JavaScript string.replace () character substitution function

The replace () method replaces some characters in a string with some other characters, or replaces a substring that matches a regular expression.

Grammar
Stringobject.replace (regexp/substr,replacement) parameter description
Regexp/substr required. The RegExp object that prescribes the substring or pattern to be replaced.

Note that if the value is a string, it is used as the direct text pattern to retrieve, not first converted to the RegExp object.

Replacement required. A string value. Provides a function that replaces text or generates alternate text.

Simple usage of one string.replace ()
var text = "Web page special effects are very powerful!" Text.replace (/javascript/i, "JavaScript"); 14//back: JavaScript is very powerful!

String.Replace () Replaces all occurrences of the target character
var text= "JavaScript is very powerful! JAVASCRIPT is one of my favorite languages! Text.replace (/javascript/ig, "JavaScript"); 18//back: JavaScript is very powerful! JavaScript is one of my favorite languages!

String.Replace () to implement the swap position

var name= "Doe, John";
Name.replace (/(w+) s*,s* (w+)/, "$ $");
Back: John Doe

String.Replace () implementation replaces all double quotes with characters enclosed in brackets
The var text = ' JavaScript ' is very powerful! ' Text.replace ([^ "]*)"/g, "[$]"); 26//return: [JavaScript] very powerful!

String.Replace () capitalize all characters first letter

More about Replace function usage please refer to

Http://www.111cn.net/wy/99/js_replace_replaceall.htm