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场景：Chrome v51.0.2704，Bootstrap v2.3.2，Windows 10 v1511。请参阅下面的代码片段。我已经排除了不适用于这种情况的Bootstrap CSS。（推特）引导按钮输入在悬停时闪烁
问题：如鼠标在元素上快速移动和退出时可以看到的，背景显示为随机出现“闪烁”，浅蓝色水平线出现一会儿。
这似乎不会发生在Firefox v46，IE v11或Edge v25上。
button,
input,
select,
textarea {
margin: 0;
font-size: 100%;
vertical-align: middle;
}
button,
input {
*overflow: visible;
line-height: normal;
}
button::-moz-focus-inner,
input::-moz-focus-inner {
padding: 0;
border: 0;
}
button,
html input[type="button"],
input[type="reset"],
input[type="submit"] {
cursor: pointer;
-webkit-appearance: button;
}
label,
select,
button,
input[type="button"],
input[type="reset"],
input[type="submit"],
input[type="radio"],
input[type="checkbox"] {
cursor: pointer;
}
label,
input,
button,
select,
textarea {
font-size: 14px;
font-weight: normal;
line-height: 20px;
}
input,
button,
select,
textarea {
font-family: "Helvetica Neue", Helvetica, Arial, sans-serif;
}
input,
textarea,
.uneditable-input {
width: 206px;
}
input[type="file"],
input[type="image"],
input[type="submit"],
input[type="reset"],
input[type="button"],
input[type="radio"],
input[type="checkbox"] {
width: auto;
}
input:-moz-placeholder,
textarea:-moz-placeholder {
color: #999999;
}
input:-ms-input-placeholder,
textarea:-ms-input-placeholder {
color: #999999;
}
input::-webkit-input-placeholder,
textarea::-webkit-input-placeholder {
color: #999999;
}
input,
textarea,
.uneditable-input {
margin-left: 0;
}
.btn {
display: inline-block;
*display: inline;
padding: 4px 12px;
margin-bottom: 0;
*margin-left: .3em;
font-size: 14px;
line-height: 20px;
color: #333333;
text-align: center;
text-shadow: 0 1px 1px rgba(255, 255, 255, 0.75);
vertical-align: middle;
cursor: pointer;
background-color: #f5f5f5;
*background-color: #e6e6e6;
background-image: -moz-linear-gradient(top, #ffffff, #e6e6e6);
background-image: -webkit-gradient(linear, 0 0, 0 100%, from(#ffffff), to(#e6e6e6));
background-image: -webkit-linear-gradient(top, #ffffff, #e6e6e6);
background-image: -o-linear-gradient(top, #ffffff, #e6e6e6);
background-image: linear-gradient(to bottom, #ffffff, #e6e6e6);
background-repeat: repeat-x;
border: 1px solid #cccccc;
*border: 0;
border-color: #e6e6e6 #e6e6e6 #bfbfbf;
border-color: rgba(0, 0, 0, 0.1) rgba(0, 0, 0, 0.1) rgba(0, 0, 0, 0.25);
border-bottom-color: #b3b3b3;
-webkit-border-radius: 4px;
-moz-border-radius: 4px;
border-radius: 4px;
filter: progid:DXImageTransform.Microsoft.gradient(startColorstr='#ffffffff', endColorstr='#ffe6e6e6', GradientType=0);
filter: progid:DXImageTransform.Microsoft.gradient(enabled=false);
*zoom: 1;
-webkit-box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.2), 0 1px 2px rgba(0, 0, 0, 0.05);
-moz-box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.2), 0 1px 2px rgba(0, 0, 0, 0.05);
box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.2), 0 1px 2px rgba(0, 0, 0, 0.05);
}
.btn:hover,
.btn:focus,
.btn:active,
.btn.active,
.btn.disabled,
.btn[disabled] {
color: #333333;
background-color: #e6e6e6;
*background-color: #d9d9d9;
}
.btn:first-child {
*margin-left: 0;
}
.btn:hover,
.btn:focus {
color: #333333;
text-decoration: none;
background-position: 0 -15px;
-webkit-transition: background-position 0.1s linear;
-moz-transition: background-position 0.1s linear;
-o-transition: background-position 0.1s linear;
transition: background-position 0.1s linear;
}
.btn-large {
padding: 11px 19px;
font-size: 17.5px;
-webkit-border-radius: 6px;
-moz-border-radius: 6px;
border-radius: 6px;
}
.btn-primary {
color: #ffffff;
text-shadow: 0 -1px 0 rgba(0, 0, 0, 0.25);
background-color: #006dcc;
*background-color: #0044cc;
background-image: -moz-linear-gradient(top, #0088cc, #0044cc);
background-image: -webkit-gradient(linear, 0 0, 0 100%, from(#0088cc), to(#0044cc));
background-image: -webkit-linear-gradient(top, #0088cc, #0044cc);
background-image: -o-linear-gradient(top, #0088cc, #0044cc);
background-image: linear-gradient(to bottom, #0088cc, #0044cc);
background-repeat: repeat-x;
border-color: #0044cC#0044cC#002a80;
border-color: rgba(0, 0, 0, 0.1) rgba(0, 0, 0, 0.1) rgba(0, 0, 0, 0.25);
filter: progid:DXImageTransform.Microsoft.gradient(startColorstr='#ff0088cc', endColorstr='#ff0044cc', GradientType=0);
filter: progid:DXImageTransform.Microsoft.gradient(enabled=false);
}
.btn-primary:hover,
.btn-primary:focus,
.btn-primary:active,
.btn-primary.active,
.btn-primary.disabled,
.btn-primary[disabled] {
color: #ffffff;
background-color: #0044cc;
*background-color: #003bb3;
}
button.btn,
input[type="submit"].btn {
*padding-top: 3px;
*padding-bottom: 3px;
}
button.btn::-moz-focus-inner,
input[type="submit"].btn::-moz-focus-inner {
padding: 0;
border: 0;
}
button.btn.btn-large,
input[type="submit"].btn.btn-large {
*padding-top: 7px;
*padding-bottom: 7px;
}<input type="submit" name="submit" class="btn btn-primary btn-lg">
由于过渡非常快（0.1秒），我们可能更喜欢移除这种效应，因为用户不那么明智。特别是在按钮上悬停时，这种效果并不是那么必要。因此，我们可能会从.btn：hover，.btn：focus或者将其覆盖到我们的css中：'.btn：hover，.btn：focus {transition-duration：0;}'。我知道这不是真正的解决方案，但如果你测试它，你会看到没有显着的区别！ –