ng2-fittext

An Angular2 directive written in pure typescript (and without jquery!), for autoscale the font size of an element to fit 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 with the parent element (this works if you have a variable number of element between element and 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	is the selector of the directive	true/false
container	the container to fit (if not present it fit default to parent container)	ElementRef
activateOnResize	enable/disable the autofit in case of window resize	true or false (default false)
activateOnInputEvents	enbale/disable the autofit in case of input box events (keydown, keyup etc..)	true or false (default false)
maxFontSize	maximal font size	number, default is 1000
!deprecated! useMaxFontSize	use max font size if is true	deprecated!
minFontSize	minimal 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 spended too much time for solve this problem and because i didn't find nothing on the web (13/03/2017) that do this without jquery and easily integrable in angular2. For sure is not a good implementation, maybe is not the best way to do it, but, it do the job.

Todos

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

License

MIT

Lorenzo I.