.replace()

The .replace() method returns a string with a portion replaced by another string, or a portion of another string.

baseString.replace(pos, len, str, subpos, sublen)

• baseString is the string whose contents are being replaced.
• pos is the zero-based starting position of the replacement.
• len is the number of characters to be replaced.
• str is the replacement string.
• subpos is optional, and is the zero-based starting point of the replacement characters used from str.
• sublen is optional, and is the number of replacement characters used from str.

If subpos and sublen aren’t specified, the entire str is used for the replacement.

The following example replaces a portion of a base string with a portion of another string:

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