How does JavaScript verify that characters start with a letter

This article will explain in detail how JavaScript checks whether characters begin with letters. The editor thinks it is very practical, so I share it with you as a reference. I hope you can get something after reading this article.

Check whether the character begins with a letter

Verification rules:

Must start with a letter

The first letter is not case-sensitive.

Function letterBegin (str) {

Return / ^ [Amurz] / .test (str)

} what is JavaScript? JavaScript is a literal scripting language whose interpreter is called JavaScript engine and is part of the browser. JavaScript is a scripting language widely used on the client side. It was first used on HTML pages to add dynamic functions to HTML pages.

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