Angular directives, including or excluding HTML-elements, based on currently active Bootstrap grid: xs, sm, md, lg. Allowing for a reduction of watcherts.

1. Bootstrap 3 grid class detection takes places via injecting Bootstrap 3 grid classes and testing them for visibility.
2. Internally, ng-if is used.
3. Thus, as this directive combines the Bootstrap-css-grid and Angular-ng-if, it should be pretty solid.

Installation

npm i ng-if-bootstrap-grid --save

Usage

AngularJS

1angular.module('myApp', [require('ng-if-bootstrap-grid').name]);

HTML

1<h1 ng-if-bootstrap-grid="md,lg">md,lg</h1><!-- md and lg are or'ed -->
2<h1 ng-if-bootstrap-grid="lg">lg</h1>
3<h1 ng-if-bootstrap-grid="md">md</h1>
4<h1 ng-if-bootstrap-grid="sm">sm</h1>
5<h1 ng-if-bootstrap-grid="xs">xs</h1>
6
7<h1 ng-if-not-bootstrap-grid="lg">not-lg</h1>
8<h1 ng-if-not-bootstrap-grid="md">not-md</h1>
9<h1 ng-if-not-bootstrap-grid="sm">not-sm</h1>
10<h1 ng-if-not-bootstrap-grid="xs">not-xs</h1>

Details

Add the ng-if-bootstrap-grid or ng-if-not-bootstrap-grid attribute to any HTML-element that should be excluded or included, based on the currently active bootstrap grid class.

Works like ng-if: the excluded elements (and their children) will not get rendered. Thus limiting the watcher count. The bootstrap classes (col-xs-*) just hide elemens, but they still get rendered.

The attributes take the grid class as a parameter. More than one grid class can be set as parameter value, by separating them with commas or spaces.

TODO

The injection does not take place in the compile function of the directive, as this (misteriously) breaks the code.

Links

Git

NPM

License

MIT