JavaScript What does this regex do (/“([^”]+(?=“))”/g, '$1')? what does this emoji mean,what does this mean �&#

I'm debugging someone's code and wondering what this regex does?

Code:

<script>

 var t = document.getElementById("filterVal").value;
 var s = filterVal.replace(/"([^"]+(?="))"/g, '$1')

</script>
Answer:1

It removes a balanced count of double quotes.

console.log('a"bc"de"f'.replace(/"([^"]+)(?=")"/g, '$1'));
console.log('a"bc"d"e"f'.replace(/"([^"]+)(?=")"/g, '$1'));

// a version without a positive lookahead (looks like the same result)
console.log('a"bc"de"f'.replace(/"([^"]+)"/g, '$1'));
console.log('a"bc"d"e"f'.replace(/"([^"]+)"/g, '$1'));
Answer:2

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