Question

我正在迁移远离Microsoft Access的客户的员工已经习惯通过表单字段按Enter到Tab，尽管如此，这种情况很奇怪。所以我需要在preventDefault事件上window.onsubmit，只定义event.keyCode！

window.onsubmit = function(event)
{
 alert('event.keyCode = '+event.keyCode);
}

以下是JavaScript在event参数上返回的方法，对象和属性的列表......

window.onsubmit.event.isTrusted
window.onsubmit.event.stopPropagation
window.onsubmit.event.stopImmediatePropagation
window.onsubmit.event.preventDefault
window.onsubmit.event.initEvent
window.onsubmit.event.getPreventDefault
window.onsubmit.event.type
window.onsubmit.event.target
window.onsubmit.event.currentTarget
window.onsubmit.event.eventPhase
window.onsubmit.event.bubbles
window.onsubmit.event.cancelable
window.onsubmit.event.defaultPrevented
window.onsubmit.event.timeStamp
window.onsubmit.event.originalTarget
window.onsubmit.event.explicitOriginalTarget
window.onsubmit.event.NONE
window.onsubmit.event.CAPTURING_PHASE
window.onsubmit.event.AT_TARGET
window.onsubmit.event.BUBBLING_PHASE
window.onsubmit.event.ALT_MASK
window.onsubmit.event.CONTROL_MASK
window.onsubmit.event.SHIFT_MASK
window.onsubmit.event.META_MASK

Answer 1

除了ondemand JavaScript我的工作涉及（服务器编译）index.js和events.js，所有window.onevent处理程序都存储在events.js文件中。虽然它显然不是直接可能的，但仍然间接可能阻止Enter密钥提交表单。此外，keypress事件似乎会触发click事件，可能是出于辅助目的。我还包括一个解决方案，以确定哪个事件首先发生;触发click事件后，每个浏览器在0~20ms之间触发keypress事件，因此我考虑确保范围为0~50ms。以下是事件触发器和代码之间的浏览器响应时间......

Chrome 39.0

Firefox 31.0 ESR：18~20ms

IE 11 ：2~4ms

Opera 12.1 ：0ms

var option = new function() {this.name = '';}


window.onclick = function(event)
{
 option.clickDate = new Date().getTime();
}


window.onkeypress = function(event)
{
 option.keyCode = event.keyCode;
 option.keyCodeDate = new Date().getTime();
}


window.onsubmit = function(event)
{
 if (option.keyCodeDate && option.clickDate && 
 ((option.clickDate - option.keyCodeDate)>=0 && 
 (option.clickDate - option.keyCodeDate)<51) && 
 option.keyCode==13) {event.preventDefault();}
 {
  event.preventDefault();
 }
}

JavaScript window.onsubmit event.keyCode undefined

1 个答案: