Can left-hand side of assignment be an expression in Javascript [duplicate]

Question

why it doesn't work.
And it shows the Error

invalid left-hand side in assignment expression

VueJs


for (let i = 1; i <= this.properties.length; i++) {

    this.product.properties + `.property${i}` = '';

}‍‍‍‍‍‍

data

data () {
  return {
     product: {
       properties:{}
     }
  }
}

you can't perform an operation (+) before the =, to access a property an object dynamically you should always write myObject[dynamicKeyString] — Simon Dehaut
– Simon Dehaut, Commented Oct 10, 2019 at 20:39

Taha Paksu · Accepted Answer · 2019-10-10 20:35:51Z

3

Try this:

this.product = {
  properties: {}
};

for (var i = 0, len = 10; i < len; i++) {
  this.product.properties["property" + i] = '';
}

console.log(this.product);

answered Oct 10, 2019 at 20:35

Taha Paksu

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Comments

Deepak · Accepted Answer · 2019-10-10 20:46:00Z

1

product.properties[property${i}] = ''

answered Oct 10, 2019 at 20:46

Deepak

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Comments

M. Twarog · Accepted Answer · 2019-10-10 20:39:49Z

0

v left-hand side                            v right-hand side
this.product.properties + `.property${i}` = '';

In Javascript, on left-hand side of assigment operator must be something to which you can assign a value e.g. variable or object property. In your case there is addition expression there which is not valid.

answered Oct 10, 2019 at 20:39

M. Twarog

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