When we want to bind a variable within an anonymous function unchanging value outside of the function, you can implement the following javascript code:
var funcs = [];
function createfunc(i) {
return function() { console.log("My value: " + i); };
}
for (var i = 0; i < 3; i++) {
funcs[i] = createfunc(i);
}
for (var j = 0; j < 3; j++) {
funcs[j](); // and now let's run each one to see
}
Since...
Showing posts with label closure. Show all posts
Showing posts with label closure. Show all posts
How does JavaScript closure works
Whenever you see the function keyword within another function, the inner function has access to variables in the outer function.
function foo(x) {
var tmp = 3;
function bar(y) {
alert(x + y + (++tmp)); // will alert 16
}
bar(10);
}
foo(2);
This will always alert 16, because bar can access the x which was defined as an argument to foo, and it can also access tmp from foo.
That...
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