笔记

前言JavaScript高级程序设计杂记 label语句1.81234567891011let num = 0;outPoint:for (let i = 0 ; i < 10 ; i++){ for (let j = 0 ; j < 10 ; j++){ if( i == 5 && j == 5 ){ break outPoint; } num++; }}console.log(num); // 55 with语句1.81234567891011const obj = { a: 1, b: 2},b = 20;c = 3;with(obj){ console.log(a); // 1 console.log(b); // 20 console.log(c); // 3} instanceof1.81234const obj = {};console.log(obj...