Is your React component not rendering? React - uncaught TypeError: Cannot read property 'setState' of undefined 16 default values from initial state are loaded before store rehydrates with redux-persist To destructure the object into multiple properties, ... After destructuring the variable enemies is undefined because the property enemies doesn’t exist in the object hero. [BUG] Cannot destructure property `context` of 'undefined' or 'null , Issue Right after truffle debug txid I get: // compiling all contracts Cannot destructure property `body` of 'undefined' or 'null' (5.1.10 to any later Thanks for contributing an answer to Stack Overflow! Bug report Command (mark with an x) - [x ] build Is this a regression? This article takes a look at a couple of ways to make these errors go away. Fortunately, you can set a default value if the property doesn’t exist in the destructured object. Description ... React. These errors occur because the method you are using or invoking in your React Component is not bound correctly. By @dislick on Feb 12, 2016. TypeError: Cannot destructure property `activity` of 'undefined' or 'null'. I can’t tell you the number of times I’ve thrown errors in local development because a property on an object I was trying to access was undefined, meaning the property (and its value) didn’t exist on that object. The text was updated successfully, but these errors were encountered: 7 For example, to set title to be a const with value equal to the nested title property within the obj:. Why? Two such errors are “Cannot read property ‘setState’ of undefined” and “this.setState is not a function”. const obj = {main: {content: {title: 'old pier', description: 'a structure where once many people used to wander around leisurely. Best Practices ERROR UNHANDLED REJECTION Cannot destructure property `activity` of 'undefined' or 'null'. ... Uncaught TypeError: Cannot read property 'map' of undefined. Cannot match against 'undefined' or 'null'... It’s conceptually similar to accessing a property of an undefined object, just with a different exception type. Comunicación Social To destructure a nested property, we write it in a similar way to the shape of the object from which we are destructuring. JavaScript React Angular More. cannot destructure property of 'undefined' or 'null' 20 de enero, 2021 . How to Prevent Undefined Errors for Missing Properties: Default Values. Yes, the previous version in which this bug was not present was: 8.0.0. Is your React component not rendering? But at least this way it’ll be easier to debug. A failed propType check does not prevent the component from rendering, it only warns. Use destructuring in function parameters. I am getting some error saying Cannot destructure property 'name' of 'e.target' as it is undefined in the createform() method. Not as an empty string, nor as an empty array or even a 0.