Function isReactElement

docs/app/js/sanddance-app.js:6904–6906

(value)

var canUseSymbol = typeof Symbol === "function" && Symbol.for;
var REACT_ELEMENT_TYPE = canUseSymbol ? Symbol.for("react.element") : 0xeac7;
function isReactElement(value) {
    return value.$$typeof === REACT_ELEMENT_TYPE;
}
function emptyTarget(val) {
    return Array.isArray(val) ? [] : {};
}