初识JavaScript
JavaScript了解
var a = 10 console.log(isNaN(a)) //false var str = 'abc' console.log(isNaN(Number(str)))//true
文章标题：初识JavaScript
文章URL：http://www.ncnanbu.com/article/dsojjgd.html
var a = 10 console.log(isNaN(a)) //false var str = 'abc' console.log(isNaN(Number(str)))//true
