PA
var a = {
b: 5,
getB: () => {
return this.b
}
};
console.log(a.getB()) // undefined
var fn = a.getB;
console.log(fn.bind(a)()) // undefinedSize: a a a
PA
var a = {
b: 5,
getB: () => {
return this.b
}
};
console.log(a.getB()) // undefined
var fn = a.getB;
console.log(fn.bind(a)()) // undefinedEM
var a = {
b: 5,
getB: () => {
return this.b
}
};
console.log(a.getB()) // undefined
var fn = a.getB;
console.log(fn.bind(a)()) // undefinedD
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