iOS Developer Salary: Your 2025 Guide
January 6, 2025
Article · 7 min read
Instructor: Judy Richardson
1,654 already enrolled
Included with
(10 reviews)
Recommended experience
Intermediate level
Basic knowledge of JavaScript and HTML (with exposure to forms) is recommended.
(10 reviews)
Recommended experience
Intermediate level
Basic knowledge of JavaScript and HTML (with exposure to forms) is recommended.
Explain the importance of verifying the data values entered on a form.
Write JavaScript code that validates values entered on an HTML form.
Demonstrate techniques for validating values entered on a form using HTML built-in validation.
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Only available on desktop
By the end of this project, you will have written and tested JavaScript and HTML code that validates data values entered into input fields on an HTML form. Data validation is a valuable skill in web development. Notifying users of input errors not only improves the user experience it also helps to ensure that any data collected via a form is as accurate as possible before sending it to a server for processing.
Note: This course works best for learners who are based in the North America region. We’re currently working on providing the same experience in other regions.
In a video that plays in a split-screen with your work area, your instructor will walk you through these steps:
Compare client- and server-side validation as you investigate when and where to validate data values to reduce data input errors.
Use JavaScript code to check an input field on a form to ensure that it has been filled in and display an error message if the field is empty.
Use JavaScript to test the value entered into a form field to determine its length and/or whether it falls within a range of numeric values and display an error message if that is not the case.
Test the value entered into a form to ensure that it matches an email address format and display an error message if it does not.
Modify HTML code to include built in form validation to check for a range of numbers, a list of values and the correct format for an email address.
Basic knowledge of JavaScript and HTML (with exposure to forms) is recommended.
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Available only on desktop
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University of California, Davis
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Coursera Project Network
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Scrimba
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Infosec
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By purchasing a Guided Project, you'll get everything you need to complete the Guided Project including access to a cloud desktop workspace through your web browser that contains the files and software you need to get started, plus step-by-step video instruction from a subject matter expert.
Because your workspace contains a cloud desktop that is sized for a laptop or desktop computer, Guided Projects are not available on your mobile device.
Guided Project instructors are subject matter experts who have experience in the skill, tool or domain of their project and are passionate about sharing their knowledge to impact millions of learners around the world.
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At the top of the page, you can press on the experience level for this Guided Project to view any knowledge prerequisites. For every level of Guided Project, your instructor will walk you through step-by-step.
Yes, everything you need to complete your Guided Project will be available in a cloud desktop that is available in your browser.
You'll learn by doing through completing tasks in a split-screen environment directly in your browser. On the left side of the screen, you'll complete the task in your workspace. On the right side of the screen, you'll watch an instructor walk you through the project, step-by-step.