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As of writing, only Opera and Firefox support "Required" attribute of input textbox. 2017-07-31 · Published in: JavaScript Say you have an HTML form contain multiple fields - a mix of textarea, text input, radio button, drop downs (SELECT) and/or check boxes - and some of these fields are required. That is, if the user submits the forms, the browser should display an alert (or an inline message) saying that required fields are missing. Public static fields are useful when you want a field to exist only once per class, not on every class instance you create. This is useful for caches, fixed-configuration, or any other data you don't need to be replicated across instances. Public static fields are declared using the static keyword.

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You'll want to instead code this in Visualforce; make the field required based on the input of the other element. About Press Copyright Contact us Creators Advertise Developers Terms Privacy Policy & Safety How YouTube works Test new features Press Copyright Contact us Creators Form validation is one of the most common web development tasks. There are many ways to do form validation, but JavaScript is one of the best and easiest way The :required CSS pseudo-class represents any ,