<script> | |
function checkProtos(expect) { | |
var allMatch = true; | |
for (var obj of [window, Document.prototype, HTMLElement.prototype, SVGElement.prototype]) { | |
for (var prop of ['ontouchstart', 'ontouchend', 'ontouchmove', 'ontouchcancel']) { | |
var result = prop in obj; | |
if (result !== expect) | |
allMatch = false; | |
} | |
} | |
return allMatch; | |
} | |
</script> |