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CharacterData: insertData() method

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.

The insertData() method of the CharacterData interface inserts the provided data into this CharacterData node's current data, at the provided offset from the start of the existing data. The provided data is spliced into the existing data.

Syntax

insertData(offset, data)

Parameters

offset: The offset number of characters to insert the provided data at. 0 is the first character of the string.
data: The data to insert.

Return value

None.

Exceptions

IndexSizeError DOMException: Thrown if offset is negative or greater than the length of the contained data.

Example

<span>Result: </span>A string.

const span = document.querySelector("span");
const textNode = span.nextSibling;

textNode.insertData(2, "long ");

Specifications

Specification
DOM> # dom-characterdata-insertdata>

Browser compatibility

	Desktop					Mobile
	Chrome	Edge	Firefox	Opera	Safari	Chrome Android	Firefox for Android	Opera Android	Safari on IOS	Samsung Internet	WebView Android	WebView on iOS
`insertData`	1	12	1	≤12.1	1	18	4	≤12.1	1	1.0	4.4	1