how to pass parse json value through javascript

Question

I'm trying to get the JSON object from a JSON outputted string from a Rails app. Currently in JavaScript I'm doing:

data = "<%= @chromosomes%>";

However, since there are quotes at the beginning and end of the JSON object, it is not being rendered as a JSON object. Instead it is doing something like

data = "[{"name"=>"YHet","organism_id"=>"4ea9b90e859723d3f7000037"}]"

Is there a way that I can remove the beginning and end quotes so that the object is treated as an array instead of a string?

What type is chromosomes? Is it a raw string (and if so, why)? Does it come from to_json? Other? — user2864740
– user2864740, Commented Jul 9, 2015 at 6:11

Tushar · Accepted Answer · 2015-07-09 05:51:55Z

1

Use JSON.parse to parse string into JSON object.

data = JSON.parse('<%= @chromosomes%>');

answered Jul 9, 2015 at 5:51

Tushar

87.4k21 gold badges164 silver badges182 bronze badges

Sign up to request clarification or add additional context in comments.

1 Comment

user2864740 Over a year ago

Not safe for ' or </script etc. (There has to be some 'universal' solution..)

Santanu Karmakar · Accepted Answer · 2015-07-09 05:57:48Z

1

Use html_safe in the view, no quotes:

<script>
  data = <%= @chromosomes.html_safe %>;
</script>

answered Jul 9, 2015 at 5:57

Santanu Karmakar

3461 gold badge3 silver badges10 bronze badges

3 Comments

user2864740 Over a year ago

Can potentially lead to problems with escaping (or lack of), same as with the other current answers.

Santanu Karmakar Over a year ago

how? in the question, it says, JSON outputted string, so, I am expecting in controller he is using @chromosomes.to_json

user2864740 Over a year ago

Assumptions are assumptions .. I asked the OP for clarification. In any case it would still fail on </script. As with all my comments I am trying to elicit some One True For All Time approach.

ImHigh · Accepted Answer · 2015-07-09 06:24:46Z

1

data = '<%= @chromosomes%>'; var result = JSON.parse(data);

if you do console.log(result), it outputs a json object. This is a pure JavaScript approach and you require a reasonably modern browser that supports parsing JSON into a native object.

answered Jul 9, 2015 at 6:24

ImHigh

1911 silver badge5 bronze badges

Collectives™ on Stack Overflow

how to pass parse json value through javascript

3 Answers 3

1 Comment

3 Comments

Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

3 Answers 3

1 Comment

3 Comments

Comments

Your Answer

Sign up or log in

Post as a guest

Related