How to Check if String contains only Alphabets and Numbers in TypeScript - Step by Step Examples

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How to Check if String contains only Alphabets and Numbers in TypeScript ?

Answer

To check if a string contains only alphabets and numbers in TypeScript, you can use regular expressions.

✐ Examples

1 Check if String contains only Alphabets and Numbers using regular expression

In this example,

We create a regular expression pattern that matches alphabets and numbers only.
We use the test method of the regular expression to check if the string matches the pattern.
If the string contains only alphabets and numbers, containsOnlyAlphabetsAndNumbers will be true, otherwise false.
Finally, we log the result to the console.

TypeScript Program

const str: string = 'Hello123';
const pattern: RegExp = /^[a-zA-Z0-9]+$/;
const containsOnlyAlphabetsAndNumbers: boolean = pattern.test(str);
console.log(`String contains only alphabets and numbers: ${containsOnlyAlphabetsAndNumbers}`);

Output

String contains only alphabets and numbers: true

Summary

In this tutorial, we learned How to Check if String contains only Alphabets and Numbers in TypeScript language with well detailed examples.