The JSON key has been labeled as "valid", making it difficult to access in JavaScript as demonstrated in a JSfiddle example

Initially, I transformed a Plist file (XML formatted) into JSON using an online tool. Extracting the important data from this extensive JSON file was not a challenge. Utilizing this crucial data, I am reconstructing a new JSON file that is concise and contains relevant information for a plugin I plan to develop in the future.

The conversion from plist to JSON results in some messy formatting. For instance, <true/> and <false/> get converted to JSON as "false":"", or "true":"",.

I am utilizing jQuery

For an example, refer to this JSfiddle: jsfiddle example

Or view it here:

// Simplified (not really a JSON file, but this will do it for explaining) 
var themeJSON = {
    "item": {
        "false": "",
    },
};

// Determining if it's enabled ("true") or disabled ("false")

// Function for checking if this is the default option
function checkDefault() {
    // "true" is a keyword!
    if (themeJSON.item.true) {
        return "1";
    // "false" is also a keyword!
    } else(themeJSON.item.false) {
        return "0";
    }
}

Perhaps I could use another function like find()?

Updated response: Thanks to the suggestions in the comments, here is my updated code:

function checkDefault() {
    if (item.hasOwnProperty("true")) {
        return "1";
    } else if(item.hasOwnProperty("false")) {
        return "0";
    }
}

Answer №1

Consider using the property name as a string:

if (themeJSON.item['true']) {
  return '1';
}
else if (themeJSON.item['false']) {
    return "0";
}

update — a helpful comment points out that while accessing properties by string value is effective, your code has other issues. If the properties are actually empty strings, then what you truly need is a way to verify if the property exists rather than just checking for the value of the property:

if (typeof themeJSON.item['true'] !== 'undefined') { ... }

or, alternatively:

if ('true' in themeJSON.item) { ... }

You could also explicitly check for equality against an empty string:

if (themeJSON.item['true'] === '') { ... }

Answer №2

When an attribute of an object is named after a reserved keyword, one can use the array index notation to access it.

An example of checking if element contains an attribute named null:

> data.element.hasOwnProperty("null");
true

This approach may not be optimal as an object could potentially have attributes named both false and true.

Answer №3

When working in JavaScript, the syntax foo.bar is essentially the same as foo['bar']. Therefore:

if (themeJSON.item['true'] === "")

It's important to use === because false == "" evaluates to true but false !== "" evaluates to false.

Another point to mention is that technically speaking, once themeJSON is no longer a JSON since it's not in string form - it becomes just another JavaScript object. It's crucial not to confuse the two.

Answer №4

Check out this code snippet

function verifyDefault() {
    // true is a reserved word!
    if ("true" in styleJSON.item) {
        return "1";
    // as well as false!
    } else if ("false" in themeJSON.item) {
        return "0";
    }
}

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