![]() ![]() To make sense of this, let's take a look at a simpleĮlse statement in action. The most common conditional statement we will use in our code is the if / else statement or just To kick your JavaScript skills into outer space, everything you need to become a JS expert is available in both paperback and digital editions. These are the digitalĮquivalents of the decisions we make where our code does somethingĭifferent depending on whether something is true or This may not be evident from the code we've written so far, but weĪre going to fix that. This generalization especially applies to everything our computerĭoes. (☃️), but that's generally how we, others, and pretty much all living Going more broad, every decision you and I make can be modeled as a series of trueĪnd false statements. The answer to that question determines your next step and ultimately whether you were a t-shirt, hoodie, or jacket. By the time you step outside your door, youĬonsciously or subconsciously will have made hundreds ofĭecisions with each decision having a certain effect on whatįor example, if the weather looks cold outside, you might decide toĪt each stage of making a decision, you ask yourself a question that can be answered as true or false. ![]() Look outside to see what the weather is like.īrush your teeth. So prefer v-show if you need to toggle something very often, and prefer v-if if the condition is unlikely to change at runtime.From the moment you wake up, whether you realize it or Generally speaking, v-if has higher toggle costs while v-show has higher initial render costs. ![]() In comparison, v-show is much simpler - the element is always rendered regardless of initial condition, with CSS-based toggling. V-if is also lazy: if the condition is false on initial render, it will not do anything - the conditional block won't be rendered until the condition becomes true for the first time. V-if is "real" conditional rendering because it ensures that event listeners and child components inside the conditional block are properly destroyed and re-created during toggles. V-show doesn't support the element, nor does it work with v-else. The difference is that an element with v-show will always be rendered and remain in the DOM v-show only toggles the display CSS property of the element. ![]()
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