js 字符串：敏感词过滤文本框监测验证码

Posted 2022-09-28 wenlx

//文本框监测

 

<input type="text" id="txt">

<span id="tip"></span>

<script>

/*

长度为6-16

全是数字为弱

有特殊字符为强

其他为中

*/

//给txt绑定事件

var str = "@#$%^&*";

txt.oninput = function ()

//判断长度

if(txt.value.length < 6 || txt.value.length > 16)

return tip.innerhtml = "长度不合法";

//判断数字

if(Number(txt.value) == txt.value)

return tip.innerHTML = "密码强度弱";

//判断是否含有特殊字符

for(var i = 0; i < str.length; i++)

if(txt.value.indexOf(str[i]) != -1)

return tip.innerHTML = "密码强度强";

 

 

</script>

 

 

//敏感词过滤

 

<input type="text" id="txt">

<button id="btn">提交</button>

<span id="tip"></span>

<script>

var arr = ["sb", "fuck", "md", "laji"];

//给btn绑定事件

btn.onclick = function()

var txtvalue = txt.value;

for(var i = 0; i < arr.length; i++)

txtvalue = txtvalue.replace(arr[i], "*");

tip.innerHTML = txtvalue;

 

</script>

 

//验证码

 

 

<span id="code"></span>

<button id="btn">获取验证码</button>

<script>

//给btn绑定事件

btn.onclick = function ()

var str = "";

var num = null;

//获取4个随机数

for(var i = 0; i < 4; i++)

num = parseInt(Math.random() * 74 + 48);

//判断num是否合格

if(num >= 48 && num <= 57 || num >= 65 && num <= 90 || num >= 97 && num <= 122)

str += String.fromCharCode(num);

else

i--;

 

code.innerHTML = str;

code.style.color = randomColor();

//随机颜色

function randomColor()

var str = "0123456789abcdf";

var color ="#";

for(var i = 0; i < 6; i++)

color += str[parseInt(Math.random() * 16)];

return color;