Scope & global variables using the window object

17. October 2014

There are many instances were you might like to define global variables, that can be used anywhere.

This does not work:

var my_variable = 1

$.getScript( "my_script.js", function() {
 alert(my_variable);
});

var my_variable = 1

$.getScript( "my_script.js", function() {

alert(my_variable);

});

This works:

window.my_variable = 1

$.getScript( "my_script.js", function() {
 alert(window.my_variable);
});

window.my_variable = 1

$.getScript( "my_script.js", function() {

alert(window.my_variable);

});

In case of the first $.geScript function(){…} the my_variable is only availble within the scope of the function. In the second the variable is assigned to the window object and can be used within.

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Alexander

I am a full-stack developer. My expertise include:

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