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How to replace or target in a string in javascript?

I have such strings which are received from a .pck file:

'{"aaa":"sssbbb"}'
'{"aaa":"ssscde"}'

I need to delete everything after the backslash (including the backslash) till the first ", respectively till the end of current value. So, I expect this result for both of those strings:

'{"aaa":"sss"}'
'{"aaa":"sss"}'

I can’t really parse this and can’t really string replace the backslash with anything else. I have tried to get the index of the backslash using str.indexOf("\");, but got -1. I have tried lots of regex expressions, but did not work. I have tried to replace str.replace(String.charCodeAt(92)), but did not work either.

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2

Answers


  1. 0

    You can use a regular expression to match the portion of the string you want to remove.

    Example:
    #original string

    let str = ‘{"aaa":"sssbbb"}’;

    // Regular expression to match the backslash and everything after it

    let updatedStr = str.replace(/[^",]*/g, ”);

    // Output the updated string

    console.log(updatedStr);

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  2. 0

    You can pass a reviver function to correct the values upon parsing.

    const reviverFn = (key, value) => {
  if (typeof value !== 'string') return value;
  return value.split('\')[0];
};

const parseJSON = (jsonStr) => JSON.parse(
  jsonStr.replace(/\/g, '\\'), // Need to double-up for valid JSON
  reviverFn);                     // Use the reviver function

const parsed = parseJSON('{"aaa":"sss\bbb"}');

console.log('Parsed:', parsed); // { aaa: "sss" }

console.log('Serialized', JSON.stringify(parsed));
    .as-console-wrapper { top: 0; max-height: 100% !important; }
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