Top community members
All Wiki Articles Create Wiki Article

Welcome to Dirask IT community! ❤ 💻
We are community of people that helps each other.

If you are beginner in IT field, you are more then welcome to ask questions, it will help you to learn faster. We are here to help you.

We are always beginner in something, we just need to remember it along the way.

there are no wrong questions - Ask Question

JavaScript - how to convert json text to string variable?

0 contributions
2 points

In JavaScript it is possible to convert json text to string variable in following way.

1. JSON.parse example

// ONLINE-RUNNER:browser;

function parseString(json) {
    var text = JSON.parse(json);

    if(typeof(text) == 'string') {
        return text;
    }

    throw new Error('Incorrect type!');
}

// Example:

var json = '"This is example text..."';
var text = parseString(json);

console.log(text);

2. Custom conversion method example

// ONLINE-RUNNER:browser;

var JsonUtils = new function() {
  var expression = /(\\*)"/g;

  function getContent(json) {
    if (json) {
      var limit = json.length - 1;

      if (json[0] == '"' && json[limit] == '"') {
        return json.substring(1, limit);
      }
    }

    return null;
  }

  this.parseString = function(json) {
    var content = getContent(json);

    if (content) {
      var result = content.replace(expression, function(value, escape) {
        if(escape.length % 2) {
          var result = '';

          for(var i = 1; i < escape.length; i += 2) {
            result += '\\';
          }

          return result + '"';
        }

        throw new Error('Incorrect json format!');
      });
    
      return result;
    }

    throw new Error('Incorrect json format!');
  }
};

// Example:

var json = '"Example SQL query: \\"SELECT * FROM `users`;\\""';
var text = JsonUtils.parseString(json);

console.log(text);

See also

  1. JavaScript - deserialize json to object
0 contributions

Checkout latest Findings & News:

Checkout latest questions:

Checkout latest wiki articles:

Hey 👋
Would you like to know what we do?
  • Dirask is IT community, where we share coding knowledge and help each other to solve coding problems.
  • We welcome everyone,
    no matter what the experience,
    no matter how basic the question is,
    this community will help you.
Read more