CODEWITHSUNDEEP
cssclassmagentoknockout.jsdata-binding
steros
steros

Reputation: 1924

add dynamic class with css binding

I want to add a class behind payment-method by function with the knockout css binding (in Magento 2.1). So this is the current code:

<div class="payment-method" data-bind="css: {'_active': (getCode() == isChecked())}">
    <div class="payment-method-title field choice">
        <input type="radio"
               name="payment[method]"
               class="radio"
               data-bind="attr: {'id': getCode()}, value: getCode(), checked: isChecked, click: selectPaymentMethod, visible: isRadioButtonVisible()"/>

The class is returned by getCode() which works above with the id and value. So I thought I could do just:

<div class="payment-method" data-bind="css: {'_active': (getCode() == isChecked()), getCode()}">

But then it fails with:

knockout.js:2624 Uncaught SyntaxError: Unable to parse bindings. Bindings value: css: {'_active': (getCode() == isChecked()), getCode() } Message: Unexpected token }

<div class="payment-method" data-bind="css: getCode()">

This works.

<div class="payment-method" data-bind="css: {getCode()}">

This doesn't.

<div class="payment-method" data-bind="css: {'_active': (getCode() == isChecked())}, attr: {'class': getCode()}">

This works too but will overwrite the payment-method class and the _active class isn't set either initally anymore.

How do I set that dynamic class?

Upvotes: 1

Views: 2941

Answers (3)

sidonaldson
sidonaldson

Reputation: 25284

Another example should anyone need it

<div data-bind="attr: { 'class': 'mainClass' + (dynamicClassSetOnce ? ' ' + dynamicClassSetOnce : '' }, css: { 'mainClass--focussed': isFocussed }">
...
</div>

Upvotes: 0

steros
steros

Reputation: 1924

The comment from @tyler_mitchell helped me find the solution myself through this thread: https://stackoverflow.com/a/21528681/928666

I can do:

<div class="payment-method" data-bind="attr: { 'class': 'payment-method ' + getCode() }, css: {'_active': (getCode() == isChecked())}">

Not brilliant but well...

Upvotes: 0

tyler_mitchell
tyler_mitchell

Reputation: 1747

This piece of code is redundant, as the css data-bind is getting overwrite with your attr binding.

<div class="payment-method" data-bind="css: {'_active': (getCode() == isChecked())}, attr: {'class': getCode()}">

This is how you can do your dynamic class (assumption these properties are observable):

<div class="payment-method" data-bind="css: CSS">

self.CSS = ko.computed(function() {
    var code = self.getCode();
    var isChecked = self.isChecked();
    return code + ' ' + (code == isChecked ? '_active' : '');
}, viewModel);

Upvotes: 3

Related Questions