Javascript declare variable in global scope shorthand
0
var object = name: "Murad";
(function(window)
var a = b = 10;
)(object)
Why I can access b variable in global scope?
var a = b = 10
is not same thing with?
window.b = 10;
var a = window.b;
javascript scope ecmascript-5
asked Nov 14 '18 at 11:45
Murad SofiyevMurad Sofiyev
346314
add a comment |
0
var object = name: "Murad";
(function(window)
var a = b = 10;
)(object)
Why I can access b variable in global scope?
var a = b = 10
is not same thing with?
window.b = 10;
var a = window.b;
javascript scope ecmascript-5
asked Nov 14 '18 at 11:45
Murad SofiyevMurad Sofiyev
346314
1
objecthas nothing to do with your question
– Ahmad
Nov 14 '18 at 11:47
Nope has. When U write window.b = 20 inside function b declare inside object
– Murad Sofiyev
Nov 14 '18 at 11:48
What are you trying to do exactly? Sincebis not in the current scope, it will be put on the outer scope (the globalwindowobject in the browser)
– Tommos
Nov 14 '18 at 11:48
try it with"use strict".
– Alnitak
Nov 14 '18 at 11:49
I know when declare variable without var its declare inside global scope but my question is declare variable without var its convert window.variableName yeah? And i change window object with a. I want do declare variable inside a
– Murad Sofiyev
Nov 14 '18 at 11:51
add a comment |
0
0
0
var object = name: "Murad";
(function(window)
var a = b = 10;
)(object)
Why I can access b variable in global scope?
var a = b = 10
is not same thing with?
window.b = 10;
var a = window.b;
javascript scope ecmascript-5
asked Nov 14 '18 at 11:45
Murad SofiyevMurad Sofiyev
346314
var object = name: "Murad";
(function(window)
var a = b = 10;
)(object)
Why I can access b variable in global scope?
var a = b = 10
is not same thing with?
window.b = 10;
var a = window.b;
javascript scope ecmascript-5
javascript scope ecmascript-5
asked Nov 14 '18 at 11:45
Murad SofiyevMurad Sofiyev
346314
asked Nov 14 '18 at 11:45
Murad SofiyevMurad Sofiyev
346314
asked Nov 14 '18 at 11:45
Murad SofiyevMurad Sofiyev
346314
asked Nov 14 '18 at 11:45
Murad SofiyevMurad Sofiyev
346314
asked Nov 14 '18 at 11:45
Murad SofiyevMurad Sofiyev
346314
346314
1
objecthas nothing to do with your question
– Ahmad
Nov 14 '18 at 11:47
Nope has. When U write window.b = 20 inside function b declare inside object
– Murad Sofiyev
Nov 14 '18 at 11:48
What are you trying to do exactly? Sincebis not in the current scope, it will be put on the outer scope (the globalwindowobject in the browser)
– Tommos
Nov 14 '18 at 11:48
try it with"use strict".
– Alnitak
Nov 14 '18 at 11:49
I know when declare variable without var its declare inside global scope but my question is declare variable without var its convert window.variableName yeah? And i change window object with a. I want do declare variable inside a
– Murad Sofiyev
Nov 14 '18 at 11:51
add a comment |
1
objecthas nothing to do with your question
– Ahmad
Nov 14 '18 at 11:47
Nope has. When U write window.b = 20 inside function b declare inside object
– Murad Sofiyev
Nov 14 '18 at 11:48
What are you trying to do exactly? Sincebis not in the current scope, it will be put on the outer scope (the globalwindowobject in the browser)
– Tommos
Nov 14 '18 at 11:48
try it with"use strict".
– Alnitak
Nov 14 '18 at 11:49
I know when declare variable without var its declare inside global scope but my question is declare variable without var its convert window.variableName yeah? And i change window object with a. I want do declare variable inside a
– Murad Sofiyev
Nov 14 '18 at 11:51
1
1
object has nothing to do with your question– Ahmad
Nov 14 '18 at 11:47
object has nothing to do with your question– Ahmad
Nov 14 '18 at 11:47
Nope has. When U write window.b = 20 inside function b declare inside object
– Murad Sofiyev
Nov 14 '18 at 11:48
Nope has. When U write window.b = 20 inside function b declare inside object
– Murad Sofiyev
Nov 14 '18 at 11:48
What are you trying to do exactly? Since
b is not in the current scope, it will be put on the outer scope (the global window object in the browser)– Tommos
Nov 14 '18 at 11:48
What are you trying to do exactly? Since
b is not in the current scope, it will be put on the outer scope (the global window object in the browser)– Tommos
Nov 14 '18 at 11:48
try it with
"use strict".– Alnitak
Nov 14 '18 at 11:49
try it with
"use strict".– Alnitak
Nov 14 '18 at 11:49
I know when declare variable without var its declare inside global scope but my question is declare variable without var its convert window.variableName yeah? And i change window object with a. I want do declare variable inside a
– Murad Sofiyev
Nov 14 '18 at 11:51
I know when declare variable without var its declare inside global scope but my question is declare variable without var its convert window.variableName yeah? And i change window object with a. I want do declare variable inside a
– Murad Sofiyev
Nov 14 '18 at 11:51
add a comment |
1 Answer
1
active
oldest
votes
2
You can access variable b because you give a variable name - b, but you do not declare it like var let or const. JS will see that a name is allocated for a variable and it will create the variable automatically in the global scope.
answered Nov 14 '18 at 11:48
squeekyDavesqueekyDave
479216
Yeah I know but when u declare variable without var its convert window.variableName yeah? And i change window object with a
– Murad Sofiyev
Nov 14 '18 at 11:50
2
no, it doesn't first convert it towindow.var, it will actually put it on the globalwindowobject. It doesn't matter if you have a differentwindowin your current scope
– Tommos
Nov 14 '18 at 11:53
add a comment |
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1 Answer
1
active
oldest
votes
1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
2
You can access variable b because you give a variable name - b, but you do not declare it like var let or const. JS will see that a name is allocated for a variable and it will create the variable automatically in the global scope.
answered Nov 14 '18 at 11:48
squeekyDavesqueekyDave
479216
Yeah I know but when u declare variable without var its convert window.variableName yeah? And i change window object with a
– Murad Sofiyev
Nov 14 '18 at 11:50
2
no, it doesn't first convert it towindow.var, it will actually put it on the globalwindowobject. It doesn't matter if you have a differentwindowin your current scope
– Tommos
Nov 14 '18 at 11:53
add a comment |
2
You can access variable b because you give a variable name - b, but you do not declare it like var let or const. JS will see that a name is allocated for a variable and it will create the variable automatically in the global scope.
answered Nov 14 '18 at 11:48
squeekyDavesqueekyDave
479216
Yeah I know but when u declare variable without var its convert window.variableName yeah? And i change window object with a
– Murad Sofiyev
Nov 14 '18 at 11:50
2
no, it doesn't first convert it towindow.var, it will actually put it on the globalwindowobject. It doesn't matter if you have a differentwindowin your current scope
– Tommos
Nov 14 '18 at 11:53
add a comment |
2
2
2
You can access variable b because you give a variable name - b, but you do not declare it like var let or const. JS will see that a name is allocated for a variable and it will create the variable automatically in the global scope.
answered Nov 14 '18 at 11:48
squeekyDavesqueekyDave
479216
You can access variable b because you give a variable name - b, but you do not declare it like var let or const. JS will see that a name is allocated for a variable and it will create the variable automatically in the global scope.
answered Nov 14 '18 at 11:48
squeekyDavesqueekyDave
479216
answered Nov 14 '18 at 11:48
squeekyDavesqueekyDave
479216
answered Nov 14 '18 at 11:48
squeekyDavesqueekyDave
479216
answered Nov 14 '18 at 11:48
squeekyDavesqueekyDave
479216
479216
Yeah I know but when u declare variable without var its convert window.variableName yeah? And i change window object with a
– Murad Sofiyev
Nov 14 '18 at 11:50
2
no, it doesn't first convert it towindow.var, it will actually put it on the globalwindowobject. It doesn't matter if you have a differentwindowin your current scope
– Tommos
Nov 14 '18 at 11:53
add a comment |
Yeah I know but when u declare variable without var its convert window.variableName yeah? And i change window object with a
– Murad Sofiyev
Nov 14 '18 at 11:50
2
no, it doesn't first convert it towindow.var, it will actually put it on the globalwindowobject. It doesn't matter if you have a differentwindowin your current scope
– Tommos
Nov 14 '18 at 11:53
Yeah I know but when u declare variable without var its convert window.variableName yeah? And i change window object with a
– Murad Sofiyev
Nov 14 '18 at 11:50
Yeah I know but when u declare variable without var its convert window.variableName yeah? And i change window object with a
– Murad Sofiyev
Nov 14 '18 at 11:50
2
2
no, it doesn't first convert it to
window.var, it will actually put it on the global window object. It doesn't matter if you have a different window in your current scope– Tommos
Nov 14 '18 at 11:53
no, it doesn't first convert it to
window.var, it will actually put it on the global window object. It doesn't matter if you have a different window in your current scope– Tommos
Nov 14 '18 at 11:53
add a comment |
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1
objecthas nothing to do with your question– Ahmad
Nov 14 '18 at 11:47
Nope has. When U write window.b = 20 inside function b declare inside object
– Murad Sofiyev
Nov 14 '18 at 11:48
What are you trying to do exactly? Since
bis not in the current scope, it will be put on the outer scope (the globalwindowobject in the browser)– Tommos
Nov 14 '18 at 11:48
try it with
"use strict".– Alnitak
Nov 14 '18 at 11:49
I know when declare variable without var its declare inside global scope but my question is declare variable without var its convert window.variableName yeah? And i change window object with a. I want do declare variable inside a
– Murad Sofiyev
Nov 14 '18 at 11:51