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css

Width and Height

7 roles need it, 3 as coreUsually level 3: WorkingLesson available

Where it sits

Learn first

Relative unitsAbsolute units

This skill

Width and Height

Leads to

Box ModelIntroduction to Flexbox

Jobs that need it

What level 3 (Working) means

Uses it independently on the job. Level 4 (Strong): handles hard cases, reviews others.

Start learning

Percentages

Setting Size with Percentages

14 parts

Open the lesson

Find out where you stand

A free check, then a route that starts at your level.

Check my readiness

Learned alongside it

Absolute unitsAttribute selectors and Universal selectorBackgroundBackground ColorBasic propertiesBEMBlock-level elementsBorder

Width and Height: common questions

What is Width and Height?

Width and Height is a skill in css, needed by 7 roles on BootSelf.

Which jobs need Width and Height?

Frontend Developer (Angular), Frontend Developer (React), Frontend Developer (Vue), Full Stack Developer (Java + React), Full Stack Developer (MEAN), and 2 more. Most ask for level 3 (Working): uses it independently on the job.

What should I learn before Width and Height?

Relative units, Absolute units.

How do I practise Width and Height?

Check your readiness for free, then BootSelf builds a route and short daily learning loops: a little theory, checks on what you get wrong, then a small program.