How do I evaluate JS and return value with Elisp? #836

c1-g · 2021-08-28T03:17:36Z

c1-g
Aug 28, 2021

The wiki recommend this snippet to evaluate JS in Python,

text = self.buffer_widget.execute_js("get_selection();")

So to replicate this in elisp, I opened an eaf-browser buffer on a ramdom website,
select some text, and evaluate this,

(eaf-call-sync "call_function_with_args" eaf--buffer-id "execute_js" "get_selection();")

And it gave me this message,
[EAF/browser] Cannot call function: execute_js

So this time, I use eval_js instead,

(eaf-call-sync "call_function_with_args" eaf--buffer-id "eval_js" "get_selection();")

And it gave me this,
apply: Wrong type argument: stringp, (error "\"TypeError('eval_js() takes 1 positional argument but 2 were given')\"")

Did I do something wrong? Can you give me some guide? That would be really helpful, thanks.

Answered by manateelazycat

Upgrade EAF and make sure JavaScript function's name is attribue of window object.

And call JS function like below:

(eaf-call-sync "execute_js_function" eaf--buffer-id "function_name" "function_args")

manateelazycat · 2021-08-28T07:59:19Z

Upgrade EAF and make sure JavaScript function's name is attribue of window object.

And call JS function like below:

(eaf-call-sync "execute_js_function" eaf--buffer-id "function_name" "function_args")

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