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What is the global variable called 'name' in javascript? [duplicate]
(2 answers)
Using the variable "name" doesn't work with a JS object
(4 answers)
What is the difference between "let" and "var"?
(39 answers)
Closed 5 years ago.
since today I believe in ghosts.
Can someone explain the following JS behaviour with Chrome (Version 59.0.3071.115) or Firefox (54.0 (64-bit)) ?
Why?
var name = 10;
console.log(typeof name); // string
console.log(name); // "10"
Same with let works:
let name = 10;
console.log(typeof name); // number
console.log(name); // 10
What I believe is, that window.name is used and it transforms any input to string. But then, why is var name not a local variable and hides the global variable?
Thank you.
Related
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Access JavaScript property case-insensitively?
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"Variable" variables in JavaScript
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Closed 11 months ago.
I am trying to fetch value using below statement
var variable_2 = context.getVariable(variablefetch);
My requirement is to fetch this variable_1 irrespective of case.
For example if value of this variablefetch could be stored as
variablefetcH = typea
VAriablefetch = typea
VARIABLEFETCH = typea ....etc
So irrecpective of what i pass (in above case variablefetcH,VAriablefetch,VARIABLEFETCH) it shoule be able to fetch value tyea
This question already has answers here:
How JS hoisting works within functions?
(4 answers)
Why a variable defined global is undefined? [duplicate]
(3 answers)
Closed last year.
My first guess is that the following code has the output of 10 and 100. However, after running the code I get undefined and 100 and I don't understand why the function doesn't see the first declaration of x..
var x = 10;
function f() {
console.log(x);
var x = 100;
console.log(x);
}
f();
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Javascript - Getting and setting properties on primitives implicitly creates object wrappers
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How is almost everything in Javascript an object?
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adding properties to primitive data types other than Array
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I am new to JS, and JS syntax is definitely confusing to me as I'm used to other languages instead.
const x = 5;
x.yy = 3;
console.log(x.yy); // undefined
How is x.yy = 3; a valid syntax?
and why is x.yy undefined when x.yy =3; took in place?
This question already has answers here:
"Variable" variables in JavaScript
(9 answers)
Closed 1 year ago.
let varone = "vartwo";
let vartwo = "answer";
And I would like to get "answer". But I cannot do the following:
console.log(vartwo);
How can I get "answer", but not by including "vartwo" in my code?
I think one way to resolve it, is by using javascript objects, as shown:
obj={
varone:"vartwo",
vartwo:"answer"
};
console.log(obj[varone]) //outputs "answer"
This question already has answers here:
JavaScript object: access variable property by name as string [duplicate]
(3 answers)
Closed 9 years ago.
I need help, how to insert variable n as XX. Variable n is number, for example 3 and I need to get this number to document.form1.any3.value; is it possible? Thanks for advice
function pokus(n){
var any1 = document.form1.anyXX.value;
}
Use square bracket notation:
function pokus(n){
var any1 = document.form1['any'+n].value;
}