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CharacterData: substringData() method

files/en-us/web/api/characterdata/substringdata/index.md

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{{APIRef("DOM")}}

The substringData() method of the {{domxref("CharacterData")}} interface returns a portion of the existing data, starting at the specified index and extending for a given number of characters afterwards.

Syntax

js-nolint
substringData(offset, count)

Parameters

  • offset
    • : The index of the first character to include in the returned substring. 0 is the first character of the string.
  • count
    • : The number of characters to return.

Return value

A string with the substring.

Exceptions

  • IndexSizeError {{domxref("DOMException")}}
    • : Thrown if offset + count is larger than the length of the contained data.

Specifications

{{Specifications}}

Browser compatibility

{{Compat}}