when is the closure generated? Is it when the function is defined or when it is executed?
= add =
from "JavaScript you don"t know". There is no free variable in the callback of click binding, so why is it a closure?
when is the closure generated? Is it when the function is defined or when it is executed?
= add =
from "JavaScript you don"t know". There is no free variable in the callback of click binding, so why is it a closure?
scope is generated when the function is defined, and references to variables in the outer scope produce closures
http://liximomo.github.io/jav...
closure, actually refers to the closure function, refers to a function using variables outside the scope of the function, the function is called the closure function. For example:
let name = 'test';
//
//
function say(){
// name
console.log(name);
}first of all, there is a front-end classic closure interview question. for(var i = 0;i<5;iPP){ setTimeout(()=>{ console.log(i) },1000*i) } Everyone knows that the answer to this question is to type 5 every second. then the interviewer a...
closure, which leads to memory leakage due to the fact that the internal variables of the parent function cannot be reclaimed by the recycling mechanism; problem, ...
function fn1(){ var a = 6; function fn2(){ alert(a) ; } return fn2; } var f = fn1(); f() alert 6 fn1() as in the above code, the variable f can be assigned to alert 6, but there is no response when calling fn1 directly. What is the...
function student () { var name = xxx ; var getName = function () { return name } var setName = function (newName) { name = newName; } return { getName: getName, setName: setName, name: na...