JavaScript Learning Notes-Reference type REGEXP

Four REGEXP

Format:

var expression =/pattern/flags;

1.flags is a sign. Are G, I, M respectively.

G: Represents the global pattern. That is, the pattern will match all the strings, not stop immediately when the first match is found.

I: indicates case insensitive.

M: represents multiline mode, which will continue to look for the next line when it reaches the end of a line of text.

Properties of 2.REGEXP Instances

Global: Whether the G mark is set;

IgnoreCase: Whether the I flag is set;

LastIndex: Indicates the character position at which to start searching for the next occurrence, starting from 0;

Multiline: Whether the M flag is set;

Source: A string representation of a pattern

var pattern =/\[bc\]at/i;alert (Pattern1.global);   Falsealert (pattern1.ignorecase);   True    alert ();   Falsealert ();   0alert ();   "\[bc\]at"

3.RegExp instance method

EXEC () receives 1 parameters. A string that applies a pattern to the drug.

var text = "Father and mother I love You";　　　　var pattern =/I love you/gi; var matched = pattern.exec (text);

JavaScript Learning Notes-Reference type REGEXP