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karan Badhwar
Web Development Techdegree Graduate 18,135 PointsFor.... of
As, I read from the links from the Teacher's Note, What I understood is, The const highlight's scope gets over once the first loop is finished and then it's like a fresh assignment for the
const highlight
from the highlights Collection. Moreover, we only use the const if it's read only purpose
Is my understanding of the Usage of (const) in the for .. of loop is right?
1 Answer
Julie Branyan
Full Stack JavaScript Techdegree Graduate 16,337 PointsHi Karen -
Your understanding is correct. If you were to add a console.log(highlight), you would see that it loops through the li element 'make coffee' first, then updates the background color to 'cornsilk', then it loops through the next li highlight class and so on until its completes. 'highlight' represents each element in the highlights HTML collection.
The main benefit is to prevent someone from changing the assignment of the identifier in the loop body. It makes it read only. This stackoverflow article example link, the first answer has two code snippets that are worth running. It shows how if you want to change the assignment within a loop body by trimming the string, it wont allow you with const and will throw an error.
If its helpful, I would use console.log() to log out the different items and play with it. This helped me as I was working to understand it better. Hope this helps!