The substr () method in JavaScript uses the detailed

Source: Internet
Author: User

This article mainly introduces the JavaScript in the substr () method of using the detailed, is the basic knowledge of JS learning, need friends can refer to the

This method returns the character in a string at the specified position by the specified number of characters.

Grammar

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1 String.substr (start[, length]);

The following are the details of the parameters:

Start: Extract character at position (a length of 0 and integer less than string)

Length: The number of characters to use to extract

Note: If start is a negative number, SUBSTR uses it as an index from the end character of the string

return value:

The Substr method returns a new substring based on the given argument

Example:

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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17-18

This will produce the following results:

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