我搜索了互联网和stackoverflow的答案,但没有一个答案适合我,我无法将nodejs安装到我的服务器上.
我使用的是Rails 3.2.3,Ruby 1.9.3p374.
当我运行'bundle install'和'bundle update'时,我没有收到任何错误.
运行'rails s'后出现错误:
/home/Nameo0/.rvm/gems/ruby-1.9.3-p374@rails3tutorial2ndEd/gems/execjs-1.4.0/lib/execjs/runtimes.rb:51:in `autodetect': Could not find a JavaScript runtime. See https://github.com/sstephenson/execjs for a list of available runtimes. (ExecJS::RuntimeUnavailable)
from /home/Nameo0/.rvm/gems/ruby-1.9.3-p374@rails3tutorial2ndEd/gems/execjs-1.4.0/lib/execjs.rb:5:in `<module:ExecJS>'
from /home/Nameo0/.rvm/gems/ruby-1.9.3-p374@rails3tutorial2ndEd/gems/execjs-1.4.0/lib/execjs.rb:4:in `<top (required)>'
from /home/Nameo0/.rvm/gems/ruby-1.9.3-p374@rails3tutorial2ndEd/gems/coffee-script-2.2.0/lib/coffee_script.rb:1:in `require'
from /home/Nameo0/.rvm/gems/ruby-1.9.3-p374@rails3tutorial2ndEd/gems/coffee-script-2.2.0/lib/coffee_script.rb:1:in `<top (required)>'
from /home/Nameo0/.rvm/gems/ruby-1.9.3-p374@rails3tutorial2ndEd/gems/coffee-script-2.2.0/lib/coffee-script.rb:1:in `require'
from /home/Nameo0/.rvm/gems/ruby-1.9.3-p374@rails3tutorial2ndEd/gems/coffee-script-2.2.0/lib/coffee-script.rb:1:in `<top (required)>'
from /home/Nameo0/.rvm/gems/ruby-1.9.3-p374@rails3tutorial2ndEd/gems/coffee-rails-3.2.2/lib/coffee-rails.rb:1:in `require'
from /home/Nameo0/.rvm/gems/ruby-1.9.3-p374@rails3tutorial2ndEd/gems/coffee-rails-3.2.2/lib/coffee-rails.rb:1:in `<top (required)>'
from /home/Nameo0/.rvm/gems/ruby-1.9.3-p374@global/gems/bundler-1.2.3/lib/bundler/runtime.rb:68:in `require'
from /home/Nameo0/.rvm/gems/ruby-1.9.3-p374@global/gems/bundler-1.2.3/lib/bundler/runtime.rb:68:in `block (2 levels) in require'
from /home/Nameo0/.rvm/gems/ruby-1.9.3-p374@global/gems/bundler-1.2.3/lib/bundler/runtime.rb:66:in `each'
from /home/Nameo0/.rvm/gems/ruby-1.9.3-p374@global/gems/bundler-1.2.3/lib/bundler/runtime.rb:66:in `block in require'
from /home/Nameo0/.rvm/gems/ruby-1.9.3-p374@global/gems/bundler-1.2.3/lib/bundler/runtime.rb:55:in `each'
from /home/Nameo0/.rvm/gems/ruby-1.9.3-p374@global/gems/bundler-1.2.3/lib/bundler/runtime.rb:55:in `require'
from /home/Nameo0/.rvm/gems/ruby-1.9.3-p374@global/gems/bundler-1.2.3/lib/bundler.rb:128:in …javascript centos ruby-on-rails ruby-on-rails-3 ruby-on-rails-3.2
我试图做到这样，当我点击 html 中的提交按钮时，我们在输入字段中的值替换 P 元素内具有 id“numberz”的项目。
我可以得到代码来做到这一点，但网站立即变回在 P 元素中使用默认值，其 id 为“numberz”。
如何防止网站改回硬编码到 HTML 文件中的元素的默认值？
<!DOCTYPE html>
<html>
<head>
<title>JS test</title>
<script>
function e() {
var x = document.getElementById("numberz");
var z = document.getElementById("num").value;
//alert(x.innerHTML + " s " + z);//
x.innerHTML= z;
};
</script>
</head>
<body>
<p>The number is:</p>
<p id = "numberz">s</p>
<br>
<br>
<form onsubmit = "return e();">
<input id = "num" type = "text" size = "4" placeholder = "test"/>
<input type = "submit" value = "Submit"/>
</form> …当我将鼠标悬停在表格中的h4标签上时,一切正常.但是,当我将鼠标悬停在位于h4元素内的强标记上时,强标记会获得与h4标记相同的悬停.
我有一个表元素,每个td元素的结构如下所示:
<td>
<a>
<div>
<h4>
...<strong>...</strong>...
</h4>
</div>
</a>
</td>
这是影响表中元素的CSS.
h4 {
font-weight: 100;
margin: 0px;
padding: 12px 0px;
color: black;
}
a {
text-decoration: none;
}
a:visited {
color: white;
background-color: none;
}
strong :hover {
background: none !important;
background-color: transparent !important;
}
/*Used for the gradient on hover for the background*/
.itemTrue > a > div :hover {
color: white;
background: #e4e4e4;
background: -moz-linear-gradient(top, #e4e4e4 0%, #295534 73%, #1d3923 88%, #000000 100%);
background: -webkit-gradient(linear, left top, …