Regular Expression (Regex) Modifier in Javascript

The javascript regex modifier controls and operates input data with the metacharacters and other regular expressions. The modifier works with the metacharacter and quantifiers to get the particular field. The search(), match(), test(), exec() method works with the regex modifier in javascript. The three modifiers work with the javascript regex method. We can set global sentences, case-insensitive, and other quantifiers with multiple lines.

Types of Regex Modifiers

Three modifiers are operating in the regex using the javascript method. This modifier is used to operate regex information with the input string.

• The g modifier: the modifier matches and searches the global input information.
• The i modifier: the modifier matches and searches the case-insensitive characters of the input information.
• The m modifier: multiline match the modifier matches, searches the multi-lines characters of the input information.

Js g (global) Modifier

This modifier searches global information for required regex. We can use other modifiers with the global modifier in the regex pattern.

Syntax:

The syntax uses a global modifier with the regex using the input string.

Description

• The g modifier is an optional value for the regex pattern but necessary for the entire string.

Examples

The following examples test and match with and without global modifiers.

Example 1:

The following example matches the basic global modifier. We can see the operation of the global modifier.

Output

The output shows available regular expression characters in the input data.

Example 2:

The following example matches the basic global modifier. We can see the difference between with or without global modifiers.

Output

The output shows a global regex modifier character in the input data.

Example 3:

The following example tests basic global modifiers. The test method shows the availability of the regex value.

Output

The output shows a global regex modifier character in the input data.

Example 4:

The following example uses a global keyword with the global modifier.

Output:

The output shows the availability of the global regex modifier.

Js i Modifier

This modifier searches case-insensitive information for required regex. Mostly, we can use modifiers with the global and multiline modifiers.

Syntax:

The syntax uses a case-insensitive modifier with the regex using the input string.

Description:

• The i modifier is an optional value for the regex pattern but necessary for the case-insensitive string.

Examples

The following examples test or match with and without case-sensitive modifiers.

Example 1:

The following example matches the basic case-sensitive modifier. We can see the operation of the case-sensitive modifier.

Output

The output shows available regular expression characters in the input data.

Example 2:

The following example matches the basic case-insensitive modifier. We can see the difference between with or without case-sensitive modifiers.

Output

The output shows available regular expression characters in the input data.

Example 3:

The following example tests an essential case-insensitive modifier. We use global and case-insensitive modifiers simultaneously using regex.

Output

The output shows available regular expression characters in the input data.

Example 4:

The following example tests a basic case-insensitive modifier.

Output

The output shows available regular expression characters in the input data.

Js m Modifier

This modifier searches multiline information for required regex. We can use other modifiers with multi-line modifiers using a regex pattern.

Syntax:

The syntax uses a multiline modifier with the regex using the input string.

Description and rules

• The "m" modifier indicates a multiline match.
• It only has an impact on start ^ and end $'s behavior.
• The "^" indicates a string match at the beginning.
• The symbol $ signifies a match for a string's conclusion.
• The characters and $ also match at the start and end of each line when the "m" setting is enabled.

Examples

The following examples test and match with and without multiline modifiers.

Example 1:

The following example matches the basic multiline modifier. We can see the operation of the multiline information with the modifier.

Output

The output shows available regular expression characters in the input data.

Example 2:

The following example matches the basic multiline modifier. We can see the difference between with or without multiline modifiers.

Output

The output shows the available required characters in the input data.

Example 3:

The following example tests a basic multiline modifier.

Output

The output shows the available required characters in the input data.

Example 4:

In the following example, check the last word using a multiline modifier. We can search the method keyword at the end of the line.

Output

Example 5:

The following example checks the basic multiline modifier.

Output

The output shows the available required characters in the input data.

Conclusion

In conclusion, the modifier helps to operate regex properly for the input data using JavaScript.