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javascriptconcatenationdynamic-variableswindow-object
ThomasM1
ThomasM1

Reputation: 1

I’m having trouble creating dynamic variables with Window in JavaScript

I am trying to create dynamic variables using Window. The exact thing I want to do is working fine with eval. But as you may know, that’s not advised.

Some examples.

I may define some variables like this.

var word1 = The; 
var word2 = Number; 
var word3 = Is;
var number = 100;

Now I combine them.

var phrase = word1+word2+word3+number.

If I use the window keyword in front of the phrase variable, then it will work, provided it is at the beginning of the line of code. However, if I try to put window in front of a variable in the middle of a line of code, it doesn’t work. However, eval does work. Example below.

window[phrase]

That will work.

But if it’s something like this

window[newCombinedVariable] = document.querySelector(window[newCombinedVariable2])

That will not work.

However, this will work.

window[newCombinedVariable] = document.querySelector(eval(newCombinedVariable2))

So, window can take a combination of strings with dynamic variables and it works at the beginning, but not in the middle, such as after doc/query selector. But eval works fine that way when using the exact same combined variables.

Can someone suggest what I must do in order for window to give me the same results as eval?

Upvotes: 0

Views: 73

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