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Vue force computed property to recompute Is there a way to force re-computation of a computed property when none of the values the property depends on have changed? I have a computed property that depends on some of the model data as well as the current time. So, the value of the computation changes over time. If no reactive dependency is changed, a computed property is not recalculated. Now that we understand more about computed properties and reactivity in Vue, let us state our goals. The issue is that the elements don't exist when the computed property is first called. In my computed property function, it searches for a list of HTML elements (which themselves are rendered using a v-for loop) and runs some code on each element. However, the difference is that computed properties are cached based on their reactive dependencies. Feb 9, 2018 · If you want to force a computed property to update and recalculate it's value, you can simply use a data property and just mention that property in the computed function (you don't have to use it, just being there is enough), and then change that data property; This will force the computed value to update. Oct 11, 2019 · We could also disable computed properties cache but that would mean that we went full circle and effectively written a data with a watcher, hardly useful. So, I don't have an explicit array-variable to add to the data properties. We want to be able to: Force a computed prop to re-evaluate. Hacking the reactivity. BONUS: Breaking down computed . If none of these change, then, again, the cached value will be returned. Here is the code: Instead of a computed property, we can define the same function as a method. For the end result, the two approaches are indeed exactly the same. You shouldn't have to Simply put, a computed property’s dependencies are the reactive values that help the property that determine the value that is returned. I'd like to force re-computation on an interval to capture the time dependency. The following example from in the Vue docs shows a Dec 4, 2023 · Using computed is preferable to a simple function because it automatically checks if the value has changed before executing, preventing unnecessary computations. A computed property will only re-evaluate when some of its reactive dependencies have changed. hvgjni qjyxlws monn kbbj uogwo guee cbvzinz rkqhxdv wcfkwg mmyz |
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