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Changing the “placeholder” attribute of HTML5 input elements dynamically using Javascript

由 独自空忆成欢 提交于 2019-11-27 15:46:56
问题 I'm trying to dynamically update the HTML5 placeholder attribute of a text field using jQuery. $("textarea").attr("placeholder", "New placeholder text"); From Firebug, I can observe that the placeholder attribute is indeed changing. But in the rendered textarea element, it stays the same. Any suggestions? 回答1: If you are using Firebug I can assume you are using Firefox, and Firefox doesn't yet support placeholder attribute in the input fields itself. Placeholder feature detection I just tried

web前端入门到实战：五个最新的CSS特性以及如何使用它们

由 牧云@^-^@ 提交于 2019-11-27 15:42:37
虽然CSS简单，但CSS是一门非常有意思的语言，CSS每年都有变化，而且都有不同的博主都在不同的时间段总结一些CSS的新特性。虽然这些新特性无法立刻得到众多浏览器的支持，但总是随着时间的发展，这些特性都会得到浏览器的支持。哪怕未得到支持，也有一些方法让浏览器支持，比如最为出外的 cssnext ，就可以让很多未来的CSS特性就立马使用，并且不用花太多时间来考虑浏览器的兼容性。 接下来要介绍的五个CSS新特性是： CSS Display Module Level 3 ： display:contents CSS Conditional Rules Module Level 3 ： @support(...){...} CSS Overscroll Behavior Module Level 1 ： overscroll-behavior: contain CSS Selectors Module Level 4 ： :focus-within ， :placeholder-shown CSS Containment Module Level 1 ： contain:paint 这些CSS特性，估计有些同学已经接触过了，如果你未接触过，建议你继续跟随着下面的步骤继续往下阅读。 案例：创建一个新闻提要（Newsfeed） 通过一个新闻提要为例

ASP MVC Razor encode special characters in input placeholder

由 ▼魔方 西西 提交于 2019-11-27 14:38:01
This is my code: Model: [Required] [DataType(DataType.Text)] [Display(Name = "Your company's name")] public string CompanyName { get; set; } View: @Html.TextBoxFor(m => m.CompanyName, new { @class = "account-input", @placeholder = @Html.DisplayNameFor(m => m.CompanyName), @id = "companyname" }) It will be rendered like this: Your company's name html output: <input class="account-input" data-val="true" data-val-required="The Your company's name field is required." id="companyname" name="CompanyName" placeholder="Your company&#39;s name" type="text" value=""> It should be look like this: Your

html5 placeholder属性兼容ie11

由 心已入冬 提交于 2019-11-27 13:59:01
placeholder 属性是html5的属性，用于提供描述输入字段预期值的提示信息（hint）。 简单例子： <!DOCTYPE HTML> <html> <body> <form action="/test.do" method="get"> <input type="search" name="user_search" placeholder="请在此输入你的审批意见" /> <input type="submit" /> </form> </body> </html> 这个标签属性主要用于提示，未填写之前是会显示的，鼠标触发的时候，是会隐藏的 注意：placeholder 属性适用于以下的 类型：text, search, url, telephone, email 和password 好的，上面就是placeholder的简单用法简介，然后介绍一下placeholder的兼容性，placeholder在Chrome浏览器是正常的，不过在ie兼容性就很不好。 我是在ie11测试的，发现placeholder，鼠标点击时候是不会隐藏的，还是显示文字。 <textarea name="handleInfo.apprIdea" id="msg" class="form-control" placeholder="请在此输入您的审批意见" height="126px;" style

How to deal with “%1” in the argument of QString::arg()?

由 眉间皱痕 提交于 2019-11-27 13:37:56
问题 Everybody loves QString("Put something here %1 and here %2") .arg(replacement1) .arg(replacement2); but things get itchy as soon as you have the faintest chance that replacement1 actually contains %1 or even %2 anywhere. Then, the second QString::arg() will replace only the re-introduced %1 or both %2 occurrences. Anyway, you won't get the literal "%1" that you probably intended. Is there any standard trick to overcome this? If you need an example to play with, take this #include

HTML Placeholder browser compatibility

由 左心房为你撑大大i 提交于 2019-11-27 13:02:01
What browsers support the placeholder html tag for text inputs? Does Internet Explorer support it? (I have a JavaScript placeholder that I can use for the browsers that do not support it.) <input type=TEXT placeholder="placeholder here" /> Tim It is currently supported by all major browsers except IE 9 and earlier and Opera mini. For updates, look at the w3schools-specs Or even better, view this overview . For anyone interested, this is the jQuery Fallback that I use I use it with jQuery Validation Engine. Replace FORMCLASS with the class of your form. <!-- IF IE - use Placeholder Fallback -->

tf.placeholder

由 ⅰ亾dé卋堺 提交于 2019-11-27 12:53:43
tf.placeholder x = placeholder(dtype, shape=None, name=None) 可以理解为先占位，后面用数据feed， 注意： Placeholders are not compatible with eager execution. 所以在调用时，要加上下面这一句，才可以成功运行 tf.compat.v1.disable_eager_execution() 优于版本更新，用 tf.compat.v1. 来兼容tensorflow版本1的方法。 示例： import tensorflow as tf import numpy as np tf.compat.v1.disable_eager_execution() a = tf.compat.v1.placeholder(dtype=tf.int32) # 定义一个占位符Tensor b = tf.compat.v1.placeholder(dtype=tf.int32) c = a + b a_ = input("a = ") # 从终端读入一个整数并放入变量a_ b_ = input("b = ") sess = tf.compat.v1.Session() c_ = sess.run(c, feed_dict={a: a_, b: b_}) # feed

text-align: right; only for placeholder?

由 人盡茶涼 提交于 2019-11-27 11:53:09
how can active text-align: right; only for placeholder? <input type="text" name="airline_search" style="direction: ltr; border: none;" placeholder="ارلاین"> i want use of direction: ltr; for text(that typed to inpute), and text-align: right; for placeholder. /* webkit solution */ ::-webkit-input-placeholder { text-align:right; } /* mozilla solution */ input:-moz-placeholder { text-align:right; } Or try it with a :focus event: input[type='text']{ text-align:right; } input[type='text']:focus{ text-align:left; } This way, any placeholder even hard-coded will be held on right, and any text you

HTML5 textarea placeholder not appearing

由 …衆ロ難τιáo~ 提交于 2019-11-27 10:12:14
I cannot figure out what is wrong with my markup, but the placeholder for the text area will not appear. It seems as though it may be covered up with some blank spaces and tabs. When you focus on the text area and delete from where the cursor puts itself, then leave the text area, the proper placeholder then appears. <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd"> <html> <head> </head> <body> <form action="message.php" method="post" id="message_form"> <fieldset> <input type="email" name="email" id="email" title="Email address" maxlength="40"

Android add placeholder text to EditText

由 China☆狼群 提交于 2019-11-27 10:06:14
How can I add a placeholder text to EditText in the class that isn't in the XML? I have the following EditText in my code which will be shown in alertdialog: final EditText name = new EditText(this); LuxuryMode Ah, ok. What you're looking for is setHint(int) . Simply pass in a resource id of a string from your xml and you're good to go. EDIT And in XML, it's simply android:hint="someText" android:hint="text" provides an info for user that what he need to fill in particular editText for example :- i have two edittext one for numeric value and other for string value . we can set a hint for user
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