Playground workflow

Last reviewed May 28, 2026 Content v20260528

Track mode

client_angularjs

Means

In-browser AngularJS 1.x

Reading

~1 min

Level

beginner

This lesson

This lesson teaches Playground workflow: the concepts, APIs, and habits you need before advancing in AngularJS.

Without Playground workflow, you will struggle to read or extend AngularJS codebases and playground exercises.

You will apply Playground workflow in contexts like: Long-lived intranet apps, government portals, and codebases not yet moved to Angular, React, or Vue.

Write JavaScript for AngularJS 1.8, click Run—register modules/controllers, then mountApp(moduleName, templateHtml) in #ng-app; printOutput feeds the terminal.

At the start of the track—complete before JSX-heavy lessons that assume you understand the playground.

Register angular.module and MainCtrl, then mountApp(moduleName, templateHtml) to bootstrap in #ng-app; use printOutput for terminal values.

Recommended workflow

Read the concept before editing code.
Click Run in browser.
Use printOutput(...) for terminal inspection.
For UI: var app = angular.module('playgroundApp', []); then mountApp('playgroundApp', '<div>...</div>');

Important interview questions and answers

Q: Why does this matter?
A: Register angular.module and MainCtrl, then mountApp(moduleName, templateHtml) to bootstrap in #ng-app; use printOutput for terminal values.

Self-check

Summarize Playground workflow in one sentence.
What would you try next in the playground?

Challenge

First run

Run default code.
Confirm angular.version prints.

Done when: terminal shows AngularJS version string.

Playground

Runs in your browser in a sandboxed frame. Backend runners appear when this track’s profile allows them.

Discussion

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Starter discussion topics

mountApp args?
MainCtrl convention?

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