dkempner's comments

dkempner | 10 years ago | on: An overview of JavaScript reactive frameworks

Most of the time, data binding IS one-way when using Knockout.

Input field? That's one-way from display => a variable in your viewmodel.

P tag? That's one-way from variable in viewmodel => display.

But when do you really need two-way data binding? Form validation and formatting. Man, this stuff is hard even with two-way data binding. You have to be able to accept, parse, format, and validate all in the same element. It's very helpful to be able to use knockout for a task like this.

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