luojiyin1987 · July 4, 2018 15:01
diff --git a/recurrence.js b/recurrence.js
 let syncFn = x => {
    console.log("x is " + x);
    if (x < 10) {
        syncFn(x + 1);
        console.log("x is " + x);
    }
 }
 console.log('=== start sync ===');
 syncFn(2);
 console.log('=== end sync ===');
	let syncFn = x => {
	console.log("x is " + x);
	if (x < 10) {
	syncFn(x + 1);
	console.log("x is " + x);
	}
	}
	console.log('=== start sync ===');
	syncFn(2);
	console.log('=== end sync ===');