How to Fix "Functions are not valid as React child" Errors

Learn what is the root cause, and how to fix "Functions are not valid as React child" errors in your React app.

Ferenc Almasi • 2022 July 25 • 📖 2 min read

How to Fix "JSX element must be wrapped in enclosing tag"

Learn what is the root cause and how to fix "Adjacent JSX elements must be wrapped in an enclosing tag" errors in your React app.

Ferenc Almasi • 2022 July 25 • 📖 3 min read

How to Fix " Received false for non-boolean attribute" Errors

Learn what is the root cause, and how to fix "Warning: Received false for a non-boolean attribute className." warnings in React.

Ferenc Almasi • 2022 July 25 • 📖 1 min read

How to Fix "Each child should have a unique key prop"

Learn what is the root cause, and how to fix "Warning: Each child in a list should have a unique "key" prop." warnings in your React app.

Ferenc Almasi • 2022 July 22 • 📖 2 min read

How to Send Query Params in GET and POST in JavaScript

Learn how you can send query parameters in your GET and POST in JavaScript, and how to create helper functions for reusing them.

Ferenc Almasi • 2022 July 21 • 📖 4 min read

How to Create Associative Arrays in JavaScript

Learn what are associative arrays, and how they can be created and used in JavaScript in place of regular arrays.

Ferenc Almasi • 2022 July 20 • 📖 2 min read

How to Fix "Maximum call stack size exceeded" Errors in JS

Learn what is the root cause and how you can fix "Uncaught RangeError: Maximum call stack size exceeded" errors in JavaScript.

Ferenc Almasi • 2022 July 17 • 📖 2 min read

How to Fix "Nothing to repeat" Errors in JavaScript

Learn what is the root cause and how you can fix "Uncaught SyntaxError: Nothing to repeat" errors in JavaScript.

Ferenc Almasi • 2022 July 16 • 📖 2 min read

How to Fix "cannot set properties of null" Errors in JS

Lear what is the root cause and how you can fix "Uncaught TypeError: Cannot set properties of null (setting 'value')" errors in JavaScript.

Ferenc Almasi • 2022 July 14 • 📖 3 min read

How to Fix "Illegal return statement" Errors in JavaScript

Learn what is the root cause of and how to fix "Uncaught SyntaxError: Illegal return statement" errors in your JavaScript code.

Ferenc Almasi • 2022 July 12 • 📖 3 min read

How to Fix "illegal character u+" Errors in JavaScript

Learn what is the cause, and how you can fix "Uncaught Syntaxerror: illegal character u+" errors in JavaScript.

Ferenc Almasi • 2022 July 12 • 📖 2 min read

How to Fix Uncaught URIError: URI malformed Errors in JS

Learn what is the root cause, and how can you fix "Uncaught URIError: URI malformed" errors in your JavaScript code.

Ferenc Almasi • 2022 July 11 • 📖 2 min read

Fix "cannot read properties of undefined (reading map)" in JS

Learn what is the cause, and how you can fix "Uncaught TypeError: Cannot read properties of undefined (reading 'map')" errors in JavaScript.

Ferenc Almasi • 2022 July 11 • 📖 2 min read

Fixing "Delete of an unqualified identifier" Errors in JS

Learn how to easily fix "Uncaught SyntaxError: Delete of an unqualified identifier in strict mode." errors in JavaScript.

Ferenc Almasi • 2022 July 11 • 📖 2 min read

How to Fix "$ is not defined" Errors in JavaScript

Learn what causes "Uncaught ReferenceError: $ is not defined" errors in JavaScript, and how you can fix them in various ways.

Ferenc Almasi • 2022 July 10 • 📖 3 min read

How to Fix "Unexpected token o in JSON at position 1"

Learn how you can fix uncaught syntaxerror unexpected token o in json at position 1 errors in JavaScript, and what is the root cause of this error.

Ferenc Almasi • 2022 July 09 • 📖 3 min read