![](/img/trans.png)
[英]how to remove and create new ul li tag in html using javascript
[英]How to create element li img tag in ul tag using javascript?
如何使用javascript在ul標簽中創建li li img標簽元素?
我要建立
<li id="123">
<img src="https://upload.wikimedia.org/wikipedia/commons/5/53/Loading_bar.gif"/>
</li>
內
<ul id="placehere">
但是不行,我該怎么辦?
https://jsfiddle.net/btz69dyk/2/
<body>
<script type="text/javascript">
window.onload=function(){
var elem = document.createElement("li");
elem.setAttribute("id", "123");
var elem = document.createElement("img");
elem.setAttribute("src", "https://upload.wikimedia.org/wikipedia/commons/5/53/Loading_bar.gif");
elem.setAttribute("height", "");
elem.setAttribute("width", "");
elem.setAttribute("alt", "Flower");
document.getElementById("placehere").appendChild(elem);
}
</script>
<ul id="placehere">
</ul>
</body>
問題是這四行
var elem = document.createElement("li");
elem.setAttribute("id", "123");
var elem = document.createElement("img");
elem.setAttribute("src", "https://upload.wikimedia.org/wikipedia/commons/5/53/Loading_bar.gif");
在這里,您將使用相同的變量名再次創建相同的elem
元素,從而使li
丟失
更改為
var elem1 = document.createElement("li");
elem1.setAttribute("id", "123");
var elem = document.createElement("img");
elem.setAttribute("src", "https://upload.wikimedia.org/wikipedia/commons/5/53/Loading_bar.gif");
elem.setAttribute("height", "");
elem.setAttribute("width", "");
elem.setAttribute("alt", "Flower");
document.getElementById("placehere").appendChild(elem1);
elem1.appendChild(elem);
首先將
image
元素附加到li
元素,然后在ul
元素中附加li
元素。
在您的示例中,您正在同一變量( elem
)中創建元素,因此第二個元素將覆蓋先前創建的元素(變量將包含后面的元素)。 在DOM
更新image
元素之前將其添加到li
元素中,只會對DOM
結構造成一次麻煩。
嘗試這個:
window.onload = function() { var li_elem = document.createElement("li"); li_elem.setAttribute("id", "123"); var img_elem = document.createElement("img"); img_elem.setAttribute("src", "https://upload.wikimedia.org/wikipedia/commons/5/53/Loading_bar.gif"); img_elem.setAttribute("height", ""); img_elem.setAttribute("width", ""); img_elem.setAttribute("alt", "Flower"); li_elem.appendChild(img_elem); document.getElementById("placehere").appendChild(li_elem); }
<ul id="placehere"> </ul>
var listEle = document.createElement("li"); listEle.setAttribute("id", "123"); var elem = document.createElement("img"); elem.setAttribute("src", "https://upload.wikimedia.org/wikipedia/commons/5/53/Loading_bar.gif"); elem.setAttribute("height", ""); elem.setAttribute("width", ""); elem.setAttribute("alt", "Flower"); document.getElementById("placehere").appendChild(listEle).appendChild(elem);
聲明:本站的技術帖子網頁,遵循CC BY-SA 4.0協議,如果您需要轉載,請注明本站網址或者原文地址。任何問題請咨詢:yoyou2525@163.com.