# 判断正则表达式是否匹配成功 <br> >[info]正则表达式调用test()方法测试，匹配成功返回值是true，不成功返回值false **在非严格模式下，只要满足其一就会直接返回true** ***** >[danger]**严格模式是有^$规定的正则表达式** ```javescript 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"));//true console.log(/\d+/.test("998"));//true console.log(/\d{0,}/.test("998"));//true console.log(/\d{2,3}/.test("998"));//true console.log(/\D/.test("eat"));//true console.log(/\s/.test(" "));//true console.log(/\S/.test("嘎嘎"));//true console.log(/\w/.test("_"));//true console.log(/\W/.test("_"));//false ```