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<div>
<input type=password value=secret>
</div>
<div>
<input type=password value=secret>
</div>
<div>
<input type=password value=secret>
</div>
div {
margin: 1em;
}
.pw-shown::after {
content: "❌";
}
.pw-hidden::after {
content: "👀";
}
.sr-only {
position: absolute;
width: 1px;
height: 1px;
padding: 0;
margin: -1px;
overflow: hidden;
clip: rect(0, 0, 0, 0);
white-space: nowrap;
border-width: 0;
}
// Je n'aime pas les fonctions anonymes pour les event handler car on est obligé
// de tout lire pour comprendre ce qui est fait.
// En donnant un nom à ces fonctions, on aide le lecteur à comprendre ce qui se
// passe et lui laisser le choix de ne pas plonger dans l'implémentation
// Lorsque je nomme mes variables, j'utilise ce que représente la variable
// (buttonTemplate) plutôt que le type de la variable (xml)
// J'ai changé le nom des classes CSS. Comme elles représentent un état,
// j'utilise des noms ou des adjectifs (shown, hidden) mais surtout pas un verbe
// qui doit être réservé aux actions, c'est à dire les functions.
// Ceci est une Immediately Invoked Function Expression (IIFE), utile pour ne
// pas polluer window avec nos fonctions et variables.
(function () {
// Je ne sais pas d'où vient msg dans le code original donc j'ai ajouté
// cet objet
const msg = {
show_password: "Show password",
hide_password: "Hide password"
};
function togglePasswordShown(e) {
e.preventDefault();
const button = e.currentTarget;
const isPasswordShown = button.classList.contains("pw-shown");
const inputType = isPasswordShown ? "password" : "text";
const buttonContent = isPasswordShown
? msg.show_password
: msg.hide_password;
// classList.toggle('pw-show') regarde si 'pw-show' est dans classList
// et l'inverse. Ça permet de ne pas dupliquer les lignes .add et
// .remove. Pour être encore plus robuste, j'y ajoute le 2e paramètre.
// Si quelqu'un joue avec les classList dans les devtools, on est sur de
// retomber sur ces pattes
button.classList.toggle("pw-shown", !isPasswordShown);
button.classList.toggle("pw-hidden", isPasswordShown);
// En ayant les variables inputType et buttonContent définies au-dessus,
// on évite de dupliquer des lignes presque identiques. Cela nous permet
// d'être sur que l'on oublie aucun changement nécessaire dans l'une des
// branches. Cela assure aussi que title et sr-only contiennent le même
// texte.
button.previousElementSibling.setAttribute("type", inputType);
button.setAttribute("title", buttonContent);
button.querySelector("span").textContent = buttonContent;
}
function installShowPassword() {
const buttonTemplate = new DOMParser().parseFromString(
`<button type="button" class="pw-hidden" title="${msg.show_password}"><span class="sr-only">${msg.show_password}</span></button>`,
"text/html"
).body.firstChild;
const passwordFields = document.querySelectorAll(
"input[type=password]"
);
// for of est assez nouveau. Je préfère au style forEach parce que ça
// fait des parenthèses en moins à la fin de la boucle. Mais c'est
// équivalent
for (const passwordField of passwordFields) {
// Un bug du code original : Il ne marchait pas super avec plusieurs
// champs password. Lorsque qu'on insère un nœud dans le DOM, il ne
// peut y en avoir qu'un. Il faut donc faire une copie avant de
// l'insérer. Dans le code original, uniquement le dernier champ
// password obtient le bouton magique
const button = buttonTemplate.cloneNode(true);
// https://developer.mozilla.org/fr/docs/Web/API/ChildNode/after
// La compat avec Safari n'est pas à jour donc j'ai ouvert:
// https://github.com/mdn/browser-compat-data/pull/6232
passwordField.after(button);
button.addEventListener("click", togglePasswordShown);
}
}
// $() utilise DOMContentLoaded qui arrive dès que le HTML a fini d'être parsé
// (approximation de la réalité un peu plus complexe)
// load n'arrive que quand toutes les resources de la page sont téléchargées
window.addEventListener("DOMContentLoaded", installShowPassword);
})();
Also see: Tab Triggers