JavaScript中的Django模板标记 - 无引号的无效语法，带引号的无效语法 [英] Django template tags in JavaScript - invalid syntax without quotes, invalid syntax with quotes

问题描述

可以从Django模板标签（如 var spec ={{foo}}; 。

It is possible you have Javascript read vars from Django template tags like var spec = "{{ foo }}";.

但是，如果foo需要是一个JSON对象。它变成如下：

However, if foo needs to be a JSON object. it becomes like this:

var spec = "{"2": {"guid": 2, "contentBlocks": {"2_1": {"guid": "2_1", "type": "list"}}}}";

前面和后面的引号使得这是一个无效的JavaScript语法，但是如果我把它留下，也是一个无效的语法 var spec = {{foo}};

The preceding and closing quotes make this an invalid JavaScript syntax, however, if I leave them out, it is also an invalid syntax var spec = {{ foo }};

什么是最好的解决方法这个问题？要么有 foo 输出完整的< script>< / script> 块，或者让JavaScript请求对象，而不是通过模板标签输出？ ......

What would be the best way to solve this problem? Either to have foo output the complete <script></script> block, or to have JavaScript request this object from the server, instead of outputting it via a template tag? ......

推荐答案

如果是JSON对象，则不需要引用它。 JSON语法是有效的Javascript语法（尽管当然不一定是正确的）。

If it's a JSON object, it doesn't need to be quoted at all. JSON syntax is valid Javascript syntax (although of course the reverse is not necessarily true).

var spec = {{ foo }};

如果 foo 评估为JSON字符串。

is perfectly good if foo evaluates to a JSON string.

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