如何在 JavaScript 中嵌入 Ruby(Rails + .html.erb 文件) [英] How to embed Ruby in JavaScript (Rails + .html.erb file)

问题描述

我有一个 .html.erb 文件，其中包含一些 javascript.我想做这样的事情:

var stuff = '
<%= @ruby_var.title %>
'

这样做的最佳方法是什么?我可能完全不在状态...谢谢.

解决方案

要安全地执行此操作，您需要使用 to_json:

<%= javascript_tag do %>var 东西 = <%= @ruby_var.title.to_json %>;<%结束%>

如果@ruby_var.title 中有引号，这将确保您的代码不会中断.

要包含我会做的 div:

<%= javascript_tag do %>var stuff = <%= "<div>#{@ruby_var.title}</div>".to_json %>;<%结束%>

请注意 <%= %> 周围没有引号，to_json 会为您处理.

I have a .html.erb file, with some javascript in it. I would like to do something like this:

var stuff = '<div><%= @ruby_var.title %></div>'

What is the best way to do this? I may be totally off... Thanks.

解决方案

To safely do this you need to use to_json:

<%= javascript_tag do %>
  var stuff = <%= @ruby_var.title.to_json %>;
<% end %>

This will ensure your code does not break if @ruby_var.title has a quote in it.

To include the divs I would do:

<%= javascript_tag do %>
  var stuff = <%= "<div>#{@ruby_var.title}</div>".to_json %>;
<% end %>

Note that there are no quotes around <%= %>, to_json takes care of that for you.

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