Use of the replace method syntax in Javascript

Stringobj is required. String object or text to be replaced. This object will not be modified by the replace method.
Rgexp is required. A regular expression object that describes the content to be searched.
Replacetext is required. Is a String object or text. For each position in stringobj that matches rgexp, it is replaced by the text contained in this object.
The following example demonstrates the replace method usage:
Function replacedemo ()
{
VaR R, RE;
VaR S = "The quick brown fox jumped over the lazy yellow dog .";
Re =/Fox/I;
R = S. Replace (Re, "pig ");
Return (R );
}
In addition, the replace method can replace the subexpression in the mode. The following example demonstrates each pair of words in the exchange string:
Function replacedemo ()
{
VaR R, RE;
VaR S = "The quick brown fox jumped over the lazy yellow dog .";
Re =/(\ s +)/g;
R = S. Replace (Re, "$3 $2 $1"); // exchange each pair of words.
Return (R );
}
If the Replace () method in Javascript uses Str. Replace ("-","! ") Only the first matched character. Str. Replace (/\-/g ,"! "), You can replace all matched characters (G is the global flag ).