禁用和启用滚动

Question

this javascript code is work fine:

function scrolling(bool) {
  if (typeof(bool) == "undefined") {
    document.ontouchstart = function(e) { e.stopPropagation(); }
  } else {
    document.ontouchstart = function(e) { e.preventDefault(); }
  }
}

put it disable scrolling for all elements, and I want to disable scrolling for "BODY" element only and keep the scolling for all child elements

Answer 1

This should work:

function scrolling(bool) {
    var deny = function(e) { if (e.target === e.currentTarget) e.preventDefault(); };
    if (bool) {
        document.body.removeEventListener('touchstart', deny);
        document.body.removeEventListener('touchmove', deny);
    } else {
        document.body.addEventListener('touchstart', deny, false);
        document.body.addEventListener('touchmove', deny, false);
    }
}