Prevents iOS Safari zoom on inputs while maintaining accessibility
// ==UserScript==
// @name Enhanced Safari Input Zoom Prevention
// @namespace http://tampermonkey.net/
// @version 0.2
// @description Prevents iOS Safari zoom on inputs while maintaining accessibility
// @author sharmanhall
// @match *://*/*
// @grant none
// @license MIT
// ==/UserScript==
(function() {
'use strict';
// Create and append meta viewport tag if it doesn't exist
function setupViewport() {
let viewport = document.querySelector('meta[name="viewport"]');
if (!viewport) {
viewport = document.createElement('meta');
viewport.name = 'viewport';
document.head.appendChild(viewport);
}
viewport.content = 'width=device-width, initial-scale=1, maximum-scale=1';
}
// Apply styles that prevent zoom while maintaining readability
function applyNoZoomStyles() {
const style = document.createElement('style');
style.innerHTML = `
/* Target all form elements */
input:not([type="button"]):not([type="submit"]):not([type="reset"]),
textarea,
select {
font-size: 16px !important; /* iOS minimum font size to prevent zoom */
max-height: none !important;
-webkit-text-size-adjust: 100%;
transform-origin: top left;
transform: scale(1);
}
/* Ensure proper sizing for smaller screens */
@media screen and (max-width: 768px) {
input:not([type="button"]):not([type="submit"]):not([type="reset"]),
textarea,
select {
font-size: 16px !important;
line-height: normal !important;
padding: 0.5em !important;
}
}
/* Maintain proper height for select elements */
select {
height: auto !important;
padding: 0.5em !important;
}
`;
document.head.appendChild(style);
}
// Handle dynamically added elements
function observeNewElements() {
const observer = new MutationObserver((mutations) => {
mutations.forEach((mutation) => {
mutation.addedNodes.forEach((node) => {
if (node.nodeType === 1 && // Element node
(node.tagName === 'INPUT' ||
node.tagName === 'TEXTAREA' ||
node.tagName === 'SELECT')) {
node.style.fontSize = '16px';
}
});
});
});
observer.observe(document.body, {
childList: true,
subtree: true
});
}
// Initialize all functions
function init() {
setupViewport();
applyNoZoomStyles();
observeNewElements();
}
// Run on DOMContentLoaded or immediately if already loaded
if (document.readyState === 'loading') {
document.addEventListener('DOMContentLoaded', init);
} else {
init();
}
})();