js escape regex pattern characters

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const SPECIAL_CHARACTERS_EXPRESSION = /([.*+?^=!:${}()|\[\]\/\\])/g;

// Escapes regular expression pattern special characters in the indicated string.
//
const escapePattern = (pattern) => {
	return pattern.replace(SPECIAL_CHARACTERS_EXPRESSION, '\\$1');
};


// Usage example:

const pattern = escapePattern('.*');

console.log(pattern);  // '\.\*'