ES6 - toLowerCase()

此方法返回已转换为小写的调用字符串值。

语法

string.toLowerCase( )  

返回值

返回已转换为小写的调用字符串值。

示例

var str = "Apples are round, and Apples are Juicy."; 
console.log(str.toLowerCase( ))   

输出

apples are round, and apples are juicy.