js function call hacker

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js function call hacker

you don't know javascript function

https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Functions

https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Function

https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Functions

comma

(1, 2, 3, test) === (test) === test

https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/Comma_Operator

function test(a, b) {

   console.log(`a =`, a);

   console.log(`b =`, b);

}

(test)

ƒ test(a, b) {

   console.log(`a =`, a);

   console.log(`b =`, b);

}

(test)();

// a = undefined

// b = undefined

(test)(111, 222)

// a = 111

// b = 222

(1, test)(111, 222)

// a = 111

// b = 222

(1, 2, 3, test)(111, 222)

// a = 111

// b = 222

this

https://stackoverflow.com/questions/11541134/javascript-syntax-0-fnargs

var foo = {

  fullName: "Peter",

  sayName: function() {

    console.log("My name is", this.fullName);

  }

};

window.fullName = "Shiny";

foo.sayName();

// My name is Peter

(foo.sayName)();

// My name is Peter

(0, foo.sayName)();

// My name is Shiny

(0, function)(arg1, arg2, ...)

https://developer.mozilla.org/en-US/docs/Web/API/Console/log

console.log(obj1 [, obj2, ..., objN]);

console.log(msg [, subst1, ..., substN]);

(0,console.log)("hello world!")

// hello world!

function test(a, b) {

   console.log(`a =`, a);

   console.log(`b =`, b);

}

(test)(111, 222)

// a = 111

// b = 222

(0, test)(111, 222)

// a = 111

// b = 222

(1, test)(111, 222)

// a = 111

// b = 222

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