63 lines
1.6 KiB
HTML
63 lines
1.6 KiB
HTML
<!DOCTYPE html>
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<html lang="en">
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<head>
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<meta charset="UTF-8">
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<title>14-DOM</title>
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</head>
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<body>
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<img id="light" src="../resource/off.gif"><br>
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<div class="cls">传智教育</div> <br>
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<div class="cls">黑马程序员</div> <br>
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<input type="checkbox" name="hubby"> 电影
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<input type="checkbox" name="hubby"> 旅游
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<input type="checkbox" name="hubby"> 游戏
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<br>
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<script>
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//通过document对象获取element对象
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/*
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* getElementById()：根据id属性值获取，返回单个Element对象
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* `getElementsByTagName()`：根据标签名称获取，返回Element对象数组
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* `getElementsByName()`：根据name属性值获取，返回Element对象数组
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* `getElementsByClassName()`：根据class属性值获取，返回Element对象数组
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*
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*
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* */
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//1.getElementById("light")
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// var img = document.getElementById("light");
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// alert(img)
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//2.getElementsByTagName():根据标签名称获取，返回Element对象数组
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var divs = document.getElementsByTagName("div");
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//alert(divs.length)
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// for (let i = 0; i < divs.length; i++) {
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// alert(divs[i])
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// }
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//3.getElementsByName()`：根据name属性值获取，返回Element对象数组
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var hubbys = document.getElementsByName("hubby");
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// alert(hubbys.length)
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// for (let i = 0; i < hubbys.length; i++) {
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// alert(hubbys[i])
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// }
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//4.getElementsByClassName()`：根据class属性值获取，返回Element对象数组
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var clss = document.getElementsByClassName("cls");
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for (let i = 0; i < clss.length; i++) {
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alert(clss[i])
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}
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</script>
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</body>
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</html> |