Javascript focusin/focusout和focus/blur之间的区别,举例说明
有谁能用一个简单的例子告诉我Javascript focusin/focusout和focus/blur之间的区别,举例说明,javascript,jquery,Javascript,Jquery,有谁能用一个简单的例子告诉我blur和focusout,focus和focusin之间的区别吗?focusin和focusout事件气泡,而focus和blur事件没有。这意味着您可以在表单字段的父元素上使用focusin和focusout 演示: HTML: Javascript: $('.parent') .focusin(function(){log('div focusin');}) .focusout(function(){log('div focusout');}
blur
和focusout
,focus
和focusin
之间的区别吗?focusin和focusout
事件气泡,而focus
和blur
事件没有。这意味着您可以在表单字段的父元素上使用focusin
和focusout
演示:
HTML:
Javascript:
$('.parent')
.focusin(function(){log('div focusin');})
.focusout(function(){log('div focusout');})
.focus(function(){log('div focus');})
.blur(function(){log('div blur');});
$('input')
.focusin(function(){log('input focusin');})
.focusout(function(){log('input focusout');})
.focus(function(){log('input focus');})
.blur(function(){log('input blur');});
function log(str){
$('.log').append($('<div/>').text(str));
}
$(“.parent”)
.focusin(函数(){log('div focusin');})
.focusout(函数(){log('div focusout');})
.focus(函数(){log('div focus');})
.blur(函数(){log('div blur');});
$(“输入”)
.focusin(函数(){log('input focusin');})
.focusout(函数(){log('input focusout');})
.focus(函数(){log('input focus');})
.blur(函数(){log('input blur');});
函数日志(str){
$('.log').append($('.text(str));
}
运行它时,您会看到只有输入获取所有事件,父级仅获取
聚焦in
和聚焦out
事件。聚焦和模糊事件跟踪用户聚焦的元素
例如,2015年8月-Firefox仍然不支持focusin/focusout()。伙计,他们真的丢了球…@ArnaudLeyder:是的,它还没有在Firefox中实现,但是jQuery模仿了它。是的,你说得对。因为我没有在此项目中使用jQuery,所以我使用了polyfill:
$('.parent')
.focusin(function(){log('div focusin');})
.focusout(function(){log('div focusout');})
.focus(function(){log('div focus');})
.blur(function(){log('div blur');});
$('input')
.focusin(function(){log('input focusin');})
.focusout(function(){log('input focusout');})
.focus(function(){log('input focus');})
.blur(function(){log('input blur');});
function log(str){
$('.log').append($('<div/>').text(str));
}