１、字符串Unicode表示法

  1. console.log("\u0061");

2、字符串遍历器接口,for of

  1.     <script>
  2.         let str = 'abcdefg';
  3.         for(let i=0;i<str.length;i++){
  4.             console.log(str[i]);
  5.         }
  7.         for (let s of str) {
  8.             console.log(s);
  9.         }
  10.     </script>

3、模板字符串方法

  1. <body>
  2.     <div id="contianer"></div>
  3.     <div id="contianer2"></div>
  4.     <script>
  5.         //es5字符串拼接方法
  6.         var a;
  7.         var href = "https://baidu.com";
  8.         var text = "百度";
  9.         a = "<a href='"+href+"'>"+text+"</a>";
  10.         console.log(a);
  11.         var contianer = document.getElementById("contianer");
  12.         contianer.innerHTML = a;
  14.         //es6字符串模板方法
  15.         let aa = `<a href='${href}'>${text}</a>`
  16.         var contianer2 = document.getElementById("contianer2");
  17.         contianer2.innerHTML = aa;
  18.     </script>
  19. </body>

4、字符包含、以某字符开头、结尾方法

  1.     <script>
  2.         let str = 'abcdefg';
  3.         //只有一个参数时
  4.         console.log(str.includes('abc'));       //true
  5.         console.log(str.startsWith('abc'));     //true
  6.         console.log(str.endsWith('fg'));        //true
  8.         //添加第二个参数时代表是从那个下标位置开始搜索
  9.         console.log(str.includes('abc',2));     //false
  10.         console.log(str.startsWith('def',3));   //true
  11.         console.log(str.endsWith('abcde',5));   //true
  12.     </script>

5、字符重复、字符补全

  1.     <script>
  2.         let str = 'a';
  3.         console.log(str.repeat(2));
  4.         console.log(str.padStart(10,"12345"));
  5.         console.log(str.padEnd(10,"123"));
  6.     </script>

6、空格去除

  1.     <script>
  2.         let str = '   A   ';
  3.         console.log(str.trim());
  4.         console.log(str.trimStart());
  5.         console.log(str.trimEnd());
  6.     </script>

7、指定获取某个下标的字符

  1.     <script>
  2.         let str = 'abcdefg';
  3.         console.log(str.at(1));
  4.         console.log(str.charAt(1));
  5.     </script>