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Javascript Regular Expresssion, Learn JavaScript Syntax
Regular expressions is a powerful way of doing search and replace in any strings, a regular expression describes a pattern of characters.
Patterns and flags
Slashes "/" indicate JavaScript that we are starting a regular expression, just like quotes for strings.
Modifiers
Brackets
Bracket is used for finding a range of characters:
Methods of RegExp and String
Patterns and flags
Slashes "/" indicate JavaScript that we are starting a regular expression, just like quotes for strings.
var str = "WebTrainingRoom.Com is a eLearning Platform";
var wtrRegExp=/WebTrainingRoom/i
var wtrRegExp=/WebTrainingRoom/i
Modifiers
| Modifier | Description |
| i | Perform case-insensitive matching |
| g | Perform a global match (find all matches in given string rather than stopping after first match) |
| m | Perform multiline matching |
Brackets
Bracket is used for finding a range of characters:
| Expression | Description |
| [xyz] | Find any character between the brackets |
| [^xyz] | Find any character NOT between the brackets |
| [0-9] | Find any character between the brackets (any digit) |
| [^0-9] | Find any character NOT between the brackets (any non-digit) |
| (a|b) | Find any of the alternatives specified |
str.search(reg)
str.match(reg)
str.match(reg)
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Javascript Regular Expresssion, Learn JavaScript Syntax
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