A lightweight vanilla JavaScript approach to flash messages.

Usage no npm install needed!

<script type="module">
  import vanillaFlash from '';



A lightweight vanilla JavaScript approach to flash messages.

What is vanillaFlash ?

vanillaFlash is a library that allows to ease the use of flash messages. It is also a vanilla JavaScript adaptation of my jQuery plugin jq-flash.

It allows you to flash messages in a very customizable manner.

What is the required structure ?

First you need to include the CSS and JS (included in dist) files to your page.

This library works bests with a complete CSS reset, one stylesheet is provided for this purpose.

require/import shouldprovide the flash function, including it as a script tag will expose the flash global variable.

Then you can either use a static or dynamic flash message :

A dynamic approach

Sometimes you need to flash a message "on the go", therefore you can use :

flash("success", "This is a message");
flash("pingas", "OwO");

flash.failure("oh :c");"btw");

A static approach

Sometimes you need to flash a message via your back-end, therefore this is the default structure you need to use (at the very top of your <body> tag):

<div class="flash flash-folded">
    <button class="flash-close">&#x2716;</button><!-- a nice X-->
    <p>This is a message</p>

The flash message type is indicated by adding a class to the wrappingdiv :

<div class="flash flash-folded flash-success">
    <button class="flash-close">&#x2716;</button><!-- a nice X-->
    <p>This is a message</p>

How to embed ?

Since v2.0.0 you can use the special class flash-embed to specify that the flash message isn't in the global scope (i.e. it is within another element than <body>).

Since v2.0.1 you can now flash has the following signature : flash(type, message, context). You can provide the context argument (which expects an HTMLElement) to specify where to embed it. This works also with shorthands (e.g."PINGAS", document.getElementById("flash_holder"))).

The following is the basic HTML structure for an embed :

<div class="someContainer">
    <div class="flash flash-folded flash-embed">
        <button class="flash-close">&#x2716;</button>
        <p>Dem Messages</p>
    <div class="someOtherContent">

How to customize vanillaFlash ?

vanillaFlash uses a class system to design types (flash("type", "") will use flash-type as a CSS class for the div).

Since v2.0.0, vanillaFlash uses Sass, more specifically the SCSS syntax. You can find the source stylesheets under src.

You can create a new type by doing the following:

@import "~vanilla_flash/src/flash";//webpack
    @include flashTheme(
        orange, //bg color
        white, //text color
        0 0 2px rgba(#000, 0.1), //box shadow,
        none //text shadow

You can also modify variables before importing sthe entire flash stylesheet because it uses !default flags everywhere :

$flashGreen: blue;
@import "~vanilla_flash/src/flash";//webpack

You can also add "components" inside of the div, in that case you might need to do more modifications:

    height: 100%;
    width: 8vh;

.flash-icon > div.icon{
    height: /*whatever between 0 and 100%*/;
    width: /*whatever between 0 and 8vh*/;

.flash-icon > p{
    width: calc(100vw - 8vh - 8vh);
    /*total - img's div - button*/

Associated with

<div class="flash flash-folded flash-icon">
    <button class="flash-close">&#x2716;</button>
    <div class="icon">
        <img src="path/to/icon/file.extension" alt="your icon"/>
    <p>Dem Messages</p>