ES6 字符串String 方法includes()
ES6 字符串String 方法includes()
var str = 'Hello World';
console.log(str.includes('hell'))
console.log(str.includes('Hell'));
console.log(str.includes('or'));
console.log(str.includes('or',1))
var str = 'Hello World';
console.log(str.includes('hell'))
console.log(str.includes('Hell'));
console.log(str.includes('or'));
console.log(str.includes('or',1))