React News Thursday, May 24
- React, Inline Functions, and Performance – componentDidBlog
- ES2018 Regular Expression Updates – an Opinionated Summary
- Why ReactJS Is More in Demand
- React Native vs Real Native Apps – codeburst
- Freebie Bot Daily
- So anyway, strict equality checks on objects, even with seemingly similar values, will evaluate to false: – So, if you inline an object in your JSX, it will fail the PureComponent prop diff and move on to diffing the more expensive React elements.
- Since functions are objects and PureComponent does a strict equality check on props, an inline function will always fail the prop diff and move on to the element diff in the reconciler.
- Id like to show that you can have inline functions and performance optimizations both at the same time.
- If a component usually changes when theres an update, then a PureComponent will be doing two diffs instead of just one (props and state in shouldComponentUpdate, and then the normal element diff).
- The character is not included in the match: – – The negative lookbehind assertion matches the character in a string in case the character before is not an : – – You can see in both solutions that no capture groups were created.
- In order to capture the value of a lookbehind in a capture group, you can add parentheses around the expression you want to capture: – – In this expression, the resulting regex match object contains the captured character under the index .
- Suppose we would like to retrieve the currency, the numeric price value, and the full price with currency in a string of format: – – The regular expression matching this string is the following: – – We have to escape the dollar sign as a currency, because is a metasyntax…
- The documentation details how you can match certain unicode character groups with some expressions, without the use of any third party libraries.
- As stated already, the most compelling feature of React is that it reduces the complexities of user interface.
- You describe the user interfaces in React languages and tell it what you want, it will take care to translate your description and prepare the actual interface.
- You will illustrate user interfaces to React with simple components.
- When state of a component changes, its User Interface will change automatically.
@react_planet: React Native vs Real Native Apps☞ https://t.co/NAnApLjImz#Reactjs #RealNative https://t.co/2oqC4o2NnB
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