@edugouvfr/ngx-dsfr
Version:
NgxDsfr est un portage Angular des éléments d'interface du Système de Design de l'État Français (DSFR).
28 lines • 3.86 kB
JavaScript
/**
* https://www.w3resource.com/JSON/JSONPath-with-JavaScript.php
* @param obj : object|array This parameter represents the Object representing the JSON structure.
* @param path : string This parameter represents JSONPath expression string.
* @return une valeur extrait de l'objet Json ou undefined si le path est erroné
*/
export function jsonPath2Value(obj, path) {
const keys = path.split('.');
// value est soit un objet JSON, soit une valeur terminale
let value = obj;
const breakException = {};
try {
keys.forEach((key) => {
if (!value)
throw breakException;
// key, ex: 'labels[20]'
const matchArr = key.match(/([^\[]*)\[(\d*)\]/);
const k = matchArr ? matchArr[1] : undefined; // clé sans l'indice, ex : 'labels'
const i = matchArr ? matchArr[2] : undefined; // indice, ex : 20
value = k && i ? value[k][i] : value[key];
});
}
catch (e) {
// console.error(`Le chemin '${path}' ne correspond pas à une valeur`);
}
return value;
}
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