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JavaScript DOM Scripting By Example Improving the Application Code Refactor 1: Create List Items

MING-HSIEN CHEN
MING-HSIEN CHEN
11,852 Points
Posted by MING-HSIEN CHEN
MING-HSIEN CHEN
11,852 Points

why should I use bracket instead of using dot?

when we refactor the function createLi(text), I don't understand why should we use brackets property instead of using dot property

function createLi(text){ ... element[property] = text; //why can't we use element.property? }

1 Answer

Joseph Wasden
Joseph Wasden
20,406 Points

From a related post.

"You must use square brackets since you are using the string passed to the property parameter; if you use dot notation JS thinks you're looking for a property with the name property. When you put it in brackets, the property parameter gets evaluated to a string and the string is used to access the property."

https://teamtreehouse.com/community/why-do-we-need-to-use-bracket-syntax-when-calling-createelement