如何在IE中为输入框设置占位符
我正在尝试为 IE 中的输入框设置占位符。但它没有用...
<script>
// This adds 'placeholder' to the items listed in the jQuery .support object.
jQuery(function() {
jQuery.support.placeholder = false;
test = document.createElement('input');
if('placeholder' in test) jQuery.support.placeholder = true;
});
// This adds placeholder support to browsers that wouldn't otherwise support it.
$(function() {
if(!$.support.placeholder) {
var active = document.activeElement;
$(':text').focus(function () {
if ($(this).attr('placeholder') != '' && $(this).val() == $(this).attr('placeholder')) {
$(this).val('').removeClass('hasPlaceholder');
}
}).blur(function () {
if ($(this).attr('placeholder') != '' && ($(this).val() == '' || $(this).val() == $(this).attr('placeholder'))) {
$(this).val($(this).attr('placeholder')).addClass('hasPlaceholder');
}
});
$(':text').blur();
$(active).focus();
$('form:eq(0)').submit(function () {
$(':text.hasPlaceholder').val('');
});
}
});
我正在使用 jQuery 来做到这一点。第一个我定义“占位符”,第二个我添加浏览器的占位符支持。
I'm trying to set placeholder for input box in IE. But it did not work ...
<script>
// This adds 'placeholder' to the items listed in the jQuery .support object.
jQuery(function() {
jQuery.support.placeholder = false;
test = document.createElement('input');
if('placeholder' in test) jQuery.support.placeholder = true;
});
// This adds placeholder support to browsers that wouldn't otherwise support it.
$(function() {
if(!$.support.placeholder) {
var active = document.activeElement;
$(':text').focus(function () {
if ($(this).attr('placeholder') != '' && $(this).val() == $(this).attr('placeholder')) {
$(this).val('').removeClass('hasPlaceholder');
}
}).blur(function () {
if ($(this).attr('placeholder') != '' && ($(this).val() == '' || $(this).val() == $(this).attr('placeholder'))) {
$(this).val($(this).attr('placeholder')).addClass('hasPlaceholder');
}
});
$(':text').blur();
$(active).focus();
$('form:eq(0)').submit(function () {
$(':text.hasPlaceholder').val('');
});
}
});
I'm using jQuery to do this. The first I define "placeholder" and the second I add the placeholder support for browser.
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我不确定,但如果您使用框架来执行此操作,您将遇到
document.activeElement
的问题。尝试对其进行注释并调用$(active).focus();
。I'm not sure, but if you are using frames to do this, you'll run into a problem with
document.activeElement
. Try commenting that and the call to$(active).focus();
out.