Are double quotes supported in a JSON string?

Question

When I escape double quotes via \\" in a JSON string the parser fails. However, when I use JSON.stringify it is capable of properly escaping the string somehow.

I suspect that I'm not escaping the double quotes properly. Look to the code for more detail.

 var data = { "singleQuoteHtml": "<span class='qwer'>content</span>", "doubleQuoteHtml": "<span class=\\"qwer\\">content</span>", "singleQuote": "'hi'", "doubleQuote": "\\"hi\\"" }; var dataString = '{"singleQuoteHtml": "<span class=\\'qwer\\'>content</span>",' + '"doubleQuoteHtml": "<span class=\\"qwer\\">content</span>",' + '"singleQuote": "\\'hi\\'",' + '"doubleQuote": "\\"hi\\"' + '}'; function Parse() { //Stringify is capable of creating single quotes and double quotes console.log(JSON.parse(JSON.stringify(data))); //When I escape double quotes myself the parser fails //Uncomment to see failure //console.log(JSON.parse(dataString)); } 

 <button onclick="Parse();">Parse JSON </button> 

Answer 1

The string literal '... "\\"hi\\""...' evaluates to ""hi"" , without backslashes.

The backslashes are swallowed as escape sequences by the string literal.

You need to escape your backslashes as \\\\ to put actual backslashes in your string.