Regular expression attributes

The following table lists allowable attribute characters and their effects on a regular expression. No other characters are allowed as attributes.

Character	Attribute meaning
g	Do a global match. Allow the finding of all matches in a string using the RegExp and String methods and properties that allow global operations. The instance property global is set to true. Example: /pattern/g
i	Do case insensitive matches. The instance property ignoreCase is set to true. Example: /pattern/i
m	Work with multiple lines in a string. When working with multiple lines the "^" and "$" anchor characters will match the start and end of a string and the start and end of lines within the string. The newline character "\n" in a string indicates the end of a line and hence lines in a string. The instance property multiline is set to true. Example: /pattern/m

Attributes are the characters allowed after the end slash "/" in a regular expression pattern. The following regular expressions illustrate the use of attributes.

var pat = /^The/i; // any form of "the" at start of a string

var pat = /the/g; // all occurrences of "the" may be found

var pat = /test$/m; // first "test" at the end of any line

var pat = /test$/igm; // all forms of "test" at end of all lines

// The following four examples do the same as the first four

var pat = new RegExp("^The", "i");

var pat = new RegExp("the", "g");

var pat = new RegExp("test$", "m");

var pat = new RegExp("test$", "igm");

Regular expression special characters