Element:prepend() 方法
Baseline Widely available
This feature is well established and works across many devices and browser versions. It’s been available across browsers since July 2015.
语法
js
prepend(param1)
prepend(param1, param2)
prepend(param1, param2, /* …, */ paramN)
参数
param1
、……、paramN
-
一组要插入的
Node
对象或字符串。
返回值
无(undefined
)。
异常
HierarchyRequestError
DOMException
-
当节点无法插入到指定的层级位置时抛出。
示例
在元素前插入
js
let div = document.createElement("div");
let p = document.createElement("p");
let span = document.createElement("span");
div.append(p);
div.prepend(span);
console.log(div.childNodes); // NodeList [ <span>, <p> ]
在文本前插入
js
let div = document.createElement("div");
div.append("一些文本");
div.prepend("标题:");
console.log(div.textContent); // “标题:一些文本”
在元素前插入元素和文本
js
let div = document.createElement("div");
let p = document.createElement("p");
div.prepend("一些文本", p);
console.log(div.childNodes); // NodeList [ #text "一些文本", <p> ]
prepend 方法是不可绑定作用域的
prepend()
方法无法绑定到 with
语句中的作用域。有关更多信息,请参阅 Symbol.unscopables
。
js
let div = document.createElement("div");
with (div) {
prepend("foo");
}
// ReferenceError: prepend is not defined
规范
Specification |
---|
DOM # ref-for-dom-parentnode-prepend① |
浏览器兼容性
Report problems with this compatibility data on GitHubdesktop | mobile | |||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
prepend |
Legend
Tip: you can click/tap on a cell for more information.
- Full support
- Full support
The compatibility table on this page is generated from structured data. If you'd like to contribute to the data, please check out https://github.com/mdn/browser-compat-data and send us a pull request.