占位符在 IE9 中不起作用 [英] placeholder is not working in IE9
问题描述
我是 salesforce (SFDC) 开发人员.在我的输入框 Visualforce 页面中,我使用了占位符代码.
<label class="control-label visible-desktop" for="first_name">名字</label><div class="控件"><input class="input-block-level" name="First Name" id="first_name" placeholder="First Name" value="" type="text" required="required" autofocus="autofocus"/>
我在互联网上查看了一些 CSS hack,但没有找到.我发现了一些 javascript hack.
HTML5 占位符 jQuery 插件
https://github.com/mathiasbynens/jquery-placeholder
演示 &例子
http://mathiasbynens.be/demo/placeholder
但我不想使用 jQuery hack 之类的东西.
由于 IE9 不支持 placeholder 属性,您可以像这样在 Javascript/jQuery 中实现(快速编写,未测试):
if(navigator.appVersion.match(/MSIE [\d.]+/)){var placeholderText = '一些占位符文本';$('#first_name').val(placeholderText);$('#first_name').blur(function(){$(this).val() == '' ?$(this).val(placeholderText) : false;});$('#first_name').focus(function(){$(this).val() == placeholderText ?$(this).val('') : false;});}
对模糊事件也做同样的事情,然后模仿占位符属性.
好的,在重新考虑这个之后(由于评论)这真的不是最优雅的解决方案(但它确实有效),所以我会完全无视这个答案.
I am salesforce (SFDC) developer. In my visualforce page for input box I am using placeholder code.
<div class="control-group">
<label class="control-label visible-desktop" for="first_name">First Name</label>
<div class="controls">
<input class="input-block-level" name="First Name" id="first_name" placeholder="First Name" value="" type="text" required="required" autofocus="autofocus" />
</div>
</div>
I checked in internet for some CSS hack but I didn't find any. I find some javascript hack.
HTML5 Placeholder jQuery Plugin
https://github.com/mathiasbynens/jquery-placeholder
Demo & Examples
http://mathiasbynens.be/demo/placeholder
But I don't want to use jQuery hack or something.
As IE9 doesn't support the placeholder attribute, you can do it in Javascript/jQuery like so (quickly written, not tested):
if(navigator.appVersion.match(/MSIE [\d.]+/)){
var placeholderText = 'Some Placeholder Text';
$('#first_name').val(placeholderText);
$('#first_name').blur(function(){
$(this).val() == '' ? $(this).val(placeholderText) : false;
});
$('#first_name').focus(function(){
$(this).val() == placeholderText ? $(this).val('') : false;
});
}
Do the same for the blur event too, then that will mimic a placeholder attribute.
[Edit]
Okay, after rethinking this (due to the comment) this is really not the most elegant solution (however it does work), so I would disregard this answer totally.
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