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substringData(offset, count)
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Parameters
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unsigned longoffset
Start offset of substring to extract.
unsigned longcount
The number of 16-bit units to extract.
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Returns
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String. The specified substring. If the sum of offset and count exceeds the length, then all 16-bit units to the end of the data are returned.
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Throws
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DOMException
INDEX_SIZE_ERR: Raised if the specified offset is negative or greater than the number of 16-bit units in data, or if the specified count is negative.
DOMSTRING_SIZE_ERR: Raised if the specified range of text does not fit into a DOMString.
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