The Element.before()
method inserts a set of Node
or DOMString
objects in the children list of this Element
's parent, just before this Element
. DOMString
objects are inserted as equivalent Text
nodes.
Element.before()
Syntax
before(... nodes)
Parameters
Exceptions
-
HierarchyRequestError
DOMException
-
Thrown when the node cannot be inserted at the specified point in the hierarchy.
Examples
Inserting an element
let container = document.createElement("div"); let p = document.createElement("p"); container.appendChild(p); let span = document.createElement("span"); p.before(span); console.log(container.outerHTML); // "<div><span></span><p></p></div>"
Inserting text
let container = document.createElement("div"); let p = document.createElement("p"); container.appendChild(p); p.before("Text"); console.log(container.outerHTML); // "<div>Text<p></p></div>"
Inserting an element and text
let container = document.createElement("div"); let p = document.createElement("p"); container.appendChild(p); let span = document.createElement("span"); p.before(span, "Text"); console.log(container.outerHTML); // "<div><span></span>Text<p></p></div>"
Specifications
Specification |
---|
DOM Standard # ref-for-dom-childnode-before① |
Browser compatibility
Desktop | Mobile | |||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
Chrome | Edge | Firefox | Internet Explorer | Opera | Safari | WebView Android | Chrome Android | Firefox for Android | Opera Android | Safari on IOS | Samsung Internet | |
before |
54
|
17
|
49
|
No
|
39
|
10
|
54
|
54
|
49
|
41
|
10
|
6.0
|
See also
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Licensed under the Creative Commons Attribution-ShareAlike License v2.5 or later.
https://developer.mozilla.org/en-US/docs/Web/API/Element/before