JS高级---识别正则表达式是否匹配

Posted 2021-03-16 jane_panyiyun

识别正则表达式是否匹配

 

    console.log(/[a-zA-Z]+/.test("hello"));

    console.log(/./.test("除了回车换行以为的任意字符"));//true
    console.log(/.*/.test("0个到多个"));//true
    console.log(/.+/.test("1个到多个"));//true
    console.log(/.?/.test("哈哈"));//true
    console.log(/[0-9]/.test("9527"));//true
    console.log(/[a-z]/.test("what"));//true
    console.log(/[A-Z]/.test("Are"));//true
    console.log(/[a-zA-Z]/.test("干啥子"));//false
    console.log(/[0-9a-zA-Z]/.test("9ebg"));//true
    console.log(/b|(ara)/.test("abra"));//true
    console.log(/[a-z]{2,3}/.test("arfsf"));//true

 

 

 

    console.log(/\\d/.test("998")); //true

    console.log(/\\d*/.test("998"));

    console.log(/\\d+/.test("998"));

    console.log(/\\d{0,}/.test("998"));

    console.log(/\\d{2,3}/.test("998"));

    console.log(/\\D/.test("eat"));

    console.log(/\\s/.test("  "));
    console.log(/\\S/.test("嘎嘎 "));
    console.log(/\\w/.test("_"));
    console.log(/\\W/.test("_"));