### search找下标 ~~~ var reg01 =/l/g; var str = "hello g"; console.log(str.search(reg)); ~~~ ### indexof找下标 ~~~ var reg01 =/l/g; var str = "hello g"; console.log(str.indexof(g)); ~~~ 区别： ~~~ search找下标可以传对象 ~~~