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@ -154,9 +154,11 @@ console.log('a 出现的次数是: ' + num);
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const name = 'qianguyihao';
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console.log(name.search('yi')); // 打印结果:6
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console.log(name.search(/\yi/i)); // 打印结果:6
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console.log(name.search(/yi/i)); // 打印结果:6
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```
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备注:上方的`/yi/i`采用的是正则表达式的写法,意思是,让 name去匹配字符`yi`,忽略大小写。
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### 3、includes():字符串中是否包含指定的内容
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