$(document).ready(function() {
// #login-box password field
$('#password').attr('type', 'text');
$('#password').val('Password');
});
这是为了将password类型的#password输入字段(id="password")更改为普通的文本字段，然后填充文本"password"。
但这并不奏效。为什么?
表格如下:
<form enctype="application/x-www-form-urlencoded" method="post" action="/auth/sign-in">
<ol>
<li>
<div class="element">
<input type="text" name="username" id="username" value="Prihlasovacie meno" class="input-text" />
</div>
</li>
<li>
<div class="element">
<input type="password" name="password" id="password" value="" class="input-text" />
</div>
</li>
<li class="button">
<div class="button">
<input type="submit" name="sign_in" id="sign_in" value="Prihlásiť" class="input-submit" />
</div>
</li>
</ol>
</form>
下面是允许您更改文档中元素类型的一小段代码。
jquery.type.js (GitHub Gist)
var rtype = /^(?:button|input)$/i;
jQuery.attrHooks.type.set = function(elem, value) {
// We can't allow the type property to be changed (since it causes problems in IE)
if (rtype.test(elem.nodeName) && elem.parentNode) {
// jQuery.error( "type property can't be changed" );
// JB: Or ... can it!?
var $el = $(elem);
var insertionFn = 'after';
var $insertionPoint = $el.prev();
if (!$insertionPoint.length) {
insertionFn = 'prepend';
$insertionPoint = $el.parent();
}
$el.detach().attr('type', value);
$insertionPoint[insertionFn]($el);
return value;
} else if (!jQuery.support.radioValue && value === "radio" && jQuery.nodeName(elem, "input")) {
// Setting the type on a radio button after the value resets the value in IE6-9
// Reset value to it's default in case type is set after value
// This is for element creation
var val = elem.value;
elem.setAttribute("type", value);
if (val) {
elem.value = val;
}
return value;
}
}
它通过从文档中删除输入、更改类型然后将其放回原来的位置来解决这个问题。
请注意，这段代码只针对WebKit浏览器进行了测试——对其他任何浏览器都不能保证!
这样就可以了。尽管可以改进为忽略现在不相关的属性。
插件:
(function($){
$.fn.changeType = function(type) {
return this.each(function(i, elm) {
var newElm = $("<input type=\""+type+"\" />");
for(var iAttr = 0; iAttr < elm.attributes.length; iAttr++) {
var attribute = elm.attributes[iAttr].name;
if(attribute === "type") {
continue;
}
newElm.attr(attribute, elm.attributes[iAttr].value);
}
$(elm).replaceWith(newElm);
});
};
})(jQuery);
用法:
$(":submit").changeType("checkbox");
小提琴:
http://jsfiddle.net/joshcomley/yX23U/
我已经创建了一个jQuery扩展之间切换文本和密码。适用于IE8(可能也适用于ie6和ie7，但没有测试)，不会丢失你的值或属性:
$.fn.togglePassword = function (showPass) {
return this.each(function () {
var $this = $(this);
if ($this.attr('type') == 'text' || $this.attr('type') == 'password') {
var clone = null;
if((showPass == null && ($this.attr('type') == 'text')) || (showPass != null && !showPass)) {
clone = $('<input type="password" />');
}else if((showPass == null && ($this.attr('type') == 'password')) || (showPass != null && showPass)){
clone = $('<input type="text" />');
}
$.each($this.prop("attributes"), function() {
if(this.name != 'type') {
clone.attr(this.name, this.value);
}
});
clone.val($this.val());
$this.replaceWith(clone);
}
});
};
效果非常好。你可以简单地调用$('#element').togglePassword();在两者之间切换或给出一个选项来“强制”基于其他东西(如复选框)的动作:$('#element').togglePassword($checkbox.prop('checked'));
