How to use the isJSON function from validator

Find comprehensive JavaScript validator.isJSON code examples handpicked from public code repositorys.

The validator.isJSON function checks whether a given string is valid JSON.

Alarm.js

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  return fc.getTimingConfig('alarm.dual_wan.cooldown') || super.getExpirationTime();
}

localizedNotificationContentArray() {
  let wan = this["p.active.wans"];
  if (_.isString(wan) && validator.isJSON(wan))
    wan = JSON.parse(this["p.active.wans"]);

  return [
    this["p.iface.name"],

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+ 9 other calls in file

express-validator2.js

GitHub: yinhaixiang/express-validator2

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  }
  return true;
},
isJSON: function(rule, value) {
  if (rule) {
    return validator.isJSON(value);
  }
  return true;
},
isMobilePhone: function(rule, value) {

+ 5 other calls in file

How does validator.isJSON work?

The validator.isJSON function is a part of the validator library and is used to check whether a given string is valid JSON. To accomplish this, the isJSON function first attempts to parse the string as a JSON object using JSON.parse. If the parse operation succeeds, the function returns true. Otherwise, it returns false. When parsing the string, JSON.parse throws an error if the input is not valid JSON. The isJSON function catches this error and returns false if it is thrown. By using the validator.isJSON function, developers can validate whether a string contains valid JSON data before attempting to parse it or use it in their applications. This can help prevent errors and improve the overall reliability of their code.

validations.js

GitHub: tarex/property-validator

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validations.isJSON = function isJSON(paramName, customMessage) {
  return checkParam(
    paramName,
    customMessage || message(paramName, 'should be a JSON'),
    validator.isJSON
  );
}

validations.isNull = function isNull(paramName, customMessage) {

nconf-validator.js

GitHub: mihirgokani007/nconf-validator

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  },
  isbn: function(x) {
    check(x, "a book number", validator.isISBN(x));
  },
  json: function(x) {
    check(x, "a JSON object", validator.isJSON(x));
  }
};


// Checks to be performed when a builtin

Ai Example

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const validator = require("validator");

const jsonStr = '{"name": "John", "age": 30, "city": "New York"}';
const invalidJsonStr = '{name: "John", age: 30, city: "New York"}';

if (validator.isJSON(jsonStr)) {
  console.log("Valid JSON:", jsonStr);
} else {
  console.log("Invalid JSON:", jsonStr);
}

if (validator.isJSON(invalidJsonStr)) {
  console.log("Valid JSON:", invalidJsonStr);
} else {
  console.log("Invalid JSON:", invalidJsonStr);
}

In this example, we're using the validator.isJSON function to check whether two strings contain valid JSON data. We define a jsonStr variable that contains a valid JSON string and an invalidJsonStr variable that contains an invalid JSON string. We use the isJSON function to check whether each of these strings contains valid JSON. We log a message to the console indicating whether the string is valid or invalid. When we run this code, it will output the following: css Copy code

main.js

GitHub: shaunakv1/node-chrome-har-replay

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      }
});




function thisfileIsValidJSON(fileName){
    console.log("Validate " + fileName +" :"+ validator.isJSON(fs.readFileSync('./har/'+fileName)));
    return validator.isJSON(fs.readFileSync('./har/'+fileName));
}

validate.js

GitHub: leonardosarmentocastro/cna

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  const fields = string.split(';');
  return fields.every(includesSortingSuffix);
};


const constraints = [
  {  field: 'c',  validator: (string) => isJSON(string) },
  {  field: 'l',  validator: (string) => isNumeric(string) && (string >= 1) },
  {  field: 'p',  validator: (string) => isNumeric(string) && (string >= 1) },
  {  field: 's',  validator: (string) => isInAgreementWithConvention(string) },
].map(constraint => ({ ...constraint, ...PAGINATION_ERROR_QUERY_PARAMETER_INVALID }));

+ 2 other calls in file

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