我们的志愿者还没有将这篇文章翻译为 中文 (简体)。加入我们帮助完成翻译！
This is an experimental technology
Because this technology's specification has not stabilized, check the compatibility table for usage in various browsers. Also note that the syntax and behavior of an experimental technology is subject to change in future versions of browsers as the specification changes.
The ParentNode.prepend method inserts a set of Node objects or DOMString objects before the first child of the ParentNode. DOMString objects are inserted as equivalent Text nodes.
Syntax
[Throws, Unscopable] void ParentNode.prepend((Node or DOMString)... nodes);
Parameters
Exceptions
HierarchyRequestError: Node cannot be inserted at the specified point in the hierarchy.
Examples
Prepending an element
var parent = document.createElement("div");
var p = document.createElement("p");
var span = document.createElement("span");
parent.append(p);
parent.prepend(span);
console.log(parent.childNodes); // NodeList [ <span>, <p> ]
Prepending text
var parent = document.createElement("div");
parent.append("Some text");
parent.prepend("Headline: ");
console.log(parent.textContent); // "Headline: Some text"
Appending an element and text
var parent = document.createElement("div");
var p = document.createElement("p");
parent.prepend("Some text", p);
console.log(parent.childNodes); // NodeList [ #text "Some text", <p> ]
ParentNode.prepend() is unscopable
The prepend() method is not scoped into the with statement. See Symbol.unscopables for more information.
var parent = document.createElement("div");
with(parent) {
prepend("foo");
}
// ReferenceError: prepend is not defined
Specification
| Specification | Status | Comment |
|---|---|---|
| DOM The definition of 'ParentNode.prepend()' in that specification. |
Living Standard | Initial definition. |
Browser compatibility
| Feature | Chrome | Firefox (Gecko) | Internet Explorer | Opera | Safari |
|---|---|---|---|---|---|
| Basic support | ? | 49 (49) | ? | ? | ? |
| Feature | Android | Firefox Mobile (Gecko) | IE Mobile | Opera Mobile | Safari Mobile |
|---|---|---|---|---|---|
| Basic support | ? | 49.0 (49) | ? | ? | ? |