Add to Your App

You are building an app and want to add one specific feature. Find the matching page below. Every page opens with a working example you can adapt.

Pages and navigation

• Add and connect pages: add more pages, connect them with buttons and links, and offer a way back.
• Show different content: build one page that changes with the situation.
• Add live behavior: react to typing without a full page change.

Information

• Ask the user for information: collect input with text boxes, checkboxes, and dropdowns.
• Remember a score or choice: keep values between clicks and across pages.
• Show a collection of items: display lists and tables built from your data.
• Use pictures: show, upload, and edit images.
• Upload and download files: move files into and out of your app.

Appearance

• Change the appearance: choose among themes, styling helpers, and CSS, ordered by effort.
• Embed HTML: use raw HTML when components are not enough.
• Make things happen over time: add countdowns, ticks, and clocks.

Quality

• Test a feature: write focused tests for your routes.
• Freeze finished pages: generate regression tests automatically from pages you approve.

How these pages work

Each task page follows the same shape: the smallest working example comes first, then variations, then common problems. Every page ends with the same four links:

• Understand it leads to the concept behind the recipe.
• See another example shows the same idea in a different app.
• Look it up gives the exact parameters in the reference.
• Fix a problem covers the errors this feature usually produces.