ng2-fittext

An Angular2 directive written in pure typescript (and without jquery!), to autoscale the font size of an element so that it fits an upper level container.

Demo

http://plnkr.co/edit/v0TQaYepV4E2Heur02j5?p=preview

Installation

Install the library

$ npm install --save ng2-fittext

Usage

1. Declare it in your module

   import {Ng2FittextModule} from "ng2-fittext";
   @NgModule({
     imports: [
       Ng2FittextModule
     ]
   })
   

2. Use it in your components

   import {Component} from '@angular/core';
   @Component({
     selector: 'label',
     template: `<div #container>
                   <div [fittext]="true" [activateOnResize]="true" [container]="container">Bla bla bla...</div>
               </div>`
   })
   export class LabelComponent {}
   

Examples

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

import {Component} from '@angular/core';
@Component({
  selector: 'label',
  template: `<div>
                <div [fittext]="true" [activateOnResize]="true">Bla bla bla...</div>
            </div>`
})
export class LabelComponent {}

NEW! Support for autoresize input box!

import {Component} from '@angular/core';
@Component({
  selector: 'inputbox',
  template: `<div #container>
                <input [fittext]="true" [activateOnResize]="true" [container]="container" [activateOnInputEvents]="true">`,
            </div>`
})

export class InputBoxComponent {}

NEW! Support for maxFontSize!

import {Component} from '@angular/core';
@Component({
  selector: 'inputbox',
  template: `<div>
                <input [fittext]="true" [activateOnResize]="true" [activateOnInputEvents]="true" [minFontSize]="40" [maxFontSize]="100">`,
            </div>`
})
export class InputBoxComponent {}

Input Parameters:

Parameter	Description	Values
fittext	the 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 in case of window resize	true or false (default false)
activateOnInputEvents	enable/disable the autofit 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 to solve this problem and didn't find anything on the web (13/03/2017) that does this without jquery and that is also easily integrable in angular2. For sure it is not the best implementation, maybe is not the best way to do it, but, it gets the job done.

Todos

• Write tests
• Find a better algorithm to find the font-size who fits better the container

License

MIT

Lorenzo I.