sass:string module - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to convert the string to uppercase using the sass:string module.

SASS

@use "sass:string";

$result: string.[1]("hello world");

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

Ato-upper-case

Bto-upper-case()

Cuppercase

Dto-upper

Attempts:

3 left

💡 Hint

Common Mistakes

Adding parentheses in the function name inside the code.

Using 'uppercase' instead of 'to-upper-case'.

Using 'to-upper' which is not a valid function.

The correct function to convert a string to uppercase in the sass:string module is to-upper-case without parentheses in the name.

2fill in blank

medium

Complete the code to check if the string "Sass" starts with the letter "S".

SASS

@use "sass:string";

$is-start: string.[1]("Sass", "S") == 1;

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

Aindex

Bstart-with

Chas-prefix

Dbegins-with

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'begins-with' which is not a valid function.

Using 'start-with' which is not a valid function.

Using 'has-prefix' which is not a sass:string function.

The correct function to check if a string starts with a substring is index in the sass:string module. It returns 1 if the substring starts at position 1.

3fill in blank

hard

Fix the error in the code to get the length of the string "Sass" using the sass:string module.

SASS

@use "sass:string";

$len: string.[1]("Sass");

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

Alen

Blength()

Clength

Dsize

Attempts:

3 left

💡 Hint

Common Mistakes

Adding parentheses in the function name.

Using 'len' which is not a sass:string function.

Using 'size' which is not a sass:string function.

The correct function to get the length of a string is length without parentheses in the name.

4fill in blank

hard

Complete the code to extract the substring "ass" from "Sass" using the sass:string module.

SASS

@use "sass:string";

$sub: string.[1]("Sass", 2, 4);

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

Acut

Bsubstr

Csubstring

Dslice

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'substr' as the function name instead of 'slice'.

Using 'substring' which is not a sass:string function.

Using 'cut' which is not a sass:string function.

The correct function to extract a substring is slice (1-based indices: slice("Sass", 2, 4) extracts "ass").

5fill in blank

hard

Fill all three blanks to replace all occurrences of "s" with "z" in "sass" using the sass:string module.

SASS

@use "sass:string";

$new-str: string.[1]("sass", "[2]", "[3]", 0, $flags: "i");

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

Areplace-all

Bs

Cz

Dreplace

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'replace-all' which is not a valid function.

Swapping the letters in the second and third blanks.

Not using the 'i' flag for case-insensitive replacement.

The function to replace all occurrences is replace (with 0 for $count to replace all), replacing 's' with 'z' ignoring case.

Practice

1. What is the main purpose of the sass:string module in Sass?

easy

A. To handle layout grids and flexbox

B. To create animations using keyframes

C. To manipulate and work with text strings in Sass stylesheets

D. To manage colors and gradients

Solution

1. Step 1: Understand the module's role

   The sass:string module provides functions to work with text strings, such as changing case or joining strings.

2. Step 2: Compare with other options

   Options A, B, and C relate to layout, animations, and colors, which are not the focus of the string module.

3. Final Answer:

   To manipulate and work with text strings in Sass stylesheets -> Option C

4. Quick Check:

   sass:string = text manipulation [OK]

Hint: Remember sass:string is for text, not colors or layout [OK]

Common Mistakes:

• Confusing string module with color or layout modules
• Thinking it handles animations
• Assuming it manages Sass variables

2. Which of the following is the correct way to import the string module in Sass?

easy

A. @use 'sass:string';

B. @import 'string';

C. @require 'sass:string';

D. @include 'string';

Solution

1. Step 1: Recall Sass module import syntax

   Modern Sass uses @use to import modules, so @use 'sass:string'; is correct.

2. Step 2: Identify incorrect options

   @import is deprecated for modules, @require and @include are invalid for importing modules.

3. Final Answer:

   @use 'sass:string'; -> Option A

4. Quick Check:

   Use @use for modules [OK]

Hint: Use @use 'sass:string'; to import string module [OK]

Common Mistakes:

• Using @import instead of @use
• Trying @require or @include which are invalid
• Forgetting quotes around module name

3. What will be the output of this Sass code?

@use 'sass:string';

$word: 'Hello';
$result: string.to-upper-case($word);

.test {
  content: $result;
}

medium

A. .test { content: 'HELLO'; }

B. .test { content: 'hello'; }

C. .test { content: 'Hello'; }

D. Error: to-upper-case is not a function

Solution

1. Step 1: Understand the function used

   string.to-upper-case() converts all letters in the string to uppercase.

2. Step 2: Apply function to input

   Input is 'Hello', output becomes 'HELLO'. The CSS rule sets content to 'HELLO'.

3. Final Answer:

   .test { content: 'HELLO'; } -> Option A

4. Quick Check:

   to-upper-case('Hello') = 'HELLO' [OK]

Hint: to-upper-case makes all letters uppercase [OK]

Common Mistakes:

• Confusing to-upper-case with to-lower-case
• Expecting original string unchanged
• Thinking function is undefined

4. Identify the error in this Sass code using the string module:

@use 'sass:string';

$greeting: 'Hi';
$new: string.append($greeting, 123);

.test {
  content: $new;
}

medium

A. Missing semicolon after $greeting declaration

B. Cannot append a number directly to a string

C. Module name should be 'string-module' not 'sass:string'

D. Function name should be string.concat, not string.append

Solution

1. Step 1: Check function usage

   string.append() expects string arguments, but 123 is a number, causing a type error.

2. Step 2: Verify other syntax

   Semicolons are correct, module name and function name are valid as per Sass string module.

3. Final Answer:

   Cannot append a number directly to a string -> Option B

4. Quick Check:

   string.append needs strings, not numbers [OK]

Hint: Append only strings, convert numbers first [OK]

Common Mistakes:

• Passing numbers without converting to strings
• Confusing function names
• Incorrect module import syntax

5. You want to create a Sass function that takes a string and returns it with the first letter capitalized and the rest lowercase. Which of these code snippets correctly uses the sass:string module to achieve this?

hard

A. @use 'sass:string';

@function capitalize($text) {
@return string.to-lower-case($text);
}

B. @use 'sass:string';

@function capitalize($text) {
@return string.to-lower-case(string.slice($text, 1, 1)) + string.to-upper-case(string.slice($text, 2));
}

C. @use 'sass:string';

@function capitalize($text) {
@return string.to-upper-case($text);
}

D. @use 'sass:string';

@function capitalize($text) {
@return string.to-upper-case(string.slice($text, 1, 1)) + string.to-lower-case(string.slice($text, 2));
}

Solution

1. Step 1: Understand the goal

   The function must uppercase the first letter and lowercase the rest of the string.

2. Step 2: Analyze each option

   @use 'sass:string'; @function capitalize($text) { @return string.to-upper-case(string.slice($text, 1, 1)) + string.to-lower-case(string.slice($text, 2)); } correctly slices the first character, uppercases it, then slices the rest and lowercases it, joining both parts.
   @use 'sass:string'; @function capitalize($text) { @return string.to-lower-case(string.slice($text, 1, 1)) + string.to-upper-case(string.slice($text, 2)); } reverses cases incorrectly.
   @use 'sass:string'; @function capitalize($text) { @return string.to-upper-case($text); } uppercases whole string.
   @use 'sass:string'; @function capitalize($text) { @return string.to-lower-case($text); } lowercases whole string.

3. Final Answer:

   Capitalizes the first letter and lowercases the rest -> Option D

4. Quick Check:

   First letter uppercase + rest lowercase = slice(1,1) upper + slice(2) lower [OK]

Hint: Slice first char uppercase, rest lowercase, then join [OK]

Common Mistakes:

• Applying case functions to whole string only
• Mixing up upper and lower case parts
• Not slicing string correctly