Ibyar Directives

Ibyar directive had the built-in directives for aurora project.

Install

npm i --save @ibyar/directives

yarn add @ibyar/directives

Supported Directive

Structure Directives

• [x] *if
• [x] *for is same as ( *forOf )
• [x] *forIn
• [x] *forAwait
• [x] *switch and (*case, *default)

Attributes Directives

• [x] *class
• [x] *style

How to use Structure Directives:

Control Flow Syntax

@if(x > 50) {
	x: is {{x}}
} else {
	x: is less than 50
}

@if(x > 50) {
	x: is {{x}}
} else if( x > 30 ){
	x: is more than 30
}

@for(let item of [1,2,3,4,5,6,7,8]) {
	<div>item is: {{item}}</div>
}

@for(let item of []) {
	<div>item is: {{item}}</div>
} @empty {
	array is empty
}

<div *if="x > 50"> x: is {{x}} </div>

<div *if="x > 50; else otherTemplate"> x: is {{x}} </div>
<template #otherTemplate> X is more than 50</template>

<div *if="x > 50; then thenTemplate; else elseTemplate"> will be ignored </div>
<template #thenTemplate> x: is {{x}}</template>
<template #elseTemplate> X is less than 50</template>


<div class="col-3" *forOf="let user of people">
	<p>Name: <span>{{user.name}}</span></p>
	<p>Age: <span>{{user.age}}</span></p>
</div>
<div class="col-3" *for="let user of people">
	<p>Name: <span>{{user.name}}</span></p>
	<p>Age: <span>{{user.age}}</span></p>
</div>

<div class="col-3" *forOf let-user  [of]="people">
	<p>Name: <span>{{user.name}}</span></p>
	<p>Age: <span>{{user.age}}</span></p>
</div>

<div class="col-3" *forIn="let key in person1">
	<p>Key: <span>{{key}}</span></p>
	<p>Value: <span>{{person1[key]}}</span></p>
</div>

<div class="col-3" *forIn let-key [in]="person1">
	<p>Key: <span>{{key}}</span></p>
	<p>Value: <span>{{person1[key]}}</span></p>
</div>

<div class="col-3" *forAwait="let num of asyncIterable">
	<p>num = <span>{{num}}</span></p>
</div>

<div class="col-3" *forAwait let-num [of]="asyncIterable">
	<p>num = <span>{{num}}</span></p>
</div>

<div class="col-3" *switch="1">
	<div *case="1">One</div>
	<div *case="2">Two</div>
	<div *case="3">Three</div>
	<div *default>default: Zero</div>
</div>

How to use Attributes Directives:

<div class="row">
	<div [class]="$propertyFromModel"></div>
	<div class="col-{{width}}"></div>
	<div [class]="'col-6'"></div>
	<div [class]="['col-4', $textColor_fromModel, 'text-center']"></div>
</div>
...
<tr [class]="{'table-info': isEven, 'table-danger': isOdd}">
	...
</tr>


<div [style]="'color: var(' + currentColor + ');'">...</div>
<div [style]="`color: var(${currentColor});`">...</div>
<div [style]="{color: 'var(' + currentColor + ')'}">...</div>
<div [style.color]="'var(' + currentColor + ')'"><div>

-- Directives now support input binding (one way/two way/ output=event)

Structural directive syntax reference

When you write your own structural directives, use the following syntax:

*:prefix="( :let | :expression ) (';' | ',')? ( :let | :as | :keyExp )*"

The following tables describe each portion of the structural directive grammar:

How Aurora translates shorthand

Lke Angular translates structural directive shorthand into the normal binding syntax as follows:

Shorthand examples

The following table provides shorthand examples: