Cannot read properties of undefined (reading ‘params’)

The error message “Cannot read properties of undefined (reading ‘params’)” occurs when trying to access a property called ‘params’ on an undefined object or variable.

To provide a detailed explanation, let’s consider an example. Suppose you have a JavaScript function that accepts an object as a parameter and tries to access its ‘params’ property:

    
      function processObject(obj) {
        console.log(obj.params);
      }
      
      let myObject;
      processObject(myObject);
    
  

In the example above, the ‘processObject’ function expects an object as a parameter. However, when calling the function with ‘myObject’ as an argument, which is undefined, an error will occur. This error is because the ‘params’ property cannot be read since the object is undefined.

To fix this issue, ensure that the object being passed to the function is defined and has the ‘params’ property. For instance, initialize ‘myObject’ with some properties before calling the ‘processObject’ function:

    
      let myObject = { params: 'example' };
      processObject(myObject);
    
  

In this revised example, ‘myObject’ is defined and has a ‘params’ property. Therefore, when calling the ‘processObject’ function, it will successfully access and log the value of ‘params’ to the console.

Make sure to analyze your code and verify that the object being accessed has been properly defined before attempting to access its properties to avoid encountering this error.