js不让电脑端浏览器缩放网页

 document.addEventListener('DOMContentLoaded', function (event) { //chrome浏览器
 document.body.style.zoom = 'reset'; document.addEventListener('keydown', function (e) { if ((e.ctrlKey === true || e.metaKey === true) &&
 (e.which === 61 || e.which === 107 || e.which === 173 || e.which === 109
 || e.which === 187 || e.which === 189)) {
 e.preventDefault();
 }
 }, false); document.addEventListener('mousewhell DOMMouseScroll', function (e) { if (e.ctrlKey === true || e.metaKey === true) {
 e.preventDefault();
 }
 }, false);
 }, false);