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https://github.com/thisloke/ng2-fittext

An Angular2+ directive that autoscale the font size of an element until it fit the upper level container dimension.
https://github.com/thisloke/ng2-fittext

angular angular2-directive font-automatic-resizing font-size ng2-fittext responsive text-automatic-resizing text-resize

Last synced: 11 months ago
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An Angular2+ directive that autoscale the font size of an element until it fit the upper level container dimension.

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ng2-fittext

An Angular 2+ directive, written in pure TypeScript (without jQuery!), to automatically scale the font size of an element so that it fits within its parent container.

[![Download via NPM](https://img.shields.io/npm/v/ng2-fittext.svg)](https://www.npmjs.com/package/ng2-fittext)
![Angular](https://img.shields.io/badge/Angular-18-green.svg)
![Build Status](https://github.com/thisloke/ng2-fittext/actions/workflows/tests.yml/badge.svg)
![Contributions welcome](https://img.shields.io/badge/contributions-welcome-green.svg)
[![License](https://img.shields.io/badge/license-MIT-blue.svg)](https://opensource.org/licenses/MIT)

## Demo
Check out the live demo: [ng2-fittext Demo](https://stackblitz.com/edit/stackblitz-starters-7ghzat?file=src%2Fmain.ts)


ng2 fittext example

## Installation

Install the library using npm according to your angular version (see table below):

| Angular | ng2-fittext | command |
|---------|-------------|-------------------------------|
| <= v17 | 1.4.3 | ```npm i ng2-fittext@1.4.3``` |
| >= v18 | 2.0.0 | ```npm i ng2-fittext@2.0.0``` |

### Usage

1. Import the module in your Angular application:
```ts
import { Ng2FittextModule } from "ng2-fittext";

@NgModule({
imports: [Ng2FittextModule]
})
```

2. Use the directive in your components:
```ts
import { Component } from '@angular/core';

@Component({
selector: 'label',
template: `


Bla bla bla...


`
})
export class LabelComponent {}
```

### Examples

Fit to the parent element (works if you have a variable number of elements between your element and its parent):

```ts
import { Component } from '@angular/core';

@Component({
selector: 'label',
template: `


Bla bla bla...


`
})
export class LabelComponent {}
```

**NEW! Support for auto-resize input box:**

```ts
import { Component } from '@angular/core';

@Component({
selector: 'inputbox',
template: `




`
})
export class InputBoxComponent {}
```

**NEW! Support for maxFontSize:**

```ts
import { Component } from '@angular/core';

@Component({
selector: 'inputbox',
template: `




`
})
export class InputBoxComponent {}
```

Input Parameters:

| Parameter | Description | Values |
| ------------------------------- | --------------------------------------------------------------------------------------- | ----------------------------- |
| fittext | Directive selector | true/false |
| container | The container to fit (if not present it fits to the parent container by default) | ElementRef |
| activateOnResize | Enable/disable the autofit on window resize | true or false (default false) |
| activateOnInputEvents | Enable/disable the auto-fit in case of input box events (keydown, keyup etc..) | true or false (default false) |
| maxFontSize | Maximum font size | Number (default is 1000) |
| **!deprecated!** useMaxFontSize | Use max font size if is true | Deprecated! |
| minFontSize | Minimum font size | Number (default is 7) |
| modelToWatch | Pass model to watch; when this model changes, font size is automatically recalculated | Any type of model |

Output Parameters:

| Parameter | Description | Values |
| --------------- | ----------------- | ------ |
| fontSizeChanged | Current font size | string |

### Development

Want to contribute? Great!
Simply, clone the repository!

I created this library because I always spent too much time solving this problem and didn't find anything on the web (as of 13/03/2017) that does this without jQuery and is easily integrable in Angular 2+.
While it might not be the best implementation, it gets the job done.

### Todos

- Write tests
- Find a performant algorithm to find the font size that fits the container better

## License

MIT

**Lorenzo I.**