The country flags are a combination of regional symbol indicator letters” (🇯 + 🇵), the emoji followed by a skin tone modifier is again a combination and the family one is a combination of 4 different emojis. The includes() method performs a case-sensitive search to determine whether one string may be found within another string, returning true or false as appropriate. The forward slashes / / mark the beginning and end of the regular expression. We called the RegExp.test method to check if the string contains only letters and numbers. Definition and Usage The includes () method returns true if a string contains a specified string. Check if a String contains any Letters in JavaScript If you need to also allow spaces, hyphens, underscores, or other characters, scroll down to the next code snippet.
And JavaScript regular expressions have a Unicode mode now, so we can use Unicode property escapes to check for various things like emojis and currency symbols. JavaScript String includes () Previous JavaScript String Reference Next Examples Check if a string includes 'world': let text 'Hello world, welcome to the universe.' let result text.includes('world') Try it Yourself More examples below.
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