Modifiers

Modifiers in regular expressions are used to change the matching behavior. They are added to the end of a regular expression and affect how the pattern is matched against the input text.

Here are some commonly used modifiers:

• i: Case-insensitive matching. This modifier allows the pattern to match both lowercase and uppercase characters. For example, /hello/i would match both 'hello' and 'Hello'.

• g: Global matching. This modifier allows the pattern to match multiple occurrences of the pattern in the input text. Without this modifier, the pattern matches only the first occurrence. For example, /o/g would match both 'o' characters in the text 'Hello World'.

• m: Multi-line matching. This modifier allows the pattern to match across multiple lines. Without this modifier, the pattern matches only within a single line of text.

It's important to choose the right modifiers based on the matching behavior you want to achieve. Adding modifiers can make your regular expressions more flexible and powerful.

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const text = 'Hello World';

const pattern = /hello/;

console.log(pattern.test(text));

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// Output: false