var a,b,c;(function(){ eval('var b = 2'); (1, eval)('var c = 3'); (new Function('var a = 4'))(); document.write('<br>a: ' + a); document.write('<br>b: ' + b); document.write('<br>c: ' + c);})()document.write('<br>a: ' + a);document.write('<br>b: ' + b);document.write('<br>c: ' + c);執(zhí)行此段代碼后，得到如下結(jié)果a: undefinedb: 2c: 3a: undefinedb: undefinedc: 3
JS面試題，關(guān)于eval與new Function
慕后森
2018-08-03 00:22:31
