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VisualizaçõesHow to get parent props in child component when using styled component in react
Let me illustrate with an examble
//NavLink: react router component
const StyledNavLink = styled(NavLink)`
color: red;
background: blue;
`
function styledLink(label, to) {
return <StyledNavLink
to={to}
className={(props) => console.log(props)}
>
{label}
</StyledNavLink>
}
Here nothing is printed...
If I use NavLink instead of StyledNavLink, I get all the prop values in console.
Then how to get NavLink properties in StyledNavLink component?
2 Respostas
Responde à pergunta0
Issue
The className prop of the NavLink component is conflicting with the className prop used by styled-components. The styled(NavLink) component will only ever have a stringified className prop whereas the NavLink component can take either a string or function className value.
Solution
Pass the NavLink className prop under a different prop and handle the conditional logic in the styled component.
Example:
const StyledNavLink = styled(({ className, navLinkClassName, ...props }) => (
<NavLink
{...props}
className={(props) => {
let extraClass =
typeof navLinkClassName === "function"
? navLinkClassName(props)
: navLinkClassName;
return [className, extraClass].filter(Boolean).join(" ");
}}
/>
))`
color: red;
background: blue;
&.activeLink {
color: green;
background: lightgreen;
}
`;
Usage:
function styledLink(label, to) {
return (
<StyledNavLink
to={to}
navLinkClassName={(props) => {
console.log("styledLink", props);
return props.isActive ? "activeLink" : null;
}}
>
{label}
</StyledNavLink>
);
}
...
{styledLink("home", "/")}
If you meant for styledLink to actually be a React component:
function StyledLink({ label, to }) {
return (
<StyledNavLink
to={to}
navLinkClassName={(props) => {
console.log("StyledLink", props);
return props.isActive ? "activeLink" : null;
}}
>
{label}
</StyledNavLink>
);
}
...
<StyledLink to="/" label="home" />
0
I think you are not passing the props from the parent into your styled component. It should be somewhat like this -
const StyledNavLink = styled(NavLink)`
color: red;
background: blue;
`;
const Menu = (props) => {
const { label, to } = props;
return <StyledNavLink to={to}>{label}</StyledNavLink>;
};