Cannot read properties of undefined (reading ‘isstream’)

by

“`html

This error occurs when you are trying to access a property of an undefined or null object.
The error message “cannot read properties of undefined (reading ‘isstream’)” suggests that you are trying to access the ‘isstream’ property on an undefined object.

To fix this error, you need to ensure that the object is defined before accessing its properties.
You can do this by checking if the object is undefined or null before accessing its properties.

Example:

    
      // Incorrect code that may throw the error
      let obj;
      if (obj.isstream) {
        // Accessing 'isstream' property of undefined 'obj' will throw the error
        console.log(obj.isstream);
      }

      // Correct code that handles the error
      let obj;
      if (obj && obj.isstream) {
        // Checking if 'obj' is defined and accessing 'isstream' property
        console.log(obj.isstream);
      }

“`

Explanation:
– The content above explains that the error “cannot read properties of undefined (reading ‘isstream’)” occurs when you try to access a property of an undefined object.
– It suggests checking if the object is undefined or null before accessing its properties to avoid the error.
– The provided example demonstrates both the incorrect code that may throw the error and the correct code that handles the error by checking the object’s existence before accessing its property.

Related Post

Leave a comment