How to make KnokoutJS and ClipboardJS work together?

问题

I try to copy to clipboard some information from Knockout foreach:

<tbody data-bind="foreach: selections">
    <tr>
        <td>
            <a href="#" class="copy_btn" data-bind="attr: { 'data-clipboard-text' : name}"><i class="fa fa-copy"></i></a>
        </td>
    </tr>
</tbody>

with ClipboardJS:

var btns = document.querySelectorAll('a.copy_btn');
var clipboard = new Clipboard(btns);

clipboard.on('success', function (e) {
    console.log(e);
});
clipboard.on('error', function (e) {
    console.log(e);
});

But it's not copying. What I'm doing wrong?

回答1:

So, maybe somebody needs:

ko.bindingHandlers.clipboard = {
    init: function (element, valueAccessor, allBindings, viewModel, bindingContext) {
        var clipboard = new Clipboard(element);
    }
};

and

<a href="#" class="copy_btn" data-bind="clipboard, attr: { 'data-clipboard-text' : name, title: 'Copy to clipboard'}"><i class="fa fa-copy"></i></a>

回答2:

Alrighty, thanks @devspec for your initial answer. I built on it in some crucial ways:

so my final binding handler is:

ko.bindingHandlers.clipboard = {
    init: function(element, valueAccessor, allBindings, viewModel, bindingContext) {
            // This will be called when the binding is first applied to an element
            // Set up any initial state, event handlers, etc. here
            var options = ko.unwrap(valueAccessor());
            if(options.textComputed) {
                options.text = function(nodeToIgnore) { return options.textComputed(); };
            }

            if(options.onmodal) {
                options.container = element;
            }

            var cboard = new Clipboard(element, options);
            if(options.success) {
                cboard.on('success', options.success);
            }
            if(options.error) {
                cboard.on('error', options.error);
            }



            ko.utils.domNodeDisposal.addDisposeCallback(element, function() {
                        // This will be called when the element is removed by Knockout or
                        // if some other part of your code calls ko.removeNode(element)
                        cboard.destroy();
                    });
        },
}

And an example of usage is:

The Html:

<a href="#" data-bind="clipboard: { onmodal: true, textComputed: command, success: function(event) { copyCommandResult(true, event); },
error: function(event) { copyCommandResult(false, event); }}"><small
    data-bind="text: clipboardLink ">copy to clipboard</small></a>

on the view model command is a computed, if it was a function that returned a string (without an argument) you could use the text attribute only

And the copyCommandResult is simply:

 self.copyCommandResult = function(success, e) {
//    console.log("Copy to clipboard success? " + success)
//    console.info('Action:', e.action);
//    console.info('Text:', e.text);
//    console.info('Trigger:', e.trigger);

    if(success) {
      self.clipboardLink("Copied successfully!");
    } else {
      self.clipboardLink("Could not copy to clipboard");
    }
    setTimeout(function(){ self.clipboardLink(DEFAULT_CLIPBOARD_LINK_TEXT); }, 3000);

  }

来源：https://stackoverflow.com/questions/40333853/how-to-make-knokoutjs-and-clipboardjs-work-together

标签

javascript

knockout.js

clipboard

clipboard.js