InlineJS

Run JavaScript code by embedding them in your HTML using the element as context.

InlineJS is component-based spin-off to Alpine.js.

Like Alpine.js, it works without creating shadow DOMs.

Install

• Grab source or distribution versions from GitHub
• Include script in your HTML file.

NPM Install

npm install @benbraide/inlinejs

Initialization

import { BootstrapAndAttach } from  '@benbraide/inlinejs/bootstrap/attach';

BootstrapAndAttach();

BootstrapAndAttach takes an optional DOM element to search. Defaults to the document element.

Usage

Dropdown/Modal

<div x-data="{ open: false }">
    <button x-on:click="open = true">Open Dropdown</button>
    <div x-show="open" x-on:click.outside="open = false">
        Dropdown Body
    </div>
</div>

Tabs

<div x-data="{ tab: 'foo' }">
    <button x-class:active="tab === 'foo'" x-on:click="tab = 'foo'">Foo</button>
    <button x-class:active="tab === 'bar'" x-on:click="tab = 'bar'">Bar</button>

    <div x-show="tab === 'foo'">Tab Foo</div>
    <div x-show="tab === 'bar'">Tab Bar</div>
</div>

You can even use it for non-trivial things: Pre-fetching a dropdown's HTML content on hover

<div x-data="{ open: false, html: 'Loading Spinner...' }">
    <button
        x-on:mouseenter.once="html = $fetch('/dropdown-partial.html')"
        x-on:click="open = true"
    >Show Dropdown</button>

    <div x-show="open" x-html="html" x-on:click.outside="open = false"></div>
</div>

Text Interpolation

In InlineJS reactive text can be interpolated using a pair of {{ and }}. Interpolation is valid for attribute values and text contents.

Example

<form x-data="{ btnText: 'Save', txtValue: 'Default value' }">
	<input name="content" value="{{ txtValue }}">
	<button type="submit">{{ btnText }} Draft</button>
</form>

Quick Notes

• When using the compiled scripts in a script tag no initialization is necessary, as InlineJS will automatically initialize and bind to the document.
• If the result of an evaluated expression is a function, most directives will call that function.
• When evaluating an expression, this refers to the element that the directive is being executed on.
• Directives are executed accordingly from left to right as they appear on an element. There is no precedence.

Learn

Available core directives:

| Directive | Description | | --- | --- | | x-data | Declares a new component scope or nested scope with associated data. | | x-component | Assigns a key to a component. | | x-ref | Stores a reference to the DOM element in the component using the specified key. | | x-locals | Creates storage local to the element and its offspring. | | x-post | Runs an expression after all directives on element --- and offspring directives --- have been executed. | | x-uninit | Runs an expression when an element is removed from the DOM. | | x-static | Runs an expression without keeping track of changes. | | x-effect | Evaluates an expression and keeps track of changes. | | x-bind | Sets the value of an attribute to the result of a JS expression. | | x-style | Similar to x-bind, but will update the style attribute. | | x-class | Set/Remove one or more classes based on the truth of the specified expression. | | x-text | Works similarly to x-bind, but will update the innerText of an element. | | x-html | Works similarly to x-bind, but will update the innerHTML of an element. | | x-on | Attaches an event listener to the element. Executes JS expression when emitted. | | x-model | Adds "two-way data binding" to an element. Keeps input element in sync with component data. | | x-if | Remove or inserts an element from/into the DOM depending on expression (true or false). | | x-else | Remove or inserts an element from/into the DOM depending on expression (true or false) and a preceding x-if or x-else directive. | | x-each | Create new DOM nodes for each item in an array, associative map, or integer range. | | x-show | Toggles display: none; on the element depending on expression (true or false). | | x-cloak | This attribute is removed when InlineJS initializes. Useful for hiding pre-initialized DOM. |

Available core magic properties:

| Property | Description | | --- | --- | | $component | Retrieve the specified component storage. | | $locals | Retrieve the local storage associated with the element. | | $proxy | Retrieve the root proxy. | | $native | Retrieve the non-proxied data associated with a key. | | $refs | Retrieve DOM elements marked with x-ref inside the component. | | $scope | Retrieve the current scope. | | $scopes | Retrieve all scopes in the current component. | | $stream | Stream the specified data using a callback. | | $wait | Wait the specified data using a callback. | | $static | Suppress reactivity for the specified access. | | $unoptimized | Suppress optimizations for the specified access. | | $watch | Watch a given expression for changes. | | $pick | Return one of two values based on a predicate. | | $rel | Use one of the relational operators. | | $log | Use one of the logical operators. | | $math | Use one of the arithmetic operators. | | $dom | Access a DOM property. | | $class | Use one of the available class helpers. | | $eval | Evaluate an expression and return the result. | | $nextTick | Execute a given expression after InlineJS has made its reactive DOM updates. |

Directives

x-data

Example: <div x-data="{ foo: 'bar' }">...</div>

Structure: <div x-data="[object literal]|[Function]">...</div>

x-data declares a new component scope. It tells the framework to initialize a new component with the following data object.

Extract Component Logic

You can extract data (and behavior) into reusable functions:

<div x-data="dropdown">
    <button x-on:click="open">Open</button>

    <div x-show="isOpen()" x-on:click.outside="close">
        Dropdown
    </div>
</div>

<script>
    function dropdown() {
        return {
            show: false,
            open() { this.show = true },
            close() { this.show = false },
            isOpen() { return this.show },
        }
    }
</script>

You can also mix-in multiple data objects using object destructuring:

<div x-data="{...dropdown(), ...tabs()}">

Component config

You can specify a $config property on the object used to initialize a component. This enables you to specify per-component configurations.

<div x-data="{ $config: { name: 'my-component', reactiveState: 'optimized' } }"></div>

Available configurations are:

• reativeState specifies the reactivity state of a component. One of default, optimized, or unoptimized.
• name specifies the name of the component.
• locals specifies data that should be treated as local to the root element and its offspring.
• init specifies a function to execute after the component has been initialized.
• uninit specifies a function to execute when the root element is removed from the DOM.
• post specifies a function to execute after all directives have been processed, including offspring's directives.

Nested scope

You can create nested scopes by using the x-data directive on an offspring of a component:

<div x-data="{ level: 'top' }">
    <div x-data="{ level: 'nested' }">
	    <p x-text="$scope.level"></p>
	    <p x-text="$parent.level"></p>
    </div>
</div>

x-data exposes the following local properties, available to the component root and its offspring:

• $name retrieves the name of the current scope. If not accessed from a nested scope, then it returns the name of the current component.
• $componentName retrieves the name of the current component.
• $parent retrieves the data associated with the parent of the current scope. Returns undefined if not accessed from a nested scope.

x-component

Example: <div x-data x-component="my-component"></div>

Structure: <div x-data="..." x-component="[identifier]"></div>

x-component assigns a name to a component.

evaluate argument

Example: <div x-data x-component:evaluate="componentName"></div>

Use the evaluate argument to instruct the directive to evaluate the specified expression.

x-ref

Example: <div x-data x-ref="myDiv"></div>

Structure: <div x-data="..." x-ref="[variable]"></div>

x-ref stores a reference to the DOM element in the component using the specified key. The key is added to the $refs global magic property.

x-locals

Example: <div x-data x-locals="{ foo: 'bar' }">...</div>

Structure: <div x-locals="[object literal]|[Function]">...</div>

x-data declares a new component scope. It tells the framework to initialize a new component with the following data object.

x-post

Example: <div x-data x-post="console.log('Every offspring initialized')"></div>

Structure: <div x-data="..." x-post="[expression]"></div>

x-post runs an expression after all directives on element, and offspring directives, have been executed.

x-uninit

Example: <div x-data="{ foo: 'bar' }" x-uninit="console.log('Element removed')"></div>

Structure: <div x-data="..." x-uninit="[expression]"></div>

x-uninit runs an expression when an element is removed from the DOM.

x-static

Example: <div x-data="{ foo: 'bar' }" x-static="foo = 'baz'"></div>

Structure: <div x-data="..." x-static="[expression]"></div>

x-static runs an expression without keeping track of changes.

x-effect

Example: <div x-data="{ value: 9 }" x-effect="doubled = value * 2"></div>

Structure: <div x-data="..." x-effect="[expression]"></div>

x-effect runs an expression and keeps track of changes. When changes occur elsewhere, the expression is re-run.

x-bind

Note: You are free to use the shorter ":" syntax: :type="..."

Example: <input x-bind="inputType">

Structure: <input x-bind:[attribute]="[expression]">

x-bind sets the value of an attribute to the result of a JavaScript expression. The expression has access to all the keys of the component's data object, and will update every-time its data is updated.

Note: attribute bindings ONLY update when their dependencies update. The framework is smart enough to observe data changes and detect which bindings care about them.

x-bind for boolean attributes

x-bind supports boolean attributes in the same way as value attributes, using a variable as the condition or any JavaScript expression that resolves to true or false.

For example:

<!-- Given: -->
<button x-bind:disabled="myVar">Click me</button>

<!-- When myVar == true: -->
<button disabled="disabled">Click me</button>

<!-- When myVar == false: -->
<button>Click me</button>

This will add or remove the disabled attribute when myVar is true or false respectively.

Boolean attributes are supported as per the HTML specification, for example disabled, readonly, required, checked, hidden, selected, open, etc.

Note: If you need a false state to show for your attribute, such as aria-*, chain .toString() to the value while binding to the attribute. For example: :aria-expanded="isOpen.toString()" would persist whether isOpen was true or false.

x-style

Example:

<span x-style:display="'block'"></span>
<span x-style="{ display: 'block', width: '1rem' }"></span>

Structure:

<span x-style:[property]="[expression]"></span>
<span x-style="{ [property]: [expression], ... }"></span>

x-style sets the value of a style property on an element to the evaluated expression.

x-class

Note: You are free to use the shorter "." syntax: .block="..."

Example:

<span x-class:block="shouldBeBlock"></span>
<span x-class="{ block: true, inline: false }"></span>

Structure:

<span x-class:[name]="[boolean expression]"></span>
<span x-class="{ [name]: [boolean expression], ... }"></span>

x-class sets or removes a class name on an element based on the truthiness of the evaluated expression.

x-text

Example: <span x-text="foo"></span>

Structure: <span x-text="[expression]"

x-text works similarly to x-bind, except instead of updating the value of an attribute, it will update the innerText of an element.

A promise, or promise-like object, may be returned and x-text will wait for it to be resolved and the resulting value used.

x-html

Example: <span x-html="foo"></span>

Structure: <span x-html="[expression]"

x-html works similarly to x-bind, except instead of updating the value of an attribute, it will update the innerHTML of an element.

A promise, or promise-like object, may be returned and x-html will wait for it to be resolved and the resulting value used.

:warning: Only use on trusted content and never on user-provided content. :warning:

Dynamically rendering HTML from third parties can easily lead to XSS vulnerabilities.

x-on

Note: You are free to use the shorter "@" syntax: @click="..."

Example: <button x-on:click="foo = 'bar'"></button>

Structure: <button x-on:[event]="[expression]"></button>

x-on attaches an event listener to the element it's declared on. When that event is emitted, the JavaScript expression set as its value is executed.

If any data is modified in the expression, other element attributes "bound" to this data, will be updated.

Note: You can also specify a JavaScript function name

• This directive exposes a $event context variable, representing the generated native event, accessible during the evaluation of the specified expression.
• When a function is specified, it is passed the generated event as the first argument.

Example: <button x-on:click="myFunction"></button>

This is equivalent to: <button x-on:click="myFunction($event)"></button>

keydown modifiers

Example: <input type="text" x-on:keydown.esc="open = false">

You can specify specific keys to listen for using keydown modifiers appended to the x-on:keydown directive. Note that the modifiers are kebab-cased versions of Event.key values.

Examples: enter, escape, arrow-up, arrow-down

Note: You can also listen for system-modifier key combinations like: x-on:keydown.ctrl.enter="foo" Multiple keys can be combined for alternatives e.g. x-on:keydown.enter.space Character ranges can be specified e.g. x-on:keydown.a-z x-on:keydown.0-9 Character groups can be specified e.g. x-on:keydown.alpha x-on:keydown.digits

.outside modifier

Example: <div x-on:click.outside="showModal = false"></div>

When the .outside modifier is present, the event handler will only be executed when the event originates from a source other than itself, or its offspring.

This is useful for hiding dropdowns and modals when a user clicks away from them.

.prevent modifier Example: <input type="checkbox" x-on:click.prevent>

Adding .prevent to an event listener will call preventDefault on the triggered event. In the above example, this means the checkbox wouldn't actually get checked when a user clicks on it.

.stop modifier Example: <div x-on:click="foo = 'bar'"><button x-on:click.stop></button></div>

Adding .stop to an event listener will call stopPropagation on the triggered event. In the above example, this means the "click" event won't bubble from the button to the outer <div>. Or in other words, when a user clicks the button, foo won't be set to 'bar'.

.self modifier Example: <div x-on:click.self="foo = 'bar'"><button></button></div>

Adding .self to an event listener will only trigger the handler if the $event.target is the element itself. In the above example, this means the "click" event that bubbles from the button to the outer <div> will not run the handler.

.window modifier Example: <div x-on:resize.window="isOpen = window.outerWidth > 768 ? false : open"></div>

Adding .window to an event listener will install the listener on the global window object instead of the DOM node on which it is declared. This is useful for when you want to modify component state when something changes with the window, like the resize event. In this example, when the window grows larger than 768 pixels wide, we will close the modal/dropdown, otherwise maintain the same state.

Note: You can also use the .document modifier to attach listeners to document instead of window

.once modifier Example: <button x-on:mouseenter.once="fetchSomething()"></button>

Adding the .once modifier to an event listener will ensure that the listener will only be handled once. This is useful for things you only want to do once, like fetching HTML partials and such.

.passive modifier Example: <button x-on:mousedown.passive="interactive = true"></button>

Adding the .passive modifier to an event listener will make the listener a passive one, which means preventDefault() will not work on any events being processed, this can help, for example with scroll performance on touch devices.

.debounce modifier Example: <input x-on:input.debounce="fetchSomething()">

The .debounce modifier allows you to "debounce" an event handler. In other words, the event handler will NOT run until a certain amount of time has elapsed since the last event that fired. When the handler is ready to be called, the last handler call will execute.

The default debounce "wait" time is 250 milliseconds.

If you wish to customize this, you can specify a custom wait time like so:

<input x-on:input.debounce.750="fetchSomething()">
<input x-on:input.debounce.750ms="fetchSomething()">

x-model

Example: <input type="text" x-model="foo">

Structure: <input type="text" x-model="[data item]">

x-model adds "two-way data binding" to an element. In other words, the value of the input element will be kept in sync with the value of the data item of the component.

Note: x-model is smart enough to detect changes on text inputs, checkboxes, radio buttons, textareas, selects, and multiple selects.

.number modifier Example: <input x-model.number="age">

The number modifier will convert the input's value to a number. If the value cannot be parsed as a valid number, the original value is returned.

.debounce modifier Example: <input x-model.debounce="search">

The debounce modifier allows you to add a "debounce" to a value update. In other words, the event handler will NOT run until a certain amount of time has elapsed since the last event that fired. When the handler is ready to be called, the last handler call will execute.

The default debounce "wait" time is 250 milliseconds.

If you wish to customize this, you can specify a custom wait time like so:

<input x-model.debounce.750="search">
<input x-model.debounce.750ms="search">

x-if

Example: <template x-if="true"><div>...</div></template>

Structure: <template x-if="[expression]">...</template>

For cases where x-show isn't sufficient (x-show sets an element to display: none if it's false), x-if can be used to actually remove an element completely from the DOM.

Note:

• A template element is required for this directive.
• The template element must have a single direct child.

x-else

Example:

<template x-if="count == 0"><div>...</div></template>
<template x-else="count == 1"><div>...</div></template>
<template x-else><div>...</div></template>

Structure: <template x-else="[optional expression]">...</template>

The x-else directive enables an if-then-else paradigm. A x-if or x-else directive is required to precede it.

Note:

• A template element is required for this directive.
• The template element must have a single direct child.

x-each

Example:

<template x-each="items"><div>...<div></template>
<template x-each="items as item"><div>...<div></template>
<template x-each="items as key => item"><div>...<div></template>

Structure:

<template x-each="[expression]">...</template>
<template x-each="[expression] as [identifier]">...</template>
<template x-each="[expression] as [key] => [identifier]">...</template>

x-each is available for cases when you want to create new DOM nodes for each item in an array.

Note:

• A template element is required for this directive.
• The template element must have a single direct child.

It exposes a $each local property with the following fields:

• count: Retrieves the total count of the loop
• index: Retrieves the current index
• value: Retrieves the current value
• collection: Retrieves the collection that is being iterated
• parent: Retrieves the parent loop property, if any

It can iterate over arrays, key-value associative objects, and integer ranges.

A name can be specified for $each.value using the following syntax:

<template x-each="items as item">
	<p>{{ item }}</p>
</template>

A name can be specified for $each.index using the following syntax:

<template x-each="items as index => item">
	<p>{{ index }}{{ item }}</p>
</template>

Nesting x-eachs

You can nest x-each loops. For example:

<template x-each="items as item">
    <template x-each="item.subItems as subItem">
	    <div x-text="subItem"></div>
    </template>
</template>

Iterating over an integer range

Iteration over integers are supported. Example:

<template x-each="10 as i"><div>...</div></template>

By default, the iteration range is from 0 to value - 1.

Negative values can be specified. Example:

<template x-each="-10 as i"><div>...</div></template>

By default, the iteration range is from to value + 1 to 0.

x-show

Example: <div x-show="open"></div>

Structure: <div x-show="[expression]"></div>

x-show toggles the display: none; style on the element depending if the expression resolves to true or false.

x-cloak

Example: <div x-data="{}" x-cloak></div>

x-cloak attributes are removed from elements when InlineJS initializes. This is useful for hiding pre-initialized DOM. It's typical to add the following global style for this to work:

<style>
    [x-cloak] { display: none; }
</style>