call和apply

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LYF edited this page Mar 14, 2017 · 1 revision

function fn1() {
    console.log(1);
}

function fn2() {
    console.log(2);
}

fn1.call(fn2);
fn1.call.call(fn2);
fn1.call.call.call.call.call(fn1);
Function.prototype.call.call(fn1);
Function.prototype.call(fn1);