JavaScript Form Validation || Client Side Scripting || BCIS Notes

JavaScript Form Validation || Client Side Scripting || BCIS Notes

JavaScript Form Validation

HTML form validation can be done by JavaScript. If a form field (fname) is empty, this function alerts a message, and returns false, to prevent the form from being submitted:

JavaScript Form Validation

JavaScript Can Validate Numeric Input

JavaScript is often used to validate numeric input:

Constraint Validation DOM Methods

If an input field contains invalid data, display a message:

The checkValidity() Method

The checkValidity() Method

Smart Forms:

  • Smart forms are a digital tool used to capture information online.
  • They combine the functions of paperwork/online forms with UX/websitedesign to make the information as easy as possible for users to provide…… and do so in a flexible and dynamic way, allowing the data can be manipulated or used however and wherever organizations want.

Smart forms make processes better and allow organizations
like banks and insurance companies to bring a better user experience to their front end without overhauling (or even changing) their back end processes.

Since smart forms are a digital tool, there’s plenty of added functionality to provide a better user experience beyond only showing questions that are relevant to the user. For example, our forms can:
  • Pre-fill and auto-fill information from external sources, reducing how long it takes for forms to be completed.
  • Create questions that can be answered in different ways like multiple-choice, fill-in-the-blank, select from a dropdown, choose a picture, move a slider, select multiple options, or just type in an answer.
  • Validate answers with masks/pre-set validation rules, so users can’t enter incorrect information by accident (e.g. SIN number validators, so you can’t accidentally type your SIN incorrectly).

If you liked our content JavaScript Form Validation, then you will also like DOM Elements in JavaScript

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