原文链接：https://blog.csdn.net/weixin_45022563/article/details/119675272
1.数组是数字或者字符串类型的
var a = ["1","2"];
alert(a.indexOf("3"));//返回-1
2.数组是json对象
var a = [{name:"1"},{name:"2"}];
alert(a.findIndex(suibiandebianliangmingcheng=>{return suibiandebianliangmingcheng.name=="1"}));//返回0
alert(a.findIndex(suibiandebianliangmingcheng=>{return suibiandebianliangmingcheng.name=="3"}));//返回-1
原创文章，作者：Maggie-Hunter，如若转载，请注明出处：https://blog.ytso.com/tech/webdev/272609.html