# @wezom/toolkit-css-in-js

> _Useful tools for working with CSS-in-JS_

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## Table of Content:

1. [Tools](#usage)
    - [Absolute position](#absolute-position)
        - [`jssAbsoluteCenter()`](#jssabsolutecenter)
        - [`jssAbsoluteGap()`](#jssabsolutecenter)
        - [`jssAbsoluteSquare()`](#jssabsolutecenter)
    - [Dividers](#dividers)
        - [`jssSplitAndChangeJoiner()`](#jsssplitandchangejoiner)
        - [`jssChangeJoiner()`](#jsschangejoiner)
    - [CSS min-max](#css-min-max)
        - [`jssClamp()`](#jssclamp)
        - [`jssClampHack()`](#jssclamphack)
        - [`jssMax()`](#jssmax)
        - [`jssMin()`](#jssmin)
    - [CSS units](#css-units)
        - [`jssConvertPixels()`](#jssconvertpixels)
        - [`jssEm()`](#jssem)
        - [`jssRem()`](#jssrem)
        - [`jssRemWithSize()`](#jssremwithsize)
        - [`jssSetPreDefinedRemSize()`](#jsssetpredefinedremsize)
        - [`jssPercentage()`](#jsspercentage)
        - [`jssUnitExtract()`](#jssunitextract)
        - [`jssUnitLess()`](#jssunitless)
        - [`jssUnitRevertSign()`](#jssunitrevertsign)
    - [Borders](#borders)
        - [`jssBorder()`](#jssborder)
    - [Fonts](#fonts)
        - [`jssFontFaceSrc()`](#jssfontfacesrc)
    - [Custom Properties](#custom-properties)
        - [`jssVar()`](#jssvar)
2. [Contributing](#contributing)
3. [License](#licence)

---

## Tools

### Absolute position

#### `jssAbsoluteCenter()`

[comment]: <> (AUTODOC-TOOL-START::absolute-center#jssAbsoluteCenter)

Generate CSS properties for absolute centering

_Parameters:_

| Name   | Data type                                       | Argument   | Default value | Description |
| ------ | ----------------------------------------------- | ---------- | ------------- | ----------- |
| width  | `string`                                        |            |               |
| height | `string`                                        | _optional_ | `...`         |
| corner | `topLeft │ topRight │ bottomRight │ bottomLeft` | _optional_ | `'topLeft'`   |

_Returns:_

```ts
{
  top?: string;
  bottom?: string;
  left?: string;
  right?: string;
  width: string;
  height: string;
  margin: string
}
```

_Examples:_

```ts
 jssAbsoluteCenter('3rem');
 // returns
 {
     top: '50%',
     left: '50%',
     width: '3rem',
     height: '3rem',
     margin: '-1.5rem 0 0 -1.5rem'
 }

 jssAbsoluteCenter('4rem', '60px');
 // returns
 {
     top: '50%',
     left: '50%',
     width: '4rem',
     height: '60px',
     margin: '-30px 0 0 -2rem'
 }

 jssAbsoluteCenter('100px', '100px', 'topRight);
 // returns
 {
     top: '50%',
     right: '50%',
     width: '100px',
     height: '100px',
     margin: '-50px -50px 0 0'
 }

 jssAbsoluteCenter('100px', '100px', 'bottomRight);
 // returns
 {
     bottom: '50%',
     right: '50%',
     width: '100px',
     height: '100px',
     margin: '0 -50px -50px 0'
 }

 jssAbsoluteCenter('100px', '100px', 'bottomLeft);
 // returns
 {
     bottom: '50%',
     right: '50%',
     width: '100px',
     height: '100px',
     margin: '0 0 -50px -50px'
 }

```

[comment]: <> (AUTODOC-TOOL-END)

---

#### `jssAbsoluteGap()`

[comment]: <> (AUTODOC-TOOL-START::absolute-gap#jssAbsoluteGap)

_Parameters:_

| Name | Data type | Argument   | Default value | Description |
| ---- | --------- | ---------- | ------------- | ----------- |
| x    | `string`  |            |               |
| y    | `string`  | _optional_ | `...`         |

_Returns:_

```ts
{
	width: auto;
	height: auto;
	top: string;
	right: string;
	bottom: string;
	left: string;
}
```

_Examples:_

```ts
 jssAbsoluteGap('10px');
 // returns
 {
     width: 'auto',
     height: 'auto',
     top: '10px',
     right: '10px',
     bottom: '10px',
     left: '10px'
 }

 jssAbsoluteGap('10px', '2em');
 // returns
 {
     width: 'auto',
     height: 'auto',
     top: '10px',
     right: '2em',
     bottom: '10px',
     left: '2em'
 }

```

[comment]: <> (AUTODOC-TOOL-END)

---

#### `jssAbsoluteSquare()`

[comment]: <> (AUTODOC-TOOL-START::absolute-square#jssAbsoluteSquare)

_Parameters:_

| Name    | Data type                                       | Argument   | Default value | Description |
| ------- | ----------------------------------------------- | ---------- | ------------- | ----------- |
| percent | `string │ number`                               |            |               |
| corner  | `topLeft │ topRight │ bottomRight │ bottomLeft` | _optional_ | `'topLeft'`   |

_Returns:_

```ts
{
  top?: string;
  bottom?: string;
  left?: string;
  right?: string;
  width: string;
  height: string
}
```

_Examples:_

```ts
 jssAbsoluteSquare(54);
 // returns
 {
     top: '23%',
     left: '23%',
     width: '54%',
     height: '54%'
 }

 jssAbsoluteSquare(100);
 // returns
 {
     top: '0%',
     left: '0%',
     width: '100%',
     height: '100%'
 }

 jssAbsoluteSquare('120%');
 // returns
 {
     top: '-10%',
     left: '-10%',
     width: '120%',
     height: '120%'
 }

 jssAbsoluteSquare('120%', 'topRight');
 // returns
 {
     top: '-10%',
     right: '-10%',
     width: '120%',
     height: '120%'
 }

 jssAbsoluteSquare('120%', 'bottomRight');
 // returns
 {
     bottom: '-10%',
     right: '-10%',
     width: '120%',
     height: '120%'
 }

 jssAbsoluteSquare('120%', 'bottomLeft');
 // returns
 {
     bottom: '-10%',
     left: '-10%',
     width: '120%',
     height: '120%'
 }

```

[comment]: <> (AUTODOC-TOOL-END)

---

### Dividers

#### `jssSplitAndChangeJoiner()`

[comment]: <> (AUTODOC-TOOL-START::dividers#jssSplitAndChangeJoiner)

Low level method

_Parameters:_

| Name    | Data type | Argument | Default value | Description |
| ------- | --------- | -------- | ------------- | ----------- |
| string  | `string`  |          |               |
| splitBy | `string`  |          |               |
| joiner  | `string`  |          |               |

_Returns:_ `string`

_Examples:_

```ts
jssChangeJoiner('0 4px auto', ' ', ', '); // => '0, 4px, auto'
jssChangeJoiner('0 4px auto', ' ', '~*~'); // => '0~*~4px~*~auto' ;)
```

[comment]: <> (AUTODOC-TOOL-END)

---

#### `jssChangeJoiner()`

[comment]: <> (AUTODOC-TOOL-START::dividers#jssChangeJoiner)

High level joiner from `' '` to new value

_Parameters:_

| Name   | Data type | Argument   | Default value | Description |
| ------ | --------- | ---------- | ------------- | ----------- |
| string | `string`  |            |               |
| joiner | `string`  | _optional_ | `', '`        |

_Returns:_ `string`

_Examples:_

```ts
jssChangeJoiner('0 4px auto'); // => '0, 4px, auto'
jssChangeJoiner('0 4px auto', '~*~'); // => '0~*~4px~*~auto' ;)
```

[comment]: <> (AUTODOC-TOOL-END)

---

### CSS min-max

---

#### `jssClamp()`

[comment]: <> (AUTODOC-TOOL-START::min-max-clamp#jssClamp)

Generate css math function `clap(min, val, max)`

_Parameters:_

| Name | Data type | Argument | Default value | Description |
| ---- | --------- | -------- | ------------- | ----------- |
| min  | `Operand` |          |               |
| val  | `Operand` |          |               |
| max  | `Operand` |          |               |

_Returns:_ `string`

_Examples:_

```ts
jssClamp('10px', '5vw', '50px'); // 'clamp(10px, 5vw, 50px)'
jssClamp(jssRem(24), '10%', jssRem(64)); // 'clamp(1.5rem, 10%, 4rem)'
```

[comment]: <> (AUTODOC-TOOL-END)

---

#### `jssClampHack()`

[comment]: <> (AUTODOC-TOOL-START::min-max-clamp#jssClampHack)

Generate css math function-hack `max(x, min(y, z))` instead `clamp(z, y, x)`

_Parameters:_

| Name | Data type | Argument | Default value | Description |
| ---- | --------- | -------- | ------------- | ----------- |
| min  | `Operand` |          |               |
| val  | `Operand` |          |               |
| max  | `Operand` |          |               |

_Returns:_ `string`

_Examples:_

```ts
jssClamp('10px', '5vw', '50px'); // 'max(10px, min(5vw, 50px))'
jssClamp(jssRem(24), '10%', jssRem(64)); // 'max(1.5rem, min(10%, 4rem))'
```

[comment]: <> (AUTODOC-TOOL-END)

---

#### `jssMax()`

[comment]: <> (AUTODOC-TOOL-START::min-max-clamp#jssMax)

Generate css math function `max(a, b)`

_Parameters:_

| Name | Data type | Argument | Default value | Description |
| ---- | --------- | -------- | ------------- | ----------- |
| a    | `Operand` |          |               |
| b    | `Operand` |          |               |

_Returns:_ `string`

_Examples:_

```ts
jssMax('5vw', '50px'); // 'max(5vw, 50px)'
jssMax('5vw', jssRem(64)); // 'max(5vw, 4rem)'
```

[comment]: <> (AUTODOC-TOOL-END)

---

#### `jssMin()`

[comment]: <> (AUTODOC-TOOL-START::min-max-clamp#jssMin)

Generate css math function `min(a, b)`

_Parameters:_

| Name | Data type | Argument | Default value | Description |
| ---- | --------- | -------- | ------------- | ----------- |
| a    | `Operand` |          |               |
| b    | `Operand` |          |               |

_Returns:_ `string`

_Examples:_

```ts
jssMin('5vw', '50px'); // 'min(5vw, 50px)'
jssMin('5vw', jssRem(64)); // 'min(5vw, 4rem)'
```

[comment]: <> (AUTODOC-TOOL-END)

---

### CSS units

#### `jssConvertPixels()`

[comment]: <> (AUTODOC-TOOL-START::em-rem#jssConvertPixels)

Low level converter

_Parameters:_

| Name   | Data type      | Argument | Default value | Description |
| ------ | -------------- | -------- | ------------- | ----------- |
| size   | `number`       |          |               |
| pixels | `PixelValue[]` |          |               |
| unit   | `Units`        |          |               |
| joiner | `Joiner`       |          |               |

_Returns:_ `string`

[comment]: <> (AUTODOC-TOOL-END)

---

#### `jssEm()`

[comment]: <> (AUTODOC-TOOL-START::em-rem#jssEm)

High level converter from px to em

_Parameters:_

| Name   | Data type         | Argument | Default value | Description |
| ------ | ----------------- | -------- | ------------- | ----------- |
| emSize | `number`          |          |               |
| pixels | `...PixelValue[]` |          |               |

_Returns:_ `string`

_Examples:_

```ts
jssEm(16, 16); // => '1em'
jssEm(16, 16, 'auto'); // => '1em auto'
jssEm(16, -8, 0); // => '-0.5em 0'
jssEm(16, 24, 32, 48); // => '1.5em 2em 3em'
jssEm(20, 30, 10, 45); // => '1.5em 0.5em 2.25em'
```

[comment]: <> (AUTODOC-TOOL-END)

---

#### `jssRem()`

[comment]: <> (AUTODOC-TOOL-START::em-rem#jssRem)

High level converter from px to rem with pre-defined rem size
By default rem size used as 16px;

_Parameters:_

| Name   | Data type         | Argument | Default value | Description |
| ------ | ----------------- | -------- | ------------- | ----------- |
| pixels | `...PixelValue[]` |          |               |

_Returns:_ `string`

_Examples:_

```ts
jssRem(16); // => '1rem'
jssRem(16, 'auto'); // => '1rem auto'
jssRem(-8, 0); // => '-0.5rem 0'
jssRem(24, 32, 48); // => '1.5rem 2rem 3rem'
jssRem(30, 10, 45); // => '1.5rem 0.5rem 2.25rem'
```

[comment]: <> (AUTODOC-TOOL-END)

---

#### `jssRemWithSize()`

[comment]: <> (AUTODOC-TOOL-START::em-rem#jssRemWithSize)

High level converter from px to rem, with custom rem size

_Parameters:_

| Name    | Data type         | Argument | Default value | Description |
| ------- | ----------------- | -------- | ------------- | ----------- |
| remSize | `number`          |          |               |
| pixels  | `...PixelValue[]` |          |               |

_Returns:_ `string`

_Examples:_

```ts
jssRemWithSize(16, 16); // => '1rem'
jssRemWithSize(16, 16, 'auto'); // => '1rem auto'
jssRemWithSize(16, -8, 0); // => '-0.5rem 0'
jssRemWithSize(16, 24, 32, 48); // => '1.5rem 2rem 3rem'
jssRemWithSize(20, 30, 10, 45); // => '1.5rem 0.5rem 2.25rem'
```

[comment]: <> (AUTODOC-TOOL-END)

---

#### `jssSetPreDefinedRemSize()`

[comment]: <> (AUTODOC-TOOL-START::em-rem#jssSetPreDefinedRemSize)

Change pre-defined rem size.

_Parameters:_

| Name | Data type | Argument | Default value | Description |
| ---- | --------- | -------- | ------------- | ----------- |
| size | `number`  |          |               |

_Returns:_ `void`

_Examples:_

```ts
jssRemDefined(20); // => '1.25rem'
jssSetPreDefinedRemSize(20);
jssRemDefined(20); // => '1rem'
```

[comment]: <> (AUTODOC-TOOL-END)

---

### `jssPercentage()`

[comment]: <> (AUTODOC-TOOL-START::percentage#jssPercentage)

Calculate percentage value

_Parameters:_

| Name           | Data type | Argument   | Default value | Description |
| -------------- | --------- | ---------- | ------------- | ----------- |
| part           | `number`  |            |               |
| full           | `number`  |            |               |
| returnAsNumber | `boolean` | _optional_ | `false`       |
| fractionDigits | `number`  | _optional_ | `5`           |

_Returns:_ `string │ number`

_Examples:_

```ts
jssPercentage(720, 1280); // => '56.25%'
jssPercentage(9, 16); // => '56.25%'
jssPercentage(9, 16, true); // => 56.25
jssPercentage(9, 16, true, 1); // => 56.2
```

[comment]: <> (AUTODOC-TOOL-END)

---

#### `jssUnitExtract()`

[comment]: <> (AUTODOC-TOOL-START::units#jssUnitExtract)

Get CSS unit `px|rem|em|%|vw|vh|ms|s` from value

_Parameters:_

| Name  | Data type         | Argument | Default value | Description |
| ----- | ----------------- | -------- | ------------- | ----------- |
| value | `string │ number` |          |               |

_Returns:_ `string`

_Examples:_

```ts
jssUnitExtract(100); // ''
jssUnitExtract('3rem'); // 'rem'
jssUnitExtract(jssEm(16, [64])); // 'em'
jssUnitExtract('-20px'); // 'px'
jssUnitExtract('56.25%'); // '%'
```

[comment]: <> (AUTODOC-TOOL-END)

---

#### `jssUnitLess()`

[comment]: <> (AUTODOC-TOOL-START::units#jssUnitLess)

Remove CSS unit `px|rem|em|%|vw|vh|ms|s` and receive number value

_Parameters:_

| Name  | Data type         | Argument | Default value | Description |
| ----- | ----------------- | -------- | ------------- | ----------- |
| value | `string │ number` |          |               |

_Returns:_ `number`

_Examples:_

```ts
jssUnitLess('3rem'); // 4
jssUnitLess(jssEm(16, [64])); // 4
jssUnitLess('-20px'); // -20
jssUnitLess('56.25%'); // 56.25
```

[comment]: <> (AUTODOC-TOOL-END)

---

#### `jssUnitRevertSign()`

[comment]: <> (AUTODOC-TOOL-START::units#jssUnitRevertSign)

Invert value sign

_Parameters:_

| Name  | Data type         | Argument | Default value | Description |
| ----- | ----------------- | -------- | ------------- | ----------- |
| value | `string │ number` |          |               |

_Returns:_ `string │ number`

_Examples:_

```ts
jssUnitRevertSign(-20); // 20
jssUnitRevertSign('3rem'); // '-3rem'
jssUnitRevertSign('56.25%'); // '-56.25%'
jssUnitRevertSign('-4px 4px'); // '4px -4px'
jssUnitRevertSign(jssEm(16, 64, -64)); // '-4em 4em'
jssUnitRevertSign('-4px, 4px'); // '4px, -4px'
jssUnitRevertSign('-4px, 4px 4px, -5px, -6 -7 -8, 99.9%'); // '4px, -4px -4px, 5px, 6 7 8, -99.9%'
```

[comment]: <> (AUTODOC-TOOL-END)

---

### Borders

#### `jssBorder()`

[comment]: <> (AUTODOC-TOOL-START::border#jssBorder)

Setting border values a little more declarative

_Parameters:_

| Name  | Data type                                                                            | Argument   | Default value | Description |
| ----- | ------------------------------------------------------------------------------------ | ---------- | ------------- | ----------- |
| width | `string │ number`                                                                    |            |               |
| style | `none │ hidden │ dotted │ dashed │ solid │ double │ groove │ ridge │ inset │ outset` | _optional_ | `'solid'`     |
| color | `string`                                                                             | _optional_ |               |

_Returns:_ `string`

_Examples:_

```ts
jssBorder(2); // => '2px solid'
jssBorder('0.25rem'); // => '0.25rem solid'
jssBorder(3, 'double'); // => '3px double'
// instead of concat `1px solid ${myColorVar}`
jssBorder(1, 'solid', myColorVar); // => '1px solid #f00'
```

[comment]: <> (AUTODOC-TOOL-END)

---

---

### Fonts

#### `jssFontFaceSrc()`

[comment]: <> (AUTODOC-TOOL-START::font-face-src#jssFontFaceSrc)

Returns string font-face src value

_Parameters:_

| Name  | Data type | Argument | Default value | Description |
| ----- | --------- | -------- | ------------- | ----------- |
| woff2 | `string`  |          |               |
| woff  | `string`  |          |               |

_Returns:_ `string`

_Examples:_

```ts
const src = jssFontFaceSrc('fonts/my.woff2', 'fonts/my.woff');
// => "url('/fonts/my.woff2') format('woff2'), url('/fonts/my.woff') format('woff')"
```

[comment]: <> (AUTODOC-TOOL-END)

---

### Custom Properties

#### `jssVar()`

[comment]: <> (AUTODOC-TOOL-START::var#jssVar)

Set CSS function `var` body

_Parameters:_

| Name     | Data type         | Argument   | Default value | Description |
| -------- | ----------------- | ---------- | ------------- | ----------- |
| varName  | `string`          |            |               |
| fallback | `string │ number` | _optional_ |               |

_Returns:_ `string`

_Examples:_

```ts
jssVar('--top'); // 'var(--top)'
jssVar('top'); // 'var(--top)'
jssVar('--color', 'red'); // 'var(--color, red)'

const myVarsDict = {
	propA: 'myPropA',
	propB: 'myPropB'
};

jssVar(myVarsDict.propA, 10); // 'var(--myPropA, 10)'
```

[comment]: <> (AUTODOC-TOOL-END)

---

[▲ Go Top](#) | [▲ Table of Content](#table-of-content)

---

## Contributing

Please fill free to create [issues](https://github.com/WezomCompany/toolkits/issues) or
send [PR](https://github.com/WezomCompany/toolkits/pulls)

## Licence

[BSD-3-Clause License](https://github.com/WezomCompany/toolkits/blob/master/LICENSE)

---