1.匹配11位手機號，開頭字母位1
^1\d{10}$
2.匹配姓名，中文3-6位
[\u4e00-\u9fa5]{3,6}
3.匹配密碼，必須是6-16位的字符，只能包含數字、字母、下劃線：
$\w{6-16}^
4.匹配郵箱
^\w+@\w+(\.\w+){1,2}
5.匹配座機號
^\d{1,3}-\d{4,8}$
6.匹配一個正數
^\d+(\.\d+)?$
7.匹配一個小數
^-?\d+\.\d+
8.匹配一個整數
^-?\d+$
9.寫一個正則運算式，去匹配一個字串，得到匹配的次數，和匹配的結果
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Document</title>
</head>
<body>
<script>
var reg = /\d{3}/g;
var s = "1234a;sdfja;sd234lkfjasldkfj";
var n = 0;
while(result = reg.exec(s)){
n++;
console.log(result[0]);
}
console.log(`匹配${n}次`);
</script>
</body>
</html>
index.html
10.得到一個字串中中文字符的數量：
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Document</title>
</head>
<body>
<script>
var reg = /[\u4e00-\u9fa5]/g;
var s = "1234a;s水電費234lkfjasldkfj";
var n = 0;
while(reg.test(s)){
n++;
}
console.log(n);
</script>
</body>
</html>
index.html
11.過濾敏感詞，將一個字串中出現的敏感詞替換為3個星號：
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Document</title>
</head>
<body>
<script>
var senWords = ["小明", "小紅", "小王"];
//將字串中敏感詞匯替換為指定的字串
function filterSensitiveWords(s, repStr){
var reg = new RegExp(`(${senWords.join("|")})+`,"g");
return s.replace(reg, repStr);
}
console.log(filterSensitiveWords("小明小紅小王三個人去上學，課堂上小明調皮搗蛋，小紅認真聽課，小王在發呆", "***"));
</script>
</body>
</html>
index.html
12.將一串數字從后向前每三個數字用逗號隔開：
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Document</title>
</head>
<body>
<script>
var s = "123123123";
//不是字符邊界，后面是三個數字出現1到多次直到結束，全域匹配
var reg = /\B(?=(\d{3})+$)/g;
console.log(s.replace(reg, ","));
</script>
</body>
</html>
index.html
結果展示：
13.判斷密碼強度，要求密碼中必須出現小寫字母、大寫字母、數字、特殊字符(!@#_,.)：
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Document</title>
</head>
<body>
<script>
//判斷密碼強度，要求密碼中必須出現小寫字母、大寫字母、數字、特殊字符(!@#_,.)
var s = "123asdf&AAA(";
var reg = /^(?=.*[a-z])(?=.*[A-Z])(?=.*\d)(?=.*[(!#_,.)]).{6,12}$/;
console.log(reg.test(s));
</script>
</body>
</html>
index.html
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標籤：JavaScript