- #WATCHING STATE PROPERTY 2 UPDATE#
- #WATCHING STATE PROPERTY 2 SOFTWARE#
- #WATCHING STATE PROPERTY 2 CODE#
#WATCHING STATE PROPERTY 2 SOFTWARE#
Not to be outdone, Google’s own software features its fair share of ecosystem lock-in, using systems like Google Drive and Gmail to make sure that users are constantly within the realm of Google’s reach, while simultaneously leveraging their hardware division to build phones, smart speakers, and more that take advantage of sticking inside a single platform. Apple has built an incredible example in all of this, bonding the Mac and iPhone together is a way where some people refuse to switch to another platform just because of the ability to send messages from their Mac.
In 2020, almost every device in our possession has some sort of ecosystem lock-in, creating a world where it’s best to stick with a single platform over spreading yourself out. You can build quite complex applications using only React.Mac vs. It’s a good idea to get to know React first, before adding in additional libraries. Should I use a state management library like Redux or MobX? This GitHub comment dives deep into the specific examples. This would make some of the new features we’re working on impossible to implement.This would break the consistency between props and state, causing issues that are very hard to debug.
#WATCHING STATE PROPERTY 2 UPDATE#
However, you might still be wondering why React doesn’t just update this.state immediately without re-rendering. This boosts performance by avoiding unnecessary re-renders. Why doesn’t React update this.state synchronously?Īs explained in the previous section, React intentionally “waits” until all components call setState() in their event handlers before starting to re-render. In the future versions, React will batch updates by default in more cases. This is an implementation detail so avoid relying on it directly. This results in significant performance improvements in larger apps. Instead, React “flushes” the state updates at the end of the browser event. This ensures, for example, that if both Parent and Child call setState during a click event, Child isn’t re-rendered twice. Learn more about setState When is setState asynchronous?Ĭurrently, setState is asynchronous inside event handlers.
#WATCHING STATE PROPERTY 2 CODE#
Pass an updater function instead of an object if you need to compute values based on the current state (see below for details).Įxample of code that will not behave as expected: what’s currently on the screen.Ĭalls to setState are asynchronous - don’t rely on this.state to reflect the new value immediately after calling setState. In React, both this.props and this.state represent the rendered values, i.e. Why is setState giving me the wrong value? Here are some good resources for further reading on when to use props vs state: While both hold information that influences the output of render, they are different in one important way: props get passed to the component (similar to function parameters) whereas state is managed within the component (similar to variables declared within a function). Props (short for “properties”) and state are both plain JavaScript objects. What is the difference between state and props? When state changes, the component responds by re-rendering. SetState() schedules an update to a component’s state object.
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