Current File : //var/www/html/node_modules/jsx-ast-utils/src/getPropValue.js
import getValue, { getLiteralValue } from './values';
const extractValue = (attribute, extractor) => {
if (attribute && attribute.type === 'JSXAttribute') {
if (attribute.value === null) {
// Null valued attributes imply truthiness.
// For example: <div aria-hidden />
// See: https://facebook.github.io/react/docs/jsx-in-depth.html#boolean-attributes
return true;
}
return extractor(attribute.value);
}
return undefined;
};
/**
* Returns the value of a given attribute.
* Different types of attributes have their associated
* values in different properties on the object.
*
* This function should return the most *closely* associated
* value with the intention of the JSX.
*
* @param attribute - The JSXAttribute collected by AST parser.
*/
export default function getPropValue(attribute) {
return extractValue(attribute, getValue);
}
/**
* Returns the value of a given attribute.
* Different types of attributes have their associated
* values in different properties on the object.
*
* This function should return a value only if we can extract
* a literal value from its attribute (i.e. values that have generic
* types in JavaScript - strings, numbers, booleans, etc.)
*
* @param attribute - The JSXAttribute collected by AST parser.
*/
export function getLiteralPropValue(attribute) {
return extractValue(attribute, getLiteralValue);
}
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