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用getElementsByTagName获取节点，为什么出现未定义
Wsmtht
2016-03-27 10:16:56
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用getElementsByTagName获取节点，为什么出现未定义
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小成语
2018-11-15
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给dl 加一个id 比如id="dll"
var collDINodes=document.getElementsById("dll").getElementsByTagName("dd");
就可以获取dd数组了
slwsss
2016-03-27
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collDlNodes[0].nodeName
js
获取
节点
dom操作
接口 nodeType常量 nodeType值 备注 Element Node.ELEMENT_NODE 1 元素
节点
Text Node.TEXT_NODE 3 文本
节点
Document Node.DOCUME...
ref
获取
app
节点
但是这些方法在移动端
获取
不到显示
未定义
这个时候我们可以采取用ref的方式
获取
节点
。在我们拿到的
节点
里面有个 $el 里面有元素宽高，距离最近父元素的偏移量等等。如上先在view中定义ref，这边我命名为doms。大家应该都知道以下等
获取
dom
节点
的方式。
JavaScript 关于
节点
(记录学习)
在DOM中，每个容器，独立的元素或文本块都被看作为一个
节点
，
节点
是W3C DOM的基本构建块。当一个容器包含另一个容器时，对应
节点
之间有父子关系(父
节点
，子
节点
)。同时该
节点
数遵循HTML的结构化本质，如元素包含、
,前者又包含
，后者包含各种块元素等。DOM中定义了HTML文档中6中相关<em>节点</em>类型。所有支持W3C DOM的浏览器(IE5+,Mozl和Safari等)都实现了前三种常见的类型，其中Mozl实现了所有类型。<em>节点</em>类型表<em>节点</em>类型数值<em>节点</em>类型附加说明。</a></div><div data-report-view="{"mod":"popu_645","index":"4","dest":"https://blog.csdn.net/Dexter7/article/details/124382261","strategy":"2~default~OPENSEARCH~Rate","extra":"{\"utm_medium\":\"distribute.pc_relevant_bbs_down_v2.none-task-blog-2~default~OPENSEARCH~Rate-4-124382261-bbs-391924116.264^v3^pc_relevant_bbs_down_v2_opensearchbbsnew\",\"dist_request_id\":\"1714191026719_89161\"}","spm":"1035.2023.3001.6557"}" class="list-item" data-v-ca2d15ac><div class="recommend-title" data-v-ca2d15ac><img 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<em>未定义</em>的变量是在程序中声明但尚未给出任何值的变量。如果程序尝试读取<em>未定义</em>变量的值，则返回<em>未定义</em>的值。 3、什么是全局变量？这些变量如何声明，使用全局变量有哪些问题？ 全局变量是整</a></div></div></div></div> <div class="public_pc_right_footer2020" style="display:none;" data-v-4a5a7f56></div></div> <div id="right-floor-user-content_562" data-editor="{"type":"floor","pageId":143,"floorId":562}" class="user-right-floor right-box main-box detail-user-right" data-v-229a00b0><div class="__vuescroll" style="height:100%;width:100%;padding:0;position:relative;overflow:hidden;"><div class="__panel __hidebar" style="position:relative;box-sizing:border-box;height:100%;overflow-y:hidden;overflow-x:hidden;transform-origin:;transform:;"><div class="__view" style="position:relative;box-sizing:border-box;min-width:100%;min-height:100%;"><!----><div comp-data="[object Object]" baseInfo="[object Object]" community="[object Object]" class="introduce" data-v-4722a3ae><div class="introduce-title" data-v-4722a3ae><div class="img-info" data-v-4722a3ae><a 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