AngularJs:自定义指令中的模板 [英] AngularJs: Customizing the template within a Directive
问题描述
我有一个使用的标记从引导一种形式,如下所示:
<窗体类=形横>
<&字段集GT;
<传奇>联想文字< /传说>
< DIV CLASS =控制组>
<标签类=控制标签为=nameInput>名称和LT; /标签>
< DIV CLASS =控制>
<输入类型=文本级=输入XLARGEID =nameInput>
< p =班帮助块>支持帮助文字< / P>
< / DIV>
< / DIV>
< /字段集>
< /表及GT;
那里面有很多样板code,那我想降低到一个新的指令 - 表单输入,就像如下:
<形式输入标签=名称的形式-ID =nameInput>< /表单输入>
生成:
< DIV CLASS =控制组>
<标签类=控制标签为=nameInput>名称和LT; /标签>
< DIV CLASS =控制>
<输入类型=文本级=输入XLARGEID =nameInput>
< / DIV>
< / DIV>
我有这么多的通过一个简单的模板工作。
angular.module('formComponents',[])
.directive('的formInput',函数(){
返回{
限制:'E',
范围: {
标签:'绑定',
formId:'绑定'
},
模板:'< DIV CLASS =控制组>' +
'<标签类=控制标签为={{formId}}> {{标签}}< /标签> +
'< DIV CLASS =控制>' +
'<输入类型=文本级=输入XLARGEID ={{formId}}NAME ={{formId}}>' +
'< / DIV>' +
'< / DIV>' }
})
然而,当我来到加入更先进的功能,我被卡住它。
如何支持默认值在模板?
我想揭露类型参数设置为我的指令可选属性,例如:
<形式输入标签=密码的形式-ID =密码TYPE =密码/>< /表单输入>
<形式输入标签=电子邮件地址的形式-ID =EMAILADDRESSTYPE =电子邮件/>< /表单输入>
但是,如果未指定任何内容,我想默认为文字
。我如何支持呢?
如何可以自定义模板基础上,presence /不存在的属性?
我也希望能够支持要求的属性,如果它是present。
例如:
<形式输入标签=电子邮件地址的形式-ID =EMAILADDRESSTYPE =电子邮件要求/>< /表单输入>
如果要求
是指令present,我想将它添加到生成的<输入/>
在输出中,并以其他方式忽略它。我不知道如何实现这一点。
我怀疑这些要求已经超越了一个简单的模板,并开始使用pre-编译阶段,但我不知所措我从哪里开始。
angular.module('formComponents',[])
.directive('的formInput',函数(){
返回{
限制:'E',
编译:功能(元素,ATTRS){
VAR类型= attrs.type || '文本';
var里面= attrs.hasOwnProperty('需要')? 需要='需要':;
VAR的htmlText ='< DIV CLASS =控制组>' +
'<标签类=控制标签为=+ attrs.formId +'>' + attrs.label +'< /标签> +
'< DIV CLASS =控制>' +
'<输入类型=+类型+'级=输入XLARGEID =+ attrs.formId +'NAME =+ attrs.formId +''+需要+'>' +
'< / DIV>' +
'< / DIV>';
element.replaceWith(的htmlText);
}
};
})
I have a form that is using markup from Bootstrap, like the following:
<form class="form-horizontal">
<fieldset>
<legend>Legend text</legend>
<div class="control-group">
<label class="control-label" for="nameInput">Name</label>
<div class="controls">
<input type="text" class="input-xlarge" id="nameInput">
<p class="help-block">Supporting help text</p>
</div>
</div>
</fieldset>
</form>
There's a lot of boilerplate code in there, that I'd like to reduce to a new directive - form-input, like follows:
<form-input label="Name" form-id="nameInput"></form-input>
generates:
<div class="control-group">
<label class="control-label" for="nameInput">Name</label>
<div class="controls">
<input type="text" class="input-xlarge" id="nameInput">
</div>
</div>
I have this much working via a simple template.
angular.module('formComponents', [])
.directive('formInput', function() {
return {
restrict: 'E',
scope: {
label: 'bind',
formId: 'bind'
},
template: '<div class="control-group">' +
'<label class="control-label" for="{{formId}}">{{label}}</label>' +
'<div class="controls">' +
'<input type="text" class="input-xlarge" id="{{formId}}" name="{{formId}}">' +
'</div>' +
'</div>'
}
})
However it's when I come to add in more advanced functionality that I'm getting stuck.
How can I support default values in the template?
I'd like to expose the "type" parameter as an optional attribute on my directive, eg:
<form-input label="Password" form-id="password" type="password"/></form-input>
<form-input label="Email address" form-id="emailAddress" type="email" /></form-input>
However, if nothing is specified, I'd like to default to "text"
. How can I support this?
How can I customize the template based on the presence / absence of attributes?
I'd also like to be able to support the "required" attribute, if it's present. Eg:
<form-input label="Email address" form-id="emailAddress" type="email" required/></form-input>
If required
is present in the directive, I'd like to add it to the generated <input />
in the output, and ignore it otherwise. I'm not sure how to achieve this.
I suspect these requirements may have moved beyond a simple template, and have to start using the pre-compile phases, but I'm at a loss where to start.
angular.module('formComponents', [])
.directive('formInput', function() {
return {
restrict: 'E',
compile: function(element, attrs) {
var type = attrs.type || 'text';
var required = attrs.hasOwnProperty('required') ? "required='required'" : "";
var htmlText = '<div class="control-group">' +
'<label class="control-label" for="' + attrs.formId + '">' + attrs.label + '</label>' +
'<div class="controls">' +
'<input type="' + type + '" class="input-xlarge" id="' + attrs.formId + '" name="' + attrs.formId + '" ' + required + '>' +
'</div>' +
'</div>';
element.replaceWith(htmlText);
}
};
})
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