I want to render a JSX with some condition being true and map through an array.
below is the code,
{this.props.variables &&
this.props.variable.map((variable, index) => {
let element;
if (variable.anchor) {
element = document.querySelector(variable.anchor);
}
this.box_ref.current && element && (// error here
<Childcomponent
element1={this.box_ref.current}
anchor={variable.anchor}
/>)
}
}
)
}
There is an error saying that the expression is not an assignment or a call. how can I fix it? thanks.
You need to provide a return value for #Array.map
callback .
Also, you should provide unique keys to React elements within an array:
<>
{this.props.variables &&
this.props.variable.map((variable, index) => {
let element;
if (variable.anchor) {
element = document.querySelector(variable.anchor);
}
// v Add return statement
return (
this.box_ref.current &&
element && (
<Childcomponent
key={index}
element1={this.box_ref.current}
anchor={variable.anchor}
/>
)
);
})}
</>
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