如何在Rails视图中将Ruby变量传递给JavaScript函数?
我想知道在rails视图中将变量传递给JavaScript函数的最佳实践是什么。现在我正在做一些类似的事情:如何在Rails视图中将Ruby变量传递给JavaScript函数?,javascript,ruby-on-rails,prototypejs,Javascript,Ruby On Rails,Prototypejs,我想知道在rails视图中将变量传递给JavaScript函数的最佳实践是什么。现在我正在做一些类似的事情: <% content_for :javascript do %> <script type="text/javascript"> Event.observe(window, 'load', function(){ js_function(<%= @ruby_array.to_json %>, <%
<% content_for :javascript do %>
<script type="text/javascript">
Event.observe(window, 'load', function(){
js_function(<%= @ruby_array.to_json %>, <%= @ruby_var %>); )}
</script>
<% end %>
观察(窗口“加载”,函数(){
js_函数(,;)}
这是正确的方法吗?有一种叫做“不引人注目的javascript”的技术。这里有一个关于它的铁路司机:。它可以与jQuery原型一起工作。还有一些插件可以帮助简化文章中描述的一些任务。我发现gem可以帮助您轻松完成任务。有几个选项:
- content_for :javascripts_vars do
= "var costs_data = #{@records[:cost_mode][:data].to_json}".html_safe
= "var graph_data = #{@records[:cost_mode][:graph].to_json}".html_safe
escape\u javascript
别名:j
仅适用于字符串
转义在Javascript字符串中可能具有特殊含义的字符,
与反斜杠转义一样,转换为适合放入Javascript字符串文字引号中的格式
保持输入的html\u安全状态
,
因此需要
html\u-safe
否则会显示特殊的html字符,如HAML can数据中的,因此:
.position{data: {latitude: @claim.latitude.to_json, longitude: @claim.longitude.to_json}}
:javascript
var latitude = $('.position').data('latitude');
var longitude = $('.position').data('longitude');
请注意,如果您没有在视图中使用escape\u javascript
,您可以这样:
或者,如果这对您不起作用,请将输入复制到您的代码中,如果需要:
JS_ESCAPE_MAP = {
'\\' => '\\\\',
"</" => '<\/',
"\r\n" => '\n',
"\n" => '\n',
"\r" => '\n',
'"' => '\\"',
"'" => "\\'"
}
JS_ESCAPE_MAP["\342\200\250".dup.force_encoding(Encoding::UTF_8).encode!] = "
"
JS_ESCAPE_MAP["\342\200\251".dup.force_encoding(Encoding::UTF_8).encode!] = "
"
# Escapes carriage returns and single and double quotes for JavaScript segments.
#
# Also available through the alias j(). This is particularly helpful in JavaScript
# responses, like:
#
# $('some_element').replaceWith('<%= j render 'some/element_template' %>');
def escape_javascript(javascript)
if javascript
result = javascript.gsub(/(\\|<\/|\r\n|\342\200\250|\342\200\251|[\n\r"'])/u) { |match| JS_ESCAPE_MAP[match] }
javascript.html_safe? ? result.html_safe : result
else
""
end
end
JS_ESCAPE_MAP={
'\\' => '\\\\',
请你试着阅读这篇文章,以便更好地理解如何不回答。也就是说:“根本无法回答问题的答案”:仅仅是一个指向外部网站的链接
<%= content_tag 'div', '', id: 'data', data: {key1: 'val1', key2: 'val2'} %>
<%= javascript_tag do %>
$('#data').data('key1') === 'val1'
$('#data').data('key2') === 'val2'
<% end %>
gem 'gon'
gon.key1 = 'val1'
gon.key2 = 'val2'
<html>
<head>
<meta charset="utf-8"/>
<%= include_gon %>
<%= javascript_tag do %>
gon.key1 === 'val1'
gon.key2 === 'val2'
<% end %>
.position{data: {latitude: @claim.latitude.to_json, longitude: @claim.longitude.to_json}}
:javascript
var latitude = $('.position').data('latitude');
var longitude = $('.position').data('longitude');
require 'action_view/helpers/javascript_helper'
include ActionView::Helpers::JavaScriptHelper
# escape_javascript is available here.
JS_ESCAPE_MAP = {
'\\' => '\\\\',
"</" => '<\/',
"\r\n" => '\n',
"\n" => '\n',
"\r" => '\n',
'"' => '\\"',
"'" => "\\'"
}
JS_ESCAPE_MAP["\342\200\250".dup.force_encoding(Encoding::UTF_8).encode!] = "
"
JS_ESCAPE_MAP["\342\200\251".dup.force_encoding(Encoding::UTF_8).encode!] = "
"
# Escapes carriage returns and single and double quotes for JavaScript segments.
#
# Also available through the alias j(). This is particularly helpful in JavaScript
# responses, like:
#
# $('some_element').replaceWith('<%= j render 'some/element_template' %>');
def escape_javascript(javascript)
if javascript
result = javascript.gsub(/(\\|<\/|\r\n|\342\200\250|\342\200\251|[\n\r"'])/u) { |match| JS_ESCAPE_MAP[match] }
javascript.html_safe? ? result.html_safe : result
else
""
end
end