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javascriptcharactereofinvisible

Invisible character leads to Unexpected EOF error

While trying to handle a string I am facing

Error: SyntaxError: Unexpected EOF

I have no control on how the string is generated. I managed to isolate the problematic character(s) by dichotomy with substring(), however it doesn't get printed either by console.log() or by JSON.parse() : I get

> console.log(c);
""
> JSON.parse(c);
""

yet

> c.length;
1

All I know is that it is followed by a \n.

How can I identify it and get rid of it ?

Update

> console.log(encodeURIComponent(c));
%E2%80%A8

Is this even a character ??

Solution

  • Assuming this is the only problematic character, and since its percent-encoding has been identified, a solution is to replace the decoded percent-encoding string :

    > c.length;
1
> let badchar = decodeURI("%E2%80%A8");
> let regex = new RegExp(badchar, "g");
> newc = c.replace(regex, "");
> newc.length;
0

    Or if for some reason RegExp is not available :

    > newc = c.split(badchar).join("")