将javascript变量插入json字符串

Question

This should be super simple but I keep getting errors.

I have a JSON string that I need to add a js variable to, the code sample is below. Essentially I need to add frameVideo variable after the hash tag in the URL string.

var frameVideo = window.location.hash.substring(1);

jwplayer("sVid").setup({
'share-video': {
       'code': '<embed src="http://www.website.com/test.php#"\'.frameVideo.\'" width="480" height="270" allowfullscreen="true" />'
   },
});

What do I need to do differently?

Answer 1

You're using PHP concatenation instead of javascript style.

var frameVideo = window.location.hash.substring(1);

var JSON =  
{
       'code': '<embed src="http://www.website.com/test.php#"' + frameVideo + ' width="480" height="270" allowfullscreen="true" />'
   };

Answer 2

Use + instead of the . to concatenate your string.

Answer 3

I'm guessing you are just coming over to javascript from PHP, given the coding style. In javascript, we use + to concatinate, as opposed to the . in PHP.

JSON strings are essentially javascript objects:

var obj = {
    'share-video': {
        'code': '<embed src="http://www.website.com/test.php#' + frameVideo + '" width="480" height="270" allowfullscreen="true" />'
    }
}

You are also defining an index of an object outside of the context of an Object. 'variable':'something' is a syntax error when outside of an object. Objects are encapsulated within { and } . The above code is semantically correct.

When debugging javascript, always check your console logs. They can help pinpoint exactly what is causing a problem. If you didn't know how to activate the console, it is accessed with F12 in most browsers, or by right-click->inspect element. I recommend Google Chrome for javascript debugging.

Answer 4

Use + for concatenation.
No need to escape anything here either.
You have an extra double quote after the # .
You want to use double quotes for key names in JSON (it probably wouldn't make a difference here, but a good habit regardless)
You have a trailing comma after your "share-video" object.

var frameVideo = window.location.hash.substring(1);

jwplayer("sVid").setup({
    "share-video": {
        "code": '<embed src="http://www.website.com/test.php#' + frameVideo + '" width="480" height="270" allowfullscreen="true" />'
    }
});