unexpected token } in JSON at position 351 while parsing near '…“license”: “ISC”,

Question

I'm new to JavaScript and JSON and I'm trying to upload my NPM package. For some reason, I get this error when I try to publish it:

Unexpected token } in JSON at position 351 while parsing near '..."license": "ISC",

},
"bugs": {
"e..."

Here's my JSON file.

{
"name": "M-P-Formulas-JS",
"version": "1.0.0",
"description": "The M-P-Formulas package for JavaScript. This package allows the user to use math and physics formulas such as the Pythagorean Theorem.",
"main": "mpformulasJS.js",
"author": {
    "email": "8b21espq@gmail.com",
    "name": "Jeff Lockhart",
    "url": "",
    "license": "ISC",
},
"bugs": {
    "email": "8b21espq@gmail.com",
},
"dependencies": {
    "Math": "",
},
"keywords": [
    "mpformulas",
    "mpformulasjs",
    "m-p-formulas-js",
    "math",
    "physics",
    "formulas",
    "module",
    "package",
 ],
}

I even ran npm cache clean but, since it did not work, I can assure that my code is wrong. If so, how can I solve this?

Thank you.

Answer 1

Remove the extra comma because it's the last item before closing the object. It results in an invalid JSON.

"license": "ISC", // <--- Remove this comma

"bugs": {
    "email": "8b21espq@gmail.com", // <--- Remove this comma
}

JS objects and JSON are different. For instance, this is a valid JS object, but invalid JSON :

bugs : {
    email : "8b21espq@gmail.com",
}

Valid JSON would be :

"bugs": {
    "email": "8b21espq@gmail.com"
}

Answer 2

Remove the commas preceeding the closing braces and brackets. Use a comma only to separate elements. The last element should not have a trailing comma. Some parsers will let you get away with this but it's invalid JavaScript and JSON.

Here a tool for testing JSON formatting.

{
"name": "M-P-Formulas-JS",
"version": "1.0.0",
"description": "The M-P-Formulas package for JavaScript. This package allows the user to use math and physics formulas such as the Pythagorean Theorem.",
"main": "mpformulasJS.js",
"author": {
    "email": "8b21espq@gmail.com",
    "name": "Jeff Lockhart",
    "url": "",
    "license": "ISC",              <-- Lose the comma.
},
"bugs": {
    "email": "8b21espq@gmail.com", <-- Lose the comma.
},
"dependencies": {
    "Math": "",                    <-- Lose the comma.
},
"keywords": [
    "mpformulas",
    "mpformulasjs",
    "m-p-formulas-js",
    "math",
    "physics",
    "formulas",
    "module",
    "package",                     <-- Lose the comma.
 ],                                <-- Lose the comma.
}

Answer 3

Your JSON have unwanted , in end of the objects. So please try this below code to remove the , after the last item of every objects.

 var xx={ "name": "MP-Formulas-JS", "version": "1.0.0", "description": "The MP-Formulas package for JavaScript. This package allows the user to use math and physics formulas such as the Pythagorean Theorem.", "main": "mpformulasJS.js", "author": { "email": "8b21espq@gmail.com", "name": "Jeff Lockhart", "url": "", "license": "ISC", }, "bugs": { "email": "8b21espq@gmail.com", }, "dependencies": { "Math": "", }, "keywords": [ "mpformulas", "mpformulasjs", "mp-formulas-js", "math", "physics", "formulas", "module", "package", ], } var xxx=JSON.parse(JSON.stringify(xx).replace('",]','"]').replace('",}','"}')); console.log(xxx);