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Daniel Benisti
Front End Web Development Techdegree Graduate 22,224 Pointswhy using []
on minut 7:24 why he uses [user.name] ? i mean why the [] instead of plain user.name
2 Answers
Steven Parker
231,184 PointsThe entire expression is "usersObject[user.name]", so bracket notation is being used to access a specific property of the "usersObject". The value in user.name is the name of the property being created.
Jesus Mendoza
23,289 PointsWhen using variables to access elements inside an object you have to use [].
For example:
// Using plain property names
const obj = {
name: 'Jesús'
}
console.log(obj.name) // logs Jesús
// Using variables
const propertyName = 'name';
const obj2 = {
name: 'Jesús'
};
console.log(obj[propertyName]); // logs Jesús
Daniel Benisti
Front End Web Development Techdegree Graduate 22,224 PointsDaniel Benisti
Front End Web Development Techdegree Graduate 22,224 Pointsbut if i want to acces property in object with bracket notation i need to add a string with it , am i right? like this const peoples ={ name: dani, age: 22 } peoples["name"]
Steven Parker
231,184 PointsSteven Parker
231,184 PointsThat's right, but the string can be a literal (as in your example) or it can come from a variable (as what
user.nameholds).