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Showing content from https://webplatform.github.io/docs/dom/CharacterData/deleteData below:

deleteData ยท WebPlatform Docs

deleteData Summary

Removes a specified range of characters from the node.

Method of dom/CharacterDatadom/CharacterData

Syntax
 textualNode.deleteData(offset, count);
Parameters offset
Data-type
String

The zero-based character offset from which to start.

count
Data-type
String

The number of characters to remove.

Return Value

No return value

Examples

var phrase = document.createTextNode ("A flawed plan today is not better than a perfect plan tomorrow.");

phrase.deleteData(23, 4);

alert(phrase.data);
Usage
 Upon success of this method, the data and length properties reflect the change.
Related specifications
DOM Level 3 Core
Recommendation
Attributions

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