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One way to validate HTML forms is to use regular expressions, or regex, which are patterns of characters that can match, search, or replace text.
HTML5 offers form field validation support built into the HTML form input tags that should greatly reduce the need for JavaScript validation code. In this post, I look at some examples of this.
Current behavior User can type letter "e" in input type="number" fields and any value containing one or many letters "e" is considered valid. Also, having letters "e" in input breaks pattern ...
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