JavaScript Отключите щелчок правой кнопкой мыши
document.addEventListener('contextmenu', event => event.preventDefault());
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document.addEventListener('contextmenu', event => event.preventDefault());
document.addEventListener('contextmenu', event => event.preventDefault());
// ⇓ Test it (fiddle) ⇓
<body oncontextmenu="return false"> <div></div></body>
document.addEventListener('contextmenu', event => event.preventDefault());