><br/>
<span><b>ABC</b></span><br/>
<span></span>
<div>
    <span>ABC</span><br/>
    <span><b>ABC</b></span><br/>
    <span></span>
</div>

从 div 中查找包含 "AB" 的 span: $("div span:contains('AB')")

<span>ABC</span><br/>
<span><b>ABC</b></span><br/>
<span></span>
<div>
    <span>ABC</span><br/>
    <span><b>ABC</b></span><br/>
    <span></span>
</div>

查找包含的 span: $("span:has('b')")

<span>ABC</span><br/>
<span><b>ABC</b></span><br/>
<span></span>
<div>
    <span>ABC</span><br/>
    <span><b>ABC</b></span><br/>
    <span></span>
</div>

查找空的 span: $("span:empty")

<span>ABC</span><br/>
<span><b>ABC</b></span><br/>
<span></span>
<div>
    <span>ABC</span><br/>
    <span><b>ABC</b></span><br/>
    <span></span>
</div>

查找非空的(也就是作为父元素的) span: $("span:parent")

<span>ABC</span><br/>
<span><b>ABC</b></span><br/>
<span></span>
<div>
    <span>ABC</span><br/>
    <span><b>ABC</b></span><br/>
    <span></span>
</div>

:hidden 与 :visible 分别对应隐藏与显示的元素; 下例让已显示的变红, 让隐藏的显示为灰色.

<!doctype html>
<html>
<head>
    <script src="http://code.jquery.com/jquery-1.4.2.min.js"></script>
</head>
<body>
    <div>111</div>
    <div>222</div>
    <div style="display:none">333</div>
    <div style="display:none">444</div>
</body>
</html>
<script>
    $("div:visible").css("color", "red");
    $("div:hidden").css("display", "").css("color", "silver");
</script>

表单匹配:

:input 匹配:
    <input ... />
    <select></select>
    <textarea></textarea>
    <button></button>

:text        匹配 <input type="text" />
:password    匹配 <input type="password" />
:radio       匹配 <input type="radio" />
:checkbox    匹配 <input type="checkbox" />
:submit      匹配 <input type="submit" />
:reset       匹配 <input type="reset" />
:image       匹配 <input type="image" />
:file        匹配 <input type="" />
:button      匹配 <button></button>
:enabled     匹配所有可用的 input 元素
:disabled    匹配所有不可用的 input 元素
:checked     匹配所有选中的被选中复选框、单选框
:selected    匹配所有选中的 option 元素

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原文地址：https://www.cnblogs.com/del/p/1746514.html