KnockoutJS - Disable Binding
This binding is the negation of enable binding. This binding disables the associated DOM element when the parameter evaluates to true.
Parameter consists of Boolean like value, which decides whether the element should be disabled or not. If the parameter is true or true-like value, then the element is disabled.
Non-Boolean values are considered as loosely Boolean values. Meaning 0 and null are considered as false-like value and Integer and non-null objects are considered as true-like value.
If the condition in parameter contains an observable value, then the condition is re-evaluated whenever the observable value changes. Correspondingly, related markup will be disabled based on the condition result.
Let us take a look at the following example which demonstrates the use of disable binding.Live Demo
Let's carry out the following steps to see how the above code works −
Save the above code in disable-bind.htm file.
Open this HTML file in a browser.
The save button is disabled when the user has not entered any feedback.
You can also use a random expression to decide whether element should be disabled or not.