Font optimization in Astro - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to import a Google font in Astro.

Astro

import [1] from '@astrojs/google-fonts';

Drag options to blanks, or click blank then click option'

AGoogleFonts

BGoogleFont

CFontGoogle

DFontsGoogle

Attempts:

3 left

💡 Hint

Common Mistakes

Using singular 'GoogleFont' instead of plural.

Swapping the order of words in the import name.

The correct import is GoogleFonts from '@astrojs/google-fonts'.

2fill in blank

medium

Complete the code to add the Roboto font with weights 400 and 700.

Astro

<GoogleFonts fonts=[1] />

Drag options to blanks, or click blank then click option'

A{ roboto: ['400', '700'] }

B{ Roboto: [400, 700] }

C{ roboto: [400, 700] }

D{ roboto: 400, 700 }

Attempts:

3 left

💡 Hint

Common Mistakes

Using capitalized font name key.

Passing weights as strings instead of numbers.

Not wrapping weights in an array.

The font name is lowercase roboto and weights are numbers in an array.

3fill in blank

hard

Fix the error in the font preload attribute to improve performance.

Astro

<GoogleFonts preload=[1] />

Drag options to blanks, or click blank then click option'

Atrue

B"true"

C"false"

Dfalse

Attempts:

3 left

💡 Hint

Common Mistakes

Passing preload as a string instead of boolean.

Using quotes around true or false.

The preload attribute expects a boolean true or false, not a string.

4fill in blank

hard

Fill both blanks to specify subsets and display strategy for font optimization.

Astro

<GoogleFonts fonts=[1] subsets=[2] />

Drag options to blanks, or click blank then click option'

A{ roboto: [400] }

B["latin"]

C["cyrillic"]

D{ openSans: [300, 600] }

Attempts:

3 left

💡 Hint

Common Mistakes

Using subsets as an object instead of an array.

Mixing font names and subsets in the same prop.

Use the font object for fonts and an array of subsets like ["latin"] for subsets.

5fill in blank

hard

Fill all three blanks to optimize font loading with display strategy and preload enabled.

Astro

<GoogleFonts fonts=[1] display=[2] preload=[3] />

Drag options to blanks, or click blank then click option'

A{ inter: [400, 700] }

B"swap"

Ctrue

D"block"

Attempts:

3 left

💡 Hint

Common Mistakes

Using quotes around boolean preload.

Passing display as a boolean instead of string.

Incorrect font object syntax.

Use the font object for fonts, a string like "swap" for display, and boolean true for preload.

Practice

1. What is the main benefit of using font optimization in Astro projects?

easy

A. It makes the website load faster and improves user experience.

B. It changes the font color automatically.

C. It removes all fonts from the website.

D. It increases the file size of font files.

Solution

1. Step 1: Understand font optimization purpose

   Font optimization aims to improve website speed and smoothness by managing font loading efficiently.

2. Step 2: Identify the correct benefit

   Among the options, only making the website load faster and improving user experience matches the purpose.

3. Final Answer:

   It makes the website load faster and improves user experience. -> Option A

4. Quick Check:

   Font optimization = faster load and better UX [OK]

Hint: Font optimization improves speed and user experience [OK]

Common Mistakes:

• Thinking font optimization changes font colors
• Believing it removes fonts entirely
• Assuming it increases font file size

2. Which is the correct way to use Astro's Font helper to preload a font with display swap?

easy

A. Font.load('/fonts/myfont.woff2', { display: 'block' });

B. import { Font } from '@astrojs/font'; const myFont = Font({ src: '/fonts/myfont.woff2', display: 'swap', preload: true });

C. const myFont = Font('/fonts/myfont.woff2', { preload: false });

D. import Font from 'astro-font'; Font({ src: '/fonts/myfont.ttf' });

Solution

1. Step 1: Check correct import and usage

   Astro's Font helper is imported from '@astrojs/font' and called with an object including src, display, and preload keys.

2. Step 2: Verify options for preload and display

   import { Font } from '@astrojs/font'; const myFont = Font({ src: '/fonts/myfont.woff2', display: 'swap', preload: true }); correctly uses preload: true and display: 'swap' which matches best practices.

3. Final Answer:

   import { Font } from '@astrojs/font'; const myFont = Font({ src: '/fonts/myfont.woff2', display: 'swap', preload: true }); -> Option B

4. Quick Check:

   Correct import and preload with display swap = import { Font } from '@astrojs/font'; const myFont = Font({ src: '/fonts/myfont.woff2', display: 'swap', preload: true }); [OK]

Hint: Use import from '@astrojs/font' and set preload: true [OK]

Common Mistakes:

• Wrong import path or syntax
• Using display: 'block' instead of 'swap'
• Not setting preload to true

3. Given this Astro code snippet, what will be the effect on font loading?

import { Font } from '@astrojs/font';
const roboto = Font({ src: '/fonts/roboto.woff2', display: 'swap', preload: true });

export default function Page() {
  return <h1 style={{ fontFamily: roboto.style }}>Hello</h1>;
}

medium

A. The font will load but without any optimization or preload.

B. Roboto font is not preloaded and causes a flash of invisible text.

C. The font will not load because of a syntax error.

D. Roboto font is preloaded and swaps smoothly when loaded, improving page speed.

Solution

1. Step 1: Analyze the Font helper usage

   The font is imported with preload: true and display: 'swap', which preloads the font and allows fallback text until font loads.

2. Step 2: Understand the effect on rendering

   Using display: 'swap' avoids invisible text and preload speeds up font availability, improving page speed and user experience.

3. Final Answer:

   Roboto font is preloaded and swaps smoothly when loaded, improving page speed. -> Option D

4. Quick Check:

   Preload + display swap = smooth font load [OK]

Hint: Preload true + display swap = smooth font loading [OK]

Common Mistakes:

• Assuming no preload causes no flash
• Thinking syntax error exists here
• Ignoring display: 'swap' effect

4. Identify the error in this Astro font optimization code:

import { Font } from '@astrojs/font';
const openSans = Font({ src: '/fonts/opensans.woff2', display: 'fallback', preload: 'yes' });

medium

A. The preload option should be a boolean, not a string.

B. The display option 'fallback' is invalid in Astro.

C. The src path must end with .ttf, not .woff2.

D. Font helper must be called with a string, not an object.

Solution

1. Step 1: Check preload option type

   Preload expects a boolean (true or false), but 'yes' is a string, causing an error.

2. Step 2: Validate other options

   Display: 'fallback' is valid CSS font-display value, .woff2 is a valid font format, and Font helper accepts an object.

3. Final Answer:

   The preload option should be a boolean, not a string. -> Option A

4. Quick Check:

   Preload must be true/false, not 'yes' [OK]

Hint: Preload must be true or false, never a string [OK]

Common Mistakes:

• Using string 'yes' instead of boolean true
• Thinking .woff2 is invalid
• Assuming display: 'fallback' is wrong

5. You want to optimize loading two fonts in Astro: one for headings and one for body text. You want headings to preload and use display swap, but body text font should load lazily without preload. Which code correctly implements this?

hard

A. import Font from '@astrojs/font';
const headingFont = Font('/fonts/heading.woff2', { preload: true });
const bodyFont = Font('/fonts/body.woff2', { preload: false });

B. import { Font } from '@astrojs/font';
const headingFont = Font({ src: '/fonts/heading.woff2', display: 'block', preload: true });
const bodyFont = Font({ src: '/fonts/body.woff2', display: 'swap', preload: true });

C. import { Font } from '@astrojs/font';
const headingFont = Font({ src: '/fonts/heading.woff2', display: 'swap', preload: true });
const bodyFont = Font({ src: '/fonts/body.woff2', display: 'swap', preload: false });

D. import { Font } from '@astrojs/font';
const headingFont = Font({ src: '/fonts/heading.ttf', display: 'fallback', preload: false });
const bodyFont = Font({ src: '/fonts/body.ttf', display: 'swap', preload: true });

Solution

1. Step 1: Check heading font requirements

   Heading font must preload and use display: 'swap'.

   import { Font } from '@astrojs/font';
   const headingFont = Font({ src: '/fonts/heading.woff2', display: 'swap', preload: true });
   const bodyFont = Font({ src: '/fonts/body.woff2', display: 'swap', preload: false });

   sets preload: true and display: 'swap' correctly.

2. Step 2: Check body font requirements

   Body font should load lazily without preload, so preload: false and display: 'swap' is correct in

   import { Font } from '@astrojs/font';
   const headingFont = Font({ src: '/fonts/heading.woff2', display: 'swap', preload: true });
   const bodyFont = Font({ src: '/fonts/body.woff2', display: 'swap', preload: false });

   .

3. Step 3: Verify other options

   Other options either preload body font incorrectly, use wrong display values, or wrong import syntax.

4. Final Answer:

   import { Font } from '@astrojs/font';
   const headingFont = Font({ src: '/fonts/heading.woff2', display: 'swap', preload: true });
   const bodyFont = Font({ src: '/fonts/body.woff2', display: 'swap', preload: false });

   -> Option C

5. Quick Check:

   Preload headings true, body false with display swap =

   import { Font } from '@astrojs/font';
   const headingFont = Font({ src: '/fonts/heading.woff2', display: 'swap', preload: true });
   const bodyFont = Font({ src: '/fonts/body.woff2', display: 'swap', preload: false });

   [OK]

Hint: Preload headings true, body false; use display swap [OK]

Common Mistakes:

• Preloading body font when it should be lazy
• Using display: 'block' instead of 'swap'
• Incorrect import or function call syntax