JavaScript - convert string variable to json text

In this article, we would like to show you how to convert string variables to JSON text in JavaScript.

1. JSON.stringify example

// ONLINE-RUNNER:browser;

var text = 'This is example text...';
var json = JSON.stringify(text);

console.log(json);

2. Custom conversion method example

// ONLINE-RUNNER:browser;

var expressions = [ 
    // operations order is important
    { rule: /\\/g, result: '\\\\' },
  	{ rule: /"/g,  result: '\\"' }
];

function serializeString(text) {
  	if(text) {
        for(var i = 0; i < expressions.length; ++i) {
            var expression = expressions[i];

            text = text.replace(expression.rule, expression.result);
        }

        return '"' + text + '"';
    }
  
  	return null;
}

// Example:

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

console.log(json);

See also

1. JavaScript - serialize object to json