Component names must start with a capital letter (that is, M圜omponent, instead of m圜omponent).We can organized groups of elements into React components.Ī basic function component is written similarly to a regular JavaScript function with a couple of differences. When I dig into the react. We can write fragments in a regular or shorthand syntax: or. For more information see: Fragments - short syntax. While it is supported in JSX syntax, it is not part of the HTML standard and thus is not supported natively by browsers.
If we don’t want to wrap our elements in a container element like a div, we can use a fragment: // valid syntax The React framework offers a shorthand syntax for fragment components that appears as an empty tag: <>.
React requires that all returned elements be returned within a single “parent” component.įor example, we can’t return two sibling elements, like an h1 and a paragraph from a component: // this syntax is invalid React also gives us an element called a fragment. Inline styles are not written as plain strings, but as properties on objects: My header To apply inline styles, instead of using double quotes (“”), we use two sets of curly braces.
The most common example is the class attribute, which we write as className. Since JSX is really JavaScript and JavaScript uses a camelcase naming convention (that is, “camelCase”), attributes are written differently than HTML. They must end in a forward slash /: Īdditionally, JSX requires a different syntax for its attributes.
This feature is especially handy when working with multiple elements in a components return statement, and you can choose to use theUnlike HTML, single-tag elements (like the img element), must be self-closing. By using React.Fragment, you can simplify your syntax and boost the efficiency and accessibility of your React applications. However, because JSX is really just JavaScript functions (and not HTML), the syntax is a bit different. We write React elements using a feature called JSX. by the shorthand syntax, so the rule will not warn on standard-form fragments that use those. You can write any valid HTML element in React. Enforce shorthand or standard form for React fragments. React elements are written just like regular HTML elements.
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