Question

我正在尝试使用html绑定将一些html绑定到标签，导致标签显示指定的文本。

标签不显示任何文本，但在浏览器中检查页面显示它使用html绑定显示一些文本（不显示文本）。

为什么文字没有显示在标签上？

这是我的代码：

将html绑定到viewmodel（记下代码注释）：

"use strict";

qb.bindings.QuoteDetails = function (quoteDetailsVm) {
    var _$step1 = $("#step1");

    var _quoteDetailsSelector = ".quoteBuy";
    _$step1.find(".saveQuote" + _quoteDetailsSelector)
        .koClick("saveQuote")
        .koText("saveQuoteLabel");


    var ctaText = _$step1.find(".callToActionDescription");
    ctaText.koHtml("processedCtaText");
    $.koDataBind();

    quoteDetailsVm.email = "'sdfd'";
    _$step1.find("div.email label").koHtml(quoteDetailsVm.email); // this is the label to bind

    var _nodes = _$step1.find(_quoteDetailsSelector);
    _nodes.push(ctaText[0]);
    _.each(_nodes, function(node) {
        ko.applyBindings(quoteDetailsVm, node);
    });
};

这是我们定义kohtml（）：

的地方

(function ($) {
    var _bindings = [];

    var _koBind = function ($selector, binding, value) {
        var _jsToString = function(input) {
            var _result = "";

            for (var _key in input) {
                var _val = input[_key];
                if (typeof(_val) === "object")
                    _val = _jsToString(_val);

                _result = _result + (_result ? ", " : "") + _key + ": " + _val;
            }

            return "{ " + _result + " }";
        };

        if ($selector.length === 0) {
            console.warn("koBind selector does not return any elements - " + $selector.selector);
            return $selector;
        }

        if (typeof (value) === "object")
            value = _jsToString(value);

        _bindings.push({
            $selector: $selector,
            binding: binding,
            value: value
        });

        return $selector;
    };

    $.fn.koBind = function (binding, value) {
        return _koBind(this, binding, value);
    };

    $.fn.koVisible = function (visibility) {
        return _koBind(this, "visible", visibility);
    };

    $.fn.koText = function (text) {
        return _koBind(this, "text", text);
    };

    $.fn.koHtml = function (html) {
        return _koBind(this, "html", html);
    };

    $.fn.koCss = function (classes) {
        return _koBind(this, "css", classes);
    };

    $.fn.koStyle = function (styles) {
        return _koBind(this, "style", styles);
    };

    $.fn.koAttr = function (attrs) {
        return _koBind(this, "attr", attrs);
    };

    $.fn.koForeach = function (enumerable) {
        return _koBind(this, "foreach", enumerable);
    };

    $.fn.koIf = function (condition) {
        return _koBind(this, "if", condition);
    };

    $.fn.koIfnot = function (condition) {
        return _koBind(this, "ifnot", condition);
    };

    $.fn.koWith = function (context) {
        return _koBind(this, "with", context);
    };

    $.fn.koClick = function (callback) {
        return _koBind(this, "click", callback);
    };

    $.fn.koEvent = function (events) {
        return _koBind(this, "event", events);
    };

    $.fn.koSubmit = function (onSubmit) {
        return _koBind(this, "submit", onSubmit);
    };

    $.fn.koEnable = function (condition) {
        return _koBind(this, "enable", condition);
    };

    $.fn.koDisable = function (condition) {
        return _koBind(this, "disable", condition);
    };

    $.fn.koValue = function (value) {
        return _koBind(this, "value", value);
    };

    $.fn.koHasfocus = function (condition) {
        return _koBind(this, "hasfocus", condition);
    };

    $.fn.koChecked = function (condition) {
        return _koBind(this, "checked", condition);
    };

    $.fn.koOptions = function (optionList) {
        return _koBind(this, "options", optionList);
    };

    $.fn.koOptionsCaption = function (optionsCaption) {
        return _koBind(this, "optionsCaption", optionsCaption);
    };

    $.fn.koSelectedOptions = function (selectedList) {
        return _koBind(this, "selectedOptions", selectedList);
    };

    $.fn.koUniqueName = function (enabled) {
        return _koBind(this, "uniqueName", enabled);
    };

    $.fn.koPlaceholder = function(text) {
        return _koBind(this, "attr", { placeholder: text });
    };

    $.koDataBind = function () {
        var _elements = [];

        // put all the elements into an array
        var _findElement = function (el) {
            var _found = _elements.filter(function (element) {
                return element.element == el;
            });

            if (_found)
                return _found[0];

            return false;
        };

        $.each(_bindings, function (i, binding) {
            $.each(binding.$selector, function (j, el) {
                var _element = _findElement(el);
                if (_element) {
                    _element.bindings.push({
                        binding: binding.binding,
                        value: binding.value
                    });
                } else {
                    _elements.push({
                        element: el,
                        bindings: [{
                            binding: binding.binding,
                            value: binding.value
                        }]
                    });
                }
            });
        });

        _bindings = [];

        $.each(_elements, function (index, element) {
            var _el = element.element;

            var _bindVal = "";
            $.each(element.bindings, function (i, binding) {
                if (_bindVal)
                    _bindVal = _bindVal + ", " + binding.binding + ": " + binding.value;
                else
                    _bindVal = binding.binding + ": " + binding.value;
            });

            $(_el).attr("data-bind", _bindVal);
        });
    };

    $.koApplyBindings = function (viewModel) {
        $.koDataBind();
        ko.applyBindings(viewModel);
    };
})(jQuery);

这是已编码的相关html：

<!-- Primary Email Field-->

    <div class="email row">
        <div class="label">
            <label></label>
        </div>
        <div class="field">
            <input class="email" type="text" placeholder="e.g. john.smith@example.com" autocomplete="email" />
            <p class="error-message emailError"></p>
        </div>
    </div>

    <!-- End Primary Email Field-->

这是通过检查浏览器中的页面来输出html：

<div class="email row">
        <div class="label">
            <label data-bind="html: 'sdfd'"></label>
        </div>
        <div class="field">
            <input class="email" type="text" placeholder="e.g. john.smith@example.com" autocomplete="email">
            <p class="error-message emailError"></p>
        </div>
    </div>

Answer 1

您认为代码有什么问题？

在Knockout中，HTML描述了整个应用程序。与普通HTML描述页面结构的方式相同，Knockout绑定描述了所有行为：可点击的内容，显示变量的内容等。附加绑定的技术可以消除所有清晰度，而无需做任何更好的事情。还有一层额外的代码只是为了附加绑定，需要深入了解HTML结构才能知道绑定的位置。这是不可理解的。它显然不起作用。

我的建议是将标记放回HTML中，至少对于相关元素，看看是否有效。

knockoutjs html绑定无法正常工作

1 个答案: