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I'm trying to build an html form that generates structured JSON code from the input values. This form uses repeat fields. I have to modify name attributes in cloned fields.

In Javascript I have a string 'menu-item[0][offers][0][price]'. I would like to replace 'menu-item[0]' with 'menu-item[1]', as in example at http://regexr.com/3gpnt I'm using RegExp, but is not required.

This is my experiment, but it doesn't work.

var string = 'menu-item[0][offers][price]';
var itemName = 'menu-item';
var regExp = new RegExp(itemName + '\[(.*?)\]', "");
var newString = string.replace(regExp, itemName + '[1]');
console.log(newString);
alert(newString);

Returns 'menu-item[0][offers][price]'.

Test on jsfiddle https://jsfiddle.net/lorenzodetomasi/dmnd7f9L/

Thank you.

Lorenzo De Tomasi
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  • https://jsfiddle.net/54ovu27y/1/ – Wiktor Stribiżew Sep 20 '17 at 08:03
  • var str = ''menu-item[0][offers][price]'; str.replace('menu-item[0]', 'menu-item[1]'); look at link! how is work replace method for string https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/String/replace – Hamik Hambardzumyan Sep 20 '17 at 08:06
  • [jquery-serialize-object](https://github.com/macek/jquery-serialize-object) seems to do what you're after (but unfortunately pulls jquery in as a dependency) – Kos Sep 20 '17 at 10:13

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