Validation Notes

A Pre Launch Checklist

Everything worth verifying before a page goes live, grouped so it can be worked through in about twenty minutes.

A Working Setup: Formatting, Linting and Live Preview

Consistent formatting, markup linting, live reload and shared settings. A day of setup that pays back on every file afterwards.

HTML

Debugging Common HTML Problems

A symptom to cause lookup for the problems that come up repeatedly, and the two minute checks that resolve most of them.

HTML

Validating HTML

The validator catches nesting errors, duplicate ids and missing attributes in seconds. A page that renders is not the same as a page that is correct.

HTML

Testing a Page for Accessibility

Automated tools find about a third of problems. Here is what they catch, what they miss, and a manual routine that takes fifteen minutes.

HTML

Forms and JavaScript

Read values, submit without a page reload, validate with the built in API, and handle errors accessibly. All of it built on a real form element.

HTML

Built In Form Validation

The browser can check most of a form before it is sent, with no JavaScript. Learn the attributes, the CSS hooks, and why none of it replaces server va...