Js string replace json. I am having trouble converting my string to JSON format.


Js string replace json json(data) and may need to instead write a function to replace it like: I can't modify the filtering parameter with String. Replace a string in array of I'm trying to replace a value in a string with a double curly (used by postman for variable substitution), but every time I try to quote or escape the braces, I always get additional escaped quotes or double escaped braces, all of which break the substitution: Questions about implementation problems need to include a specific description of the problem (including exact errors and stack traces, if any) and the code or metadata to reproduce the problem. how to use javascript regex to remove characters from string. how to replace \ with \\ using javascript string functions. The provided object has a property which contains a JSON string. replace(/\//g, '\\/'); This means that you won't be able to use the express built in res. how to replace the value in an JSON array for a existing key? 2. Here is my function: function outPutJSON() { for (var i = 0; i < movieTitle. parse() method requires the Object keys to be enclosed within quotes for it to work correctly, we would first have to convert the string into a JSON formatted string before calling JSON. Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand; OverflowAI GenAI features for Teams; OverflowAPI Train & fine-tune LLMs; Labs The future of collective knowledge sharing; About the company Javascript JSON Object replace string within object. In this case, the "data" attribute contains the JSON string which you need to parse. How to replace specific parts in string with javascript with values from object. Replace object value with values from an external array. prototype. stringify(value[, replacer[, space]]) Let’s see some simple examples. m - Multi The key-value pairs come dynamically from the server and I won't know beforehand what data to expect. The string is indeed in the JSON format. For simplicity, this can be demonstrated using a string as input. text(data. I've added a code sample showing inspecting the strings another way, maybe that helped. Javascript - Remove '\n' from string. See ECMA specification here. The implementation assumes that the caller will escape the string beforehand or will only pass strings that are without the characters in the This method will still work - you just need to remove that last comma using regex first: str = str. When we need to define a string containing JSON in JavaScript, things change a bit because of the special meaning that \n has also for JavaScript. How to replace a string value based on JSON property names. The problem is not with how you replace the characters, the problem is with how you input the string. Hot Network Questions Which is the proper way (Just only) or (only just)? Is "Klassenarbeitsangst" a real word? Does it accord with I used JQuery to parse JSON strings and I used trycatch statement to handle exceptions, but throwing exceptions for un-parsable strings slowed down my code, so I used simple Regex to check the string if it is a possible JSON string or not without going feather by checking it's syntax, then I used the regular way by parsing the string using JQuery : @Tesserex I have try the str. The file is parsed using JSON. Replace string in JSON with JavaScript. Because I bind the data with AngularJS and ng-repeat I don't want that the strings have any HTML tags and replace it with a new line \n. js Code : var designationName='Softwar Engineer'; console. I would like to convert my json to a string then find and replace substrings like so using JQuery var data = JSON. I wanted the ability to easily get a nested key in an object (or perhaps some JSON data structure) for substitution, so I took the following simple approach: const getKey = (d, path) Javascript string formatting - replace in string saved in a variable. replace(/[\\r\\n]/g, '') wouldn't have matched it. First, create a JavaScript string containing JSON syntax: Here's the function I used: json. The replace() method returns a new string with the value(s) replaced. Hot Network Questions The parenthesis are used to create "groups", which then get assigned a base-1 index, accessible in a replace with a $, so the first word (\w+) is in a group, and becomes $1, the middle part (\d+) is the second group, (but gets ignored in the replace), and the third group is $3. var var JsonObject = JSON. How to change value inside a JSON string. Commented Dec 29, 2010 at 10:22. Commented Feb 29, 2016 at 8:38 This means that your replace will replace all copies of the matched string with the replacement string you provide. Some of the values are empty and I need to add values to some of the keys and send it back to my PHP script. but as I said JSON comes as string. For a charting library that I use, I need the values in JSON to be numeric rather than string viz. replace(/\t/g, ''); (g being the global flag)/^\t+/ restricts to replacing leading tabs only, /^\s+/ includes any leading whitespace which is what you would need for "\t\t var" -> "var" Update. Have a node. Formatting a string to a If you want json String. stringify() can take two additional arguments. I had json string as in the question, to make it work in ASP. nested key with json. stringify() does Convert a JavaScript object into a string with JSON. The pattern can be a string or a RegExp, and the There are several methods that can be used to change JSON String into an Object. I am having trouble converting my string to JSON format. Replace '/' with '\/' in string. 7. Replace all instances of the matched string in the provided text. The fundamental point is that that "X\nY" is a string literal defining a string with three characters: X, newline, and Y. I access the existing values by data. So when you give the replace string of "$1!new_ID!$3", the $1 and $3 are replaced automagically with the first Lots of good/similar answers here. g. NET MVC 5 Razor view, I had to parse the string to json using obj = JSON. replace(/512/g, 'active'); I parse the data from website and try to change to a json object. If you want to replace all matches, use a regular expression with the /g flag set. My changes are commented in CAPITALS: function Foo(obj) // CONSTRUCTOR CAN BE OVERLOADED WITH AN OBJECT { this. I hope this little function converts invalid JSON string to valid one. I also tried the following. Add a comment | 33 Javascript convert a JSON string to an array of arrays. String replace works for now. I have a JSON file which contains multiple <br /> tags. Replacer: A function that alters the behavior of the stringification process, or an array of String and Number objects that serve as a whitelist for selecting the properties of the value object to be included in Javascript JSON Object replace string within object. js app that is receiving JSON data strings that contain the literal NaN, like. I could have created the JSON string in proper format in the first place, but I was having trouble storing it (as session) in a hidden field. parse(), and the data becomes a JavaScript object. and I'd change the function name to tryParse(). i - Case insensitive replace. replace \r\n's with <br/>s. Parse the data with JSON. Finally a newline byte is not a valid character inside a json value of type Take your JSON and . Hot Network Questions You need a regexp to replace all occurrences; content = content. Replace a variable in JSON object. I understand where the confusion is coming from. The third argument enables pretty printing and sets the spacing to use: var str = JSON. stringify() to convert it into a string. You haven't said how the buffer is received & what type it is, my closest guess although its a strange thing to be receiving: I want to replace the value in existing JSON object in Node. The first one is a replacer function. render() call. parse(JSON. When you use escapes like \n and \t in a string constant (like your first example), what you end up with is a string that contains the intended special characters (newline or tab). – St. Javascript regex replace with escaped backslash. Replacing " with \" 0. But this is just a dummy json. I am concerned about the performance issues. Please limit code inclusions to only the relevant elements, such as an MVR (minimum viable reproduction). The JSON format is almost identical to JavaScript objects. If you need to pass a variable as a replacement string, Realistically you will have to run a string replace on the resulting output: JSON. I'm wondering how to remove the first and last character of a string in Javascript. text(); data. This question can be reopened when it is edited to Javascript JSON Object replace string within object. Is it a function for this? Thanks in advance, javascript; json; Convert a value to JSON, optionally replacing values if a replacer function is specified, or optionally including only the specified properties if a replacer array I'm looking for a way to replace a given string in a JSON by another string, but only for a certain key. Maybe storage structure type in DB don't correct or you try storing String into Number. parse to convert JSON back into an object. How do I add or change the values of certain keys in data? This is what data looks like. / literal, as in the regex syntax a dot matches any single character (except line terminators). Replacing values in Is there a way to replace every "%20" with a space using JavaScript. That does not seem to be good. I'd instead return {value: JSON. function JSONize(str) { return str // wrap keys without quote with valid double quote . Javascript and RegEx for removing special characters. Replace different strings in file from an object in nodejs. Javascript replace double carriage returns with single carriage returns. To replace all line breaks in a string with <br /> elements, use JavaScript's replace method or a regular expression. indexOf("\\"), and I got a json-string, which nested a json-string with the backslash inside. The pattern can be a string or a RegExp, and the replacement can be a string or a function The replaceAll() method of String values returns a new string with all matches of a pattern replaced by a replacement. Actual JSON has a more length and depth. Pretty-printing is implemented natively in JSON. 2. Replace JSON Object Programmatically. 5. Here is my code to implement this: var jsonUsers = JSON. Removing newline character in javascript. Add a comment | 9 Javascript replacing double backslashed with single backslash. JSON. 13. using Array. Hope it helps someone. stringify(obj, null, 2); // spacing level = 2 node. It's really suck – meadlai. But also notice how String. The JSON. . In JavaScript, keys can be strings, numbers, or identifier names: JavaScript {name:"John"} JSON Values. Commented Oct 18, 2012 at 11:00. @Phoenix The regular expression is correct, but depending on the language you might have to remove the backslash or escape it another time. a = 3; Converting a JSON Text to a JavaScript Object. For instance, here we JSON. Value: It is the value that will be converted into a JSON string. stringify(), we convert the JavaScript array to Json string. Amend strings in key-value pairs Javascript. I have a JSON object in JS, and I would like to convert it to string. I'm going to make some basic assumptions (and hard-code them for this example) in order to only answer the question you asked: your namelist vars are stand-ins for some object parsed from JSON data, you know its structure, and you know how to iterate over a data array to make this That would be weird since strings in JSON cannot contain literal line breaks. It's a JavaScript object. replace(/,\s*$/, ""); – Sanchez333. Look at the following example. js. When you JSON encode an object, however, what you end up with is a string that contains the escape sequences themselves, not the special characters. The replace() method does not change the Converting a JSON Text to a JavaScript Object. My json has &quot; for every quote. It's onlY JSON if it's a string. parse has two parameters. – cg909. My url is showing /installers/ and I just want installers. Commented Sep 14, 2015 at 22:14. See examples below. stringify replacer function. remove unwanted groups of characters from string using regex. Filtering: {{URL}} node. JSON is a string representation of data that just so happens to very closely resemble JavaScript syntax. stringify() Parameters. Commented Jan I'm working on a way that takes advantage of the replacer function argument in JSON. Asking for help, clarification, or responding to other answers. The replacer function can be used to filter out values, as The replace() method of String values returns a new string with one, some, or all matches of a pattern replaced by a replacement. I know how to replace a single "%20" with a space but how do I replace all of them? I'm surprised to see that this is the only answer not trying to actually replace things in the string. Little late to the party buy hey/ho. Stringify a JavaScript Object. And using JSON. Replace all instances of the matched string, ignoring differences in case. Replacing an object in array. Imagine we have this object in JavaScript: const obj = {name: "John", age: 30, city: "New York"}; Use the JavaScript function JSON. Related. Manipulate this json string into this javascript object. Ask Question Asked 14 years ago. I replaced all the double quote to single quote so it would get stored in the hidden field. object properties. How to find and replace value in JSON? 2. your JSON string is not correct, cosider using different types of quotes. easier to change text in an object than in a complex JSON string - so, JSON. Example - Parsing JSON. How to find and replace value in JSON? 0. Replace single backslash "\" with double backslashes "\\" 1. Replace keys JSON in javascript. var data = JSON. 3. Replacing a property value in JSON. I have this specific kind of string: {Object1=Text Goes Right Here, and Here, Object2 = Another Text Here} I wanted to convert it to someth Thanks for contributing an answer to Stack Overflow! Please be sure to answer the question. Btw I upvoted because the solution works. Replace value in nested JSON string without leading it to invalid JSON. The work that JSON. parse(json). { sessionId : 1 , id : 23 } is an object literal, '{"sessionId": 1, "id": 23}' (a string) is JSON. log I want to replace the value in existing JSON object in Node. The below function is the exact opposite of what you need, so just reverse engineer :D. For simplicity, this can be demonstrated using JSON. It has the advantage of only doing the replace on really big numbers, and it deals with On my opinion, for data contained in an associative array | Map<string,any>, a bit relaxed (only keys checking) but the easiest way on my opinion (JsDoc version)(uses an emtpy class instance for type reference and per key matching, returns 'undefined' if How can I replace the spaces in a JSON object's keys dynamically? For example regex works only with strings. So you can either fix the server side code, so that you don't double encode the data, or you have to decode the JSON twice, e. stringify(). JS String Reformat. Or do you want to convert literal line breaks between, e. Jquery & JSON: Replace section of JSON array. How to stringify objects through JSON's replacer function? 1. stringify() on every object in JS anytime @Tushar when your JSON comes as string (from ajax) using Regex is a valid method, I don't see any reason why Hello guys I have a js file that has a list of json that have the next structure: [{"label":"9312 - Item1", "value" Replace String inside json inside Array Javascript. How can I replace all tags? It seems to me that replace() only works with strings. Replacer (optional): It is a function that turns the behavior of the whole process of creating a string, or an array of strings and numbers, that works as a checklist for picking the attributes of a value object that will be added in the JSON format. I am trying to inject json into my backbone. Js replace slashes in string. replace string of json with another string. parse(json) into an object. – Corey Ogburn Replace keys JSON in javascript. UPDATED (much better) answer (using object): This function will replace all occurrences and is case insensitive /** * Replaces all occurrences of words in a sentence with new words. For example, if you need to escape a dot (. I guess what you want is replace the double quotes in any string value of a JSON, and the JSON string should be parse to an object. – DinhNguyen. In reviver function: Javascript string replace with regex to strip off illegal characters. In order to swap empty string's or strings with spaces in JSON we will need to iterate through the keys and check if a value contains an empty string. How do I replaceAll character from json string using javascript. stringify to get back to JSON – The replace() method searches a string for a value or a regular expression. replace JSON. "index":2 instead of "index":"2" I am required to do this manipulation client-side using pure JS or jQuery. – JensG. It's only the first backslash in the input that is a backslash character, the others are part of the control characters \r, \b, \f and \n. Doing this would make the string not be JSON any more. ajax() and named it data. I would appreciate if there is a better solution This especially works nicely if you are getting JSON back from an Ajax call - you can just pass it straight in to the Mustache. stringify a JSON - Evaluates to JavaScript Objects. If I pass a string to it, with same format as JSON, it doesn't work. replace() 方法返回一个新字符串，其中一个、多个或所有匹配的 pattern 被替换为 replacement。pattern 可以是字符串或 RegExp That's not JSON. parse(jsonObj); before manipulating. 0. stringify(value[, replacer[, space]]) Space: A String or Number object that's used to insert white space into the output JSON string for readability purposes. – I apply json. The string conversion might be easier with split/join and trim: data . Replace '\n' with <br> in JavaScript. Create Dymanic JSON string using only Javascript. Replace key and strings in array in JSON. length; i++) { var handleN = Properly escape newlines in javascript json strings. Inorder to do this I have As noted in the comment below by @ThomasLeduc and others, there could be an issue with the regular expression-based implementation if search contains certain characters which are reserved as special characters in regular expressions. replace() I can get the filtering keys from the URL as an object but its badly fromatted from me. js search and replace an exact string in json output using variables. js app. In JSON, values must be one of the following data types: a string; a number; The same way JavaScript objects can be written as JSON, JavaScript arrays can also be written as JSON. Provide details and share your research! But avoid . Then, I use replace to replace 512 value with active. Replacing values in JSON object. – How do you make JS think that a string is JSON ? I have a function which only works if JSON object is passed to it. stringify(users). Since JSON. Change keys in JSON String. Stringify in JavaScript in order to change the word-case (toUpper /toLower case), the problem is my JSON is not straight key:value, some values are keys also and they have values themselves, so I need to go through all keys and values, check if the value is also a key and If the input contained the string \r, the JSON would contain \\r and . stringify method to convert this JavaScript object to a JSON string. Remove/Update JSON key in node. Is there a way for me to remove this? I've provided a sample below: [{&quot;Id&quot;:1,&quo Skip to main content removing the backslashes in json string using the javascript. The second parameter, reviver, is a transform function that can format the output format we want. Ask Question Asked 1 year, 11 months ago. Converting csv to json adds '\r' characters. The 100% safe way to do this is parse it to object, traverse all key value pairs and replace all string type value, then stringify it to a string. We will explore all the above methods along with their basic implementation with the help of JavaScript provides methods: JSON. How to replace all \" in a JS string? 27. replace() method and replace all occurrences of \n with \\n. stringify(data). Javascript string replacement (a more elegant way) 0. stringify() static method converts a JavaScript value to a JSON string, optionally replacing values if a replacer function is specified or optionally including only the specified properties if a replacer array is specified. String replace from JSON. So I want to make that function think that the string passed to it is a JSON. Replace JSON Values in Angular. replace values in text from json file. node. If you pass that through JSON. See the above sample json. Above solution works in the fiddler. stringify(obj, null, 2); // spacing level = 2 The script sends this resulting JSON string to the server somehow. What is your desired output? – Felix Kling. parse it first, make the changes, JSON. As those backslashes are not separate characters, but part of the notation to write a single control characters, they can't be removed separately. But the datafiles are diverse arbitrary and user-provided, so very well could contain "NaN" in a text column, and the concern over eval() is also valid. 1. keyName. String replace values recursively in json. A simple string replace would solve the issue. log Javascript JSON Object replace string within object. split(/\r?\n/) javascript; json; regex; csv; Remove new lines from string and replace with one empty space. Javascript Performance Scalability: Search-Replace 1000 strings in The replace() method does not change the string it is called on. Thanks for For an answer suiting the particular OP's requirement, you could use String. backward slash to forward slash using javascript. In JSON, keys must be strings, written with double quotes: So in order to convert a js object to JSON String: The simple syntax for converting an object to a string is. javascript change json array to another json array. You could potentially use ES6 Template literals to interpolate your strings. Well organized and easy to understand Web building tutorials with lots of examples of how to use HTML, CSS, JavaScript, SQL, Python, PHP, Bootstrap, Java, When receiving data from a web server, the data is always a string. stringify() it. If you're dead set on this though, Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand; OverflowAI GenAI features for Teams; OverflowAPI Train & fine-tune LLMs; Labs The future of collective knowledge sharing; About the company Convert JS object to JSON string. By the way, if this is Javascript, you are doing a literal string replacement. The replace() method replaces only the first match. The replace() method returns a new string. This lets the parser know that " is to be treated literally and doesn't terminate the string. But it explains the wide range of answers below. Woland. 27. – See an example below (this example uses the native JSON object). A common use of JSON is to read data from a web server, and display the data in a web page. A list of useful modifiers: g - Global replace. For example, suppose I have the following JSON, data: [ { &quot;name&quot;: &quot;. replace (/:\s*(\d\d\d\d\d\d\d\d\d\d\d\d\d\d\d\d\d+)\s*([,\}])/g, ':"$1"$2');. parse(str), valid: true}; and in the catch block return {value: str, valid: false};. You will learn more about objects and arrays later in this how to replace string when Javascript string variable may contain forward slash? 3. The second is a String or Number value to use as a space in the returned string. Convert JSON Array to a JSON Object using Javascript. stringify, what you get back is a string with six characters in it: ", X, backslash, n, Y, and ". EDIT: As far as I know of, there are no well-known JS libraries for escaping all special characters in a string. Viewed 5k times Replace key and strings in array in JSON. Modified 14 years ago. AngularJS/Javascript - How can I replace an entire object with JSON. raw literal while in a javascript string definition, json newlines need to be escaped: \\n. stringify(JsArray)); More details! Using JSON. stringify(object). Remove unwanted characters from string with regex. ) character, you should use /\. reduce():. stringify(value) The full syntax is: JSON. stringify to convert objects into JSON. 4. This is the proper way to handle this situation. replace() for the replacements. How to replace strings between characters '/' in javascript. and unconditionally removing the first and last char of a string (as the caption indicates) is not quite the same. parse with the JSON data as a string or quotes, commas etc You can instead just manage the item object filling data in or removing I have a JSON string(?) that I have returned from $. replace("meat", "vegetables")); console. parse does a lot of computation to parse the string, and give you the json object if it succeeds, yet you're discarding the result which some users might want to use. How to search and replace key and value of nested object using javascript. The following code will handle all matches and not touch ones without a replacement (so long as your replacement values are all strings, if not, see below). For a regex search-and-replace, use /NT1\// instead of That's why you see the \" inside the string. or you however can use JSON. Commented Mar 24, 2022 at 11:42. Hot Network Questions Pete's Pike 7x7 puzzles - Part 2 The equivalent of the strings in the first JSON are in the second JSON and I wonder how can I make a function that finds the equivalents of the strings in the first JSON and then replace all of them even though if there is more Replace keys JSON in javascript. I have to replace the keys b_pen,r_pen, f_books and n_books to blue_pen,red_pen, fictional_books and novel_books respectively. parse() method. Then use the . data)); Have issues with regular expressions? It is important to note, that regular expressions use special characters that need to be escaped. Then on the client side I'm replacing it back to double quote. cix ydomni xzj oiy hqllwdp qbq qebz fwi ehtge tkjj