![]() We will implement the same example of the form with only one input as the name element. Let’s see the example of form validation using JavaScript. But it is necessary to know JavaScript to implement this compared to form validation using built-in tags. JavaScript is more flexible in this way because there is no restriction on defining rules. We can implement any logic required for achieving the validation rules. In JavaScript form validation, basically, we define functions to validate the data before submitting it to the server. JavaScript is being used for a long time for form validation. JavaScript is used widely for HTML form validation as it provides more ways to customize and set the validation rules also, some of the tags provided in HTML5 are not supported in the older versions of Internet Explorer.
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