botframework-webchat-component
Version:
React component of botframework-webchat
30 lines (29 loc) • 7.13 kB
JavaScript
;
Object.defineProperty(exports, "__esModule", {
value: true
});
exports.default = useStateRef;
var _react = require("react");
function _slicedToArray(arr, i) { return _arrayWithHoles(arr) || _iterableToArrayLimit(arr, i) || _unsupportedIterableToArray(arr, i) || _nonIterableRest(); }
function _nonIterableRest() { throw new TypeError("Invalid attempt to destructure non-iterable instance.\nIn order to be iterable, non-array objects must have a [Symbol.iterator]() method."); }
function _unsupportedIterableToArray(o, minLen) { if (!o) return; if (typeof o === "string") return _arrayLikeToArray(o, minLen); var n = Object.prototype.toString.call(o).slice(8, -1); if (n === "Object" && o.constructor) n = o.constructor.name; if (n === "Map" || n === "Set") return Array.from(o); if (n === "Arguments" || /^(?:Ui|I)nt(?:8|16|32)(?:Clamped)?Array$/.test(n)) return _arrayLikeToArray(o, minLen); }
function _arrayLikeToArray(arr, len) { if (len == null || len > arr.length) len = arr.length; for (var i = 0, arr2 = new Array(len); i < len; i++) { arr2[i] = arr[i]; } return arr2; }
function _iterableToArrayLimit(arr, i) { var _i = arr == null ? null : typeof Symbol !== "undefined" && arr[Symbol.iterator] || arr["@@iterator"]; if (_i == null) return; var _arr = []; var _n = true; var _d = false; var _s, _e; try { for (_i = _i.call(arr); !(_n = (_s = _i.next()).done); _n = true) { _arr.push(_s.value); if (i && _arr.length === i) break; } } catch (err) { _d = true; _e = err; } finally { try { if (!_n && _i["return"] != null) _i["return"](); } finally { if (_d) throw _e; } } return _arr; }
function _arrayWithHoles(arr) { if (Array.isArray(arr)) return arr; }
function useStateRef(initialValue) {
var _useState = (0, _react.useState)(),
_useState2 = _slicedToArray(_useState, 2),
_ = _useState2[0],
forceRender = _useState2[1];
var valueRef = (0, _react.useRef)(initialValue);
var setter = (0, _react.useCallback)(function (value) {
var current = valueRef.current;
value = value instanceof Function ? value(current) : value;
if (current !== value) {
valueRef.current = value;
forceRender({});
}
}, [forceRender, valueRef]);
return Object.freeze([valueRef.current, setter, valueRef]);
}
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