Alerts ^commun

Pour résumer, il s'agit de blocs de messages contextuels pour interagir avec l'utilisateur.
Les alertes sont déclinées dans tous les thèmes de Bootstrap, ce qui donne du sens et des indications visuelles précieuses pour accompagner l'utilisateur.

Format de base : .alert et .alert-{contexte}.

<div class="alert alert-primary" role="alert">
    A simple primary alert—check it out!
</div>
<div class="alert alert-secondary" role="alert">
    A simple secondary alert—check it out!
</div>
<div class="alert alert-success" role="alert">
    A simple success alert—check it out!
</div>
<div class="alert alert-danger" role="alert">
    A simple danger alert—check it out!
</div>
<div class="alert alert-warning" role="alert">
    A simple warning alert—check it out!
</div>
<div class="alert alert-info" role="alert">
    A simple info alert—check it out!
</div>
<div class="alert alert-light" role="alert">
    A simple light alert—check it out!
</div>
<div class="alert alert-dark" role="alert">
    A simple dark alert—check it out!
</div>

Le lien placé à l'intérieur du bloc doit avoir la classe .alert-link.

<div class="alert alert-primary" role="alert">
    A simple primary alert with <a href="#" class="alert-link">an example link</a>. Give it a click if you like.
</div>
<div class="alert alert-secondary" role="alert">
    A simple secondary alert with <a href="#" class="alert-link">an example link</a>. Give it a click if you like.
</div>
<div class="alert alert-success" role="alert">
    A simple success alert with <a href="#" class="alert-link">an example link</a>. Give it a click if you like.
</div>
<div class="alert alert-danger" role="alert">
    A simple danger alert with <a href="#" class="alert-link">an example link</a>. Give it a click if you like.
</div>
<div class="alert alert-warning" role="alert">
    A simple warning alert with <a href="#" class="alert-link">an example link</a>. Give it a click if you like.
</div>
<div class="alert alert-info" role="alert">
    A simple info alert with <a href="#" class="alert-link">an example link</a>. Give it a click if you like.
</div>
<div class="alert alert-light" role="alert">
    A simple light alert with <a href="#" class="alert-link">an example link</a>. Give it a click if you like.
</div>
<div class="alert alert-dark" role="alert">
    A simple dark alert with <a href="#" class="alert-link">an example link</a>. Give it a click if you like.
</div>

Les alertes peuvent également contenir des éléments HTML supplémentaires tels que des titres, des paragraphes et des séparateurs.

<div class="alert alert-success" role="alert">
    <h4 class="alert-heading">Well done!</h4>
    <p>Aww yeah, you successfully read this important alert message. This example text is going to run a bit longer so that you can see how spacing within an alert works with this kind of content.</p>
    <hr>
    <p class="mb-0">Whenever you need to, be sure to use margin utilities to keep things nice and tidy.</p>
</div>

<svg xmlns="http://www.w3.org/2000/svg" class="d-none">
    <symbol id="check-circle-fill" viewBox="0 0 16 16">
        <path d="M16 8A8 8 0 1 1 0 8a8 8 0 0 1 16 0zm-3.97-3.03a.75.75 0 0 0-1.08.022L7.477 9.417 5.384 7.323a.75.75 0 0 0-1.06 1.06L6.97 11.03a.75.75 0 0 0 1.079-.02l3.992-4.99a.75.75 0 0 0-.01-1.05z"/>
    </symbol>
    <symbol id="info-fill" viewBox="0 0 16 16">
        <path d="M8 16A8 8 0 1 0 8 0a8 8 0 0 0 0 16zm.93-9.412-1 4.705c-.07.34.029.533.304.533.194 0 .487-.07.686-.246l-.088.416c-.287.346-.92.598-1.465.598-.703 0-1.002-.422-.808-1.319l.738-3.468c.064-.293.006-.399-.287-.47l-.451-.081.082-.381 2.29-.287zM8 5.5a1 1 0 1 1 0-2 1 1 0 0 1 0 2z"/>
    </symbol>
    <symbol id="exclamation-triangle-fill" viewBox="0 0 16 16">
        <path d="M8.982 1.566a1.13 1.13 0 0 0-1.96 0L.165 13.233c-.457.778.091 1.767.98 1.767h13.713c.889 0 1.438-.99.98-1.767L8.982 1.566zM8 5c.535 0 .954.462.9.995l-.35 3.507a.552.552 0 0 1-1.1 0L7.1 5.995A.905.905 0 0 1 8 5zm.002 6a1 1 0 1 1 0 2 1 1 0 0 1 0-2z"/>
    </symbol>
</svg>

<div class="alert alert-primary d-flex align-items-center" role="alert">
    <svg class="bi flex-shrink-0 me-2" role="img" aria-label="Info:"><use xlink:href="#info-fill"/></svg>
    <div>An example alert with an icon</div>
</div>
<div class="alert alert-success d-flex align-items-center" role="alert">
    <svg class="bi flex-shrink-0 me-2" role="img" aria-label="Success:"><use xlink:href="#check-circle-fill"/></svg>
    <div>An example success alert with an icon</div>
</div>
<div class="alert alert-warning d-flex align-items-center" role="alert">
    <svg class="bi flex-shrink-0 me-2" role="img" aria-label="Warning:"><use xlink:href="#exclamation-triangle-fill"/></svg>
    <div>An example warning alert with an icon</div>
</div>
<div class="alert alert-danger d-flex align-items-center" role="alert">
    <svg class="bi flex-shrink-0 me-2" role="img" aria-label="Danger:"><use xlink:href="#exclamation-triangle-fill"/></svg>
    <div>An example danger alert with an icon</div>
</div>

<style>
    .bi { width:1em; height:1em; }
</style>

Un bouton de fermeture optionnel est prévu si nécessaire. Ajouter .alert-dismissible sur l'alerte et inclure le bouton de fermeture comme dans l'exemple ci-dessous.
Ajouter l'attribut au bouton de fermeture data-bs-dismiss="alert".
Pour animer les alertes lors de leur suppression, il faut ajouter les classes .fade et .show.

<div class="alert alert-warning alert-dismissible fade show" role="alert">
    <strong>Holy guacamole!</strong> You should check in on some of those fields below.
    <button type="button" class="btn-close" data-bs-dismiss="alert" aria-label="Close"></button>
</div>

--#{$prefix}alert-bg: transparent;
--#{$prefix}alert-padding-x: #{$alert-padding-x};
--#{$prefix}alert-padding-y: #{$alert-padding-y};
--#{$prefix}alert-margin-bottom: #{$alert-margin-bottom};
--#{$prefix}alert-color: inherit;
--#{$prefix}alert-border-color: transparent;
--#{$prefix}alert-border: #{$alert-border-width} solid var(--#{$prefix}alert-border-color);
--#{$prefix}alert-border-radius: #{$alert-border-radius};
--#{$prefix}alert-link-color: inherit;

$alert-padding-y:               $spacer;
$alert-padding-x:               $spacer;
$alert-margin-bottom:           1rem;
$alert-border-radius:           var(--#{$prefix}border-radius);
$alert-link-font-weight:        $font-weight-bold;
$alert-border-width:            var(--#{$prefix}border-width);
$alert-dismissible-padding-r:   $alert-padding-x * 3; // 3x covers width of x plus default padding on either side

En savoir plus (Méthodes, Évènements, etc...).