[英]How to display 4 digits in the password field
I'm using normal JS and JSP which contains normal HTML tags. 我正在使用包含普通HTML标记的普通JS和JSP。 I have an input field with the type as PASSWORD which contains the maxlength of 10 digits.
我有一个类型为PASSWORD的输入字段,其中包含10位数字的最大长度。
Now I want to display the last 4 digits of the field values and other digits should be masked. 现在,我想显示字段值的最后4位数字,其他数字应被屏蔽。
I'm not using jQuery and I want to use in normal JS. 我没有使用jQuery,而是想在普通JS中使用。
So can anyone please suggest me any approach on it to achieve. 因此,任何人都可以向我建议实现此目标的任何方法。
Try following these steps. 请尝试按照以下步骤。
•
( ASCII-7
character). •
( ASCII-7
字符)替换前导字符。 Check out this fiddle . 看看这个小提琴 。
Here is the snippet. 这是代码段。
var passField = document.getElementById('pass'); passField.type = "text"; var passValue = passField.value; var passLength = passValue.length; var masked = passValue.substring(0, passLength - 4); masked = masked.replace(/./g, '•'); //The character is ASCII-7 (Press Alt+7 to type) var text = passValue.substring(passLength - 4); var newPass = masked + text; passField.value = newPass;
<input type='password' id='pass' value="ThisIsPassword" />
CSS 的CSS
#wrapper {
position: relative;
}
#wrapper > input {
font-family: monospace;
text-align: right;
}
#wrapper > [type=password]::-ms-reveal{
display: none;
}
#passwordMasked {
width: 10em;
border: solid 1px black;
border-right: none;
}
#wrapper > #passwordUnmasked {
border: solid 1px black;
border-left: none;
width: 3em;
text-align: left;
}
#password {
position: absolute;
left: 0;
opacity: 0;
width: 13em;
}
HTML 的HTML
<div id="wrapper">
<input type="password" onkeyup="updateunmasked()" id="passwordMasked" /><input type="text" id="passwordUnmasked" readonly /><input type="password" onkeyup="updateunmasked()" id="password" />
</div>
Javascript Java脚本
function updateunmasked() {
var p = document.getElementById("password").value;
document.getElementById("passwordUnmasked").value = (' ' + p.substring(Math.max(p.length - 4, 0))).substring(Math.min(p.length, 4));
document.getElementById("passwordMasked").value = p.substring(4);
}
JSBin - https://jsbin.com/wijifupuco/1/edit?html,css,js,output JSBin- https: //jsbin.com/wijifupuco/1/edit ? html,css,js,输出
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