使用 javascript / jquery 闭包在 ul >li 层次结构中级联值

发布于 2024-10-06 10:21:21 字数 924 浏览 2 评论 0原文

我有 ul >力> ul>礼等级制度。每个 li 都有与其关联的输入文本框。我想将 onchange 事件处理程序附加到每个输入元素，以便当该元素更改时，所有后续子输入元素也继承该值。我想在每个元素最里面的 .bind 函数周围实现一个闭包，以便我可以在运行时传入父输入值。如何最好地实现这一点？

var $generatedFeatureTree = $('.generated','#feature_weights');

// Get all input text boxes in the top level div
var generatedWeights = $generatedFeatureTree.find('input[type="text"]');

for(var i =0; i< generatedWeights.length; ++i){

    var $this = $(generatedWeights[i]);
    var value = $this.val();

    $this.bind('change',function(value){
        $$this = $(this);

        // get all children input elements of this node by traversing a parent 'li'
        // and getting the lone 'ul' child
        var children = $$this.parent('li').children('ul').find('input[type="text"]');

        for(var j=0;j<children.length;++j){
            $$$this = $(children[j]);
            $$$this.val(value);
        }
    });

    }

原文

I have ul > li > ul > li hierarchy. Each li has input text box associated to it. I want to attach onchange event handlers to each input element so that when that element is changed all subsequent children input elements also inherit this value. I want to implement a closure around the innermost .bind function for each element so that I can pass in the parent input value on runtime. How best is this accomplished?

var $generatedFeatureTree = $('.generated','#feature_weights');

// Get all input text boxes in the top level div
var generatedWeights = $generatedFeatureTree.find('input[type="text"]');

for(var i =0; i< generatedWeights.length; ++i){

    var $this = $(generatedWeights[i]);
    var value = $this.val();

    $this.bind('change',function(value){
        $this = $(this);

        // get all children input elements of this node by traversing a parent 'li'
        // and getting the lone 'ul' child
        var children = $this.parent('li').children('ul').find('input[type="text"]');

        for(var j=0;j<children.length;++j){
            $$this = $(children[j]);
            $$this.val(value);
        }
    });

    }

分享到QQ

分享到微博

如果你对这篇内容有疑问，欢迎到本站社区发帖提问参与讨论，获取更多帮助，或者扫码二维码加入 Web 技术交流群。

发布评论

需要登录才能够评论，你可以免费注册一个本站的账号。

非要怀念 2024-10-13 10:21:21

也许我误解了你想要什么，但我认为你有一个过度设计的解决方案。你就不能像这样做吗？

var myInputs = $('input[type=text]');  //use whatever selector you need to grab ALL textboxes
myInputs.change(function() {
    $(this).siblings('ul').find('input[type=text]').val($(this).val());
});

输入处于什么级别对您来说并不重要，您需要做的就是将低于该级别的所有输入设置为相同的值。因此，您可以将相同的更改函数附加到所有输入。我的函数只是查找与输入同级的

这是一个现场演示：http://jsfiddle.net/Ender/wXqcE/

Maybe I'm misunderstanding what you want, but I think you have an overengineered solution there. Couldn't you just do it like this?

var myInputs = $('input[type=text]');  //use whatever selector you need to grab ALL textboxes
myInputs.change(function() {
    $(this).siblings('ul').find('input[type=text]').val($(this).val());
});

It doesn't really matter to you what level the input is at, all you need to be able to do is set all the inputs below that one to the same value. As such, you can attach the same change function to all the inputs. My function just looks for a <ul> that is a sibling to the input, finds all the textboxes in that <ul>, and sets them to the same value as the parent text box. I think that's what you were looking to accomplish.

Here's a live demo of that: http://jsfiddle.net/Ender/wXqcE/

回复收藏 0 原文

~没有更多了~