Bootstrap Research & Evidence-Based Practice 2

Question 1

When researching Bootstrap browser compatibility, which official resource provides the most authoritative list of supported browsers?

Accepted Answer

The browserslist file in Bootstrap's repository

Answer

Bootstrap's repository includes a browserslist config file that explicitly defines the supported browser targets used during compilation.

Question 2

A developer wants evidence-based data on Bootstrap's bundle size impact. Which approach best quantifies the cost of including Bootstrap's full CSS?

Accepted Answer

Running bundlephobia.com or a local webpack-bundle-analyzer report

Answer

Tools like bundlephobia.com and webpack-bundle-analyzer provide actual gzip/brotli size metrics, giving objective evidence of the bundle cost.

Question 3

Which Bootstrap documentation section should a developer consult first when researching whether a component meets WCAG 2.1 AA accessibility standards?

Accepted Answer

Each component's own 'Accessibility' sub-section in the docs

Answer

Bootstrap's component documentation includes an 'Accessibility' sub-section for each component that notes ARIA attributes and known limitations.

Question 4

A team is evaluating whether to upgrade from Bootstrap 4 to Bootstrap 5. Which document is the authoritative source for breaking changes?

Accepted Answer

The official Bootstrap migration guide

Answer

Bootstrap publishes an official migration guide that exhaustively lists all breaking API, class, and variable changes between major versions.

Question 5

When assessing evidence for whether PurgeCSS meaningfully reduces Bootstrap's production CSS size, what is the most reliable method?

Accepted Answer

Measuring file size before and after PurgeCSS in a controlled build

Answer

A controlled before-and-after file size comparison after running PurgeCSS provides empirical, reproducible evidence of size reduction.

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Bootstrap Practice Test

Bootstrap Research & Evidence-Based Practice 2