es6-字元串模板

// es5
let ananiah = "大誒呀";
let blog = "我要忘了你的樣子"+ ananiah;
console.log(blog); //我要忘了你的樣子大誒呀

// es6字元串模板
let anania = "大誒呀";
let blogs = `<b>我要忘</b><br>
了你的樣子${anania}`;
document.write(blogs); //可以放HTML標簽

let a = 1;
let b = 2;
let result = `${a+b}`;
document.write(result);  //3

字元串查找

// 字元串查找
//es5
let ananiahs = "大誒呀";
let blogss = "我要忘了你的樣子大誒呀";
document.write(blogss.indexOf(ananiahs)); //8

//es6
let ananiahs6 = "大誒呀";
let blogss6 = "大誒呀我要忘了你的樣子大誒呀";
document.write(blogss6.includes(ananiahs6)); //true 是否存在
document.write(blogss6.startsWith(ananiahs6)); //true  頭部是否存在
document.write(blogss6.endsWith(ananiahs6)); //true  尾部是否存在

字元串複製

//字元串複製 repeat 方法
document.write('ananiah |'.repeat(30)); //複製三十個