How Can I Show A Dynamically Generated Textarea On Button Click Using Knockout Js?

I want to show a text area based on a button click. Pretty simple, but the textarea and button are dynamically generated using Knockout js. My current code works, except it only ex

Solution 1:

I would try creating 2 properties on the project model, 'show' and 'toggleTextArea':

<!-- ko foreach: projects -->
<div id="eachOppyProject" style="border-bottom: 1px solid #eee;">
    <table>
        <tbody>
            <tr>
                <td><a data-bind="attr: { href: '/tools/oppy/' + guid }" style="font-size: 25px;"><span class="link" data-bind="    value: guid, text: name"></span></a></td>
            </tr>
            <tr data-bind="text: projectDescription"></tr>
            <tr data-bind="text: guid"></tr>
        </tbody>
    </table>
    <span class="forminputtitle">Have you done project this before?</span>  
    <input type="button" id="oppyBtn" class="btnOppy" value="Yes" data-bind="click: toggleTextArea" />
    <textarea id="oppyDoneTextArea" placeholder="Tell us a little of what you've done." style="height:75px;" data-bind="visible: show" /><br />
</div>
<!-- /ko -->

your project model could be something like this:

var project = function(){
    var self = this;
    self.show = ko.observable(false);
    self.toggleTextArea= function(){
        self.show(!self.show());
    };
}; 

This allows the click of the button to toggle the status of the textarea.

Solution 2:

I think you ca try this to get the result.

HTML (the button and textarea are the last two controls):

<!-- ko foreach: projects -->
    <div id="eachOppyProject" style="border-bottom: 1px solid #eee;">
        <table>
            <tbody>
                <tr>
                    <td><a data-bind="attr: { href: '/tools/oppy/' + guid }" style="font-size: 25px;"><span class="link" data-bind="    value: guid, text: name"></span></a></td>
                </tr>
                <tr data-bind="text: projectDescription"></tr>
                <tr data-bind="text: guid"></tr>
            </tbody>
        </table>
        <span class="forminputtitle">Have you done project this before?</span>  
        <input type="button" id="oppyBtn" class="btnOppy" onclick="displayTextArea(this)" value="Yes" />
        <textarea id="oppyDoneTextArea" placeholder="Tell us a little of what you've done." style=" display:none; height:75px; " /><br />
    </div>
<!-- /ko -->

JavaScript:

function displayTextArea(element) {
    var my_disply = element.nextSibling
    if (my_disply == "block")
        document.getElementById('oppyDoneTextArea').style.display = "none";
    else
        document.getElementById('oppyDoneTextArea').style.display = "block";
}

Hope it will help you and will work only when the textarea is the next sibling to button on clicking of which you have to show the textarea