如何在AngularJS中以编程方式触发表单提交?

问题描述

从Angular的文档中可以看到， ngSubmit 是提交表单的首选方式.所有挂起的操作将立即完成，并且还将设置$submitted标志.收听ngClick事件的效果不同.

From Angular's documentation it follows that ngSubmit is a preferred way of submitting a form. All pending operations are immediately finished and $submitted flag is set as well. Whereas listening to ngClick event does not have the same effect.

现在，我需要提交一个包含所有具有ngSubmit方法优点的热键的表单.因此，我需要一些触发标准提交工作流的方法.

Now I need to submit a form with hotkeys having all the goodies of ngSubmit approach. Hence I need some way to trigger standard submit workflow.

我在DOM表单上尝试了submit()，它可以工作，但是附加到scope的angular的form对象不包含对DOM表单的引用，因此我需要通过jqLit​​e访问它:

I tried submit() on DOM form and it worked, but angular's form object attached to scope contains no references to DOM form, thus I need to access it through jqLite:

var frm = angular.element('#frmId');
frm.submit();

我不喜欢这种在控制器代码中访问DOM的解决方案，所以我创建了一条指令:

I didn't like this solution for accessing DOM in controller code so I created a directive:

function wuSubmit() {
    return {
        require: 'form',
        restrict: 'A',
        link: function(scope, element, attributes) {
            var scope = element.scope();
            if (attributes.name && scope[attributes.name]) {
                scope[attributes.name].$submit = function() {
                    element[0].submit();
                };
            }
        }
    };
}

使用$submit方法扩展表单对象.

which extends form object with $submit method.

这两个变体由于未知的原因而无法正常工作. form.submit()尝试发送数据，但不会阻止默认操作.


更新1
事实证明，Angular侦听具有type="input"的元素的click事件.
最终，我决定触发该元素的点击事件:

Both variants do not work for yet unknown reason. form.submit() tries to send data, default action is not prevented.


Update 1
It turns out that Angular listens to click events of elements having type="input".
Eventually I decided to trigger click event for that element:

wuSubmit.$inject = ['$timeout'];
function wuSubmit($timeout) {
    return {
        require: 'form',
        restrict: 'A',
        link: function (scope, element, attributes) {
            var submitElement = element.find('[type="submit"]').first();

            if (attributes.name && scope[attributes.name]) {

                scope[attributes.name].$submit = submit;
            }

            function submit() {
                $timeout(function() {
                    submitElement.trigger('click');
                });
            }
        }
    };
}

是否有针对此功能的现成解决方案?

Is there any out of the box solution for this functionality?

推荐答案

只需在表单元素上使用事件.triggerHandler('submit').

Just use event .triggerHandler('submit') on form element.

myApp.directive("extSubmit", ['$timeout',function($timeout){
    return {
        link: function($scope, $el, $attr) {
            $scope.$on('makeSubmit', function(event, data){
              if(data.formName === $attr.name) {
                $timeout(function() {
                  $el.triggerHandler('submit'); //<<< This is Important

                  //equivalent with native event
                  //$el[0].dispatchEvent(new Event('submit'))
                }, 0, false);
              }
            })
        }
    };
}]);

查看 http://jsfiddle.net/84bodm5p/

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