替换为true时合并ngClass属性 [英] merge ngClass attributes when replace true
问题描述
这是我的指令,替换:true
在指令定义上设置
Here is my directive which has replace: true
set on directive definition
<my-custom-tag>
</my-custom-tag>
这是指令模板
<div data-ng-class="{'class1': condition1, 'class2': condition2}">
</div>
现在,如果按照以下方式使用my指令,则会抛出错误
Now if the use my directive as follows it throws up error
<my-custom-tag data-ng-class="{'class3': condition3}"></my-custom-tag>
原因是,因为模板还定义了 data-ng-class
属性,发出的HTML如下
The reason being, since the template also defines a data-ng-class
attribute, the emitted HTML is as follows
<div data-ng-class="{'class3': condition3} {'class1': condition1, 'class2': condition2}"></div>
因此编译模板时出现语法错误。有没有办法合并这些对象?
Hence the syntax error while compiling template. Any way to merge these objects ?
Plunkr ,查看浏览器控制台中的错误消息并检查元素以检查 data-ng-class
属性
Plunkr, look at the browser console for the error message and inspect element to check the data-ng-class
attribute
推荐答案
我看到有一个打开问题谈论这个。
I saw that there is a open issue talking about this.
您可以使用编译
在链接功能之前修改表达式触发。 Plunkr 。
You can use compile
to modify the expression before the link function is triggered. Plunkr.
angular.module('directive', []).directive('myCustomTag', function() {
return {
template: "<div data-ng-class=\"{'foo': whenFoo()}\">My Custom Tag</div>",
restrict: 'E',
replace: true,
compile: function compile(tElement, tAttrs) {
tAttrs.ngClass = tAttrs.ngClass.replace(/}\s*{/g, ', ');
return function (scope, iElement, iAttrs) {
scope.whenFoo = function() {
return true;
};
};
}
};
});
这篇关于替换为true时合并ngClass属性的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持IT屋!