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57 lines (41 loc) 路 760 Bytes
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// what is output?
const foo = () => {
let a = b = 10;
a++;
return a
}
foo();
console.log(a);
console.log(b);
// output
function createIncrement() {
let count = 0;
function increment() {
count++;
}
let message = `Count is ${count}`;
function log() {
console.log(message);
}
return [increment, log];
}
const [increment, log] = createIncrement();
increment();
increment();
increment();
log();
// Console sequence output?
function run () {
const promise = new Promise((resolve) => {
resolve('promise');
})
setTimeout(() => {
console.log('setTimeout');
});
promise.then(res => console.log(res))
console.log('log');
}
run();
// How does the Javascript interprets the following code?
console.log(x);
var x = 100;