Dan Cranney
Tips and Tricks for Working with JSON
#1about 1 minute
Safely parse JSON and handle potential errors
Use a try-catch block around JSON.parse to gracefully handle invalid JSON and prevent application crashes.
#2about 1 minute
Create a helper function to validate JSON strings
Build a simple helper function that uses a try-catch block to return true or false, indicating if a string is valid JSON.
#3about 1 minute
Improve JSON readability with pretty printing
Use the third parameter of JSON.stringify to specify the number of spaces for indentation, making the output human-readable.
#4about 1 minute
Selectively exclude fields using a replacer function
Pass a function as the second argument to JSON.stringify to filter out sensitive or unnecessary fields by returning undefined for specific keys.
#5about 1 minute
Transform data during parsing with a reviver
Use the second parameter of JSON.parse as a reviver function to transform values, such as converting date strings into Date objects, during the parsing process.
#6about 1 minute
Create a deep clone of a JSON object
Perform a deep clone by serializing an object with JSON.stringify and then immediately deserializing it with JSON.parse to create a new, independent copy.
#7about 1 minute
Convert a JSON object to a URL query string
Create a function that iterates over an object's keys, URI-encodes the keys and values, and joins them with ampersands to form a valid query string.
#8about 1 minute
Dynamically create a JSON object from arrays
Generate a JSON object by programmatically combining an array of keys with a corresponding array of values using a loop.
#9about 1 minute
Merge multiple JSON objects into a single object
Combine two or more objects into one using the spread operator, where properties from later objects will overwrite those from earlier ones.
#10about 1 minute
Extract and flatten data from complex JSON
Use the flatMap method to efficiently iterate over an array of objects and extract nested array data into a single, flattened array.
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