3 examples of 'how to pass state from one component to another' in JavaScript

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7export function mergeStates (
8 components: ComponentSpaceIndex, // new components
9 lastComponents: ComponentSpaceIndex // old components
10): ComponentSpaceIndex {
11
12 let comps: ComponentSpaceIndex = {}
13
14 for (let i = 0, ids = Object.keys(lastComponents), len = ids.length; i < len; i++) {
15 let newComp = components[ids[i]]
16 let lastComp = lastComponents[ids[i]]
17
18 // resulting component
19 comps[ids[i]] = newComp
20
21 // if the component still existing
22 /* istanbul ignore else */
23 if (newComp) {
24 // if the new component state is an object
25 if (typeof newComp.state === 'object') {
26 for (let j = 0, keys = Object.keys(newComp.state), len = keys.length; j < len; j++) {
27 // compare old definition and new state deeply, if equal let the modified old state
28 if (deepEqual(newComp.state[keys[j]], lastComp.def.state[keys[i]])) {
29 comps[ids[i]].state[keys[j]] = lastComp.state[keys[j]]
30 }
31 }
32 } else { // if is a value or undefined
33 /* istanbul ignore else */
34 if (newComp.state === lastComp.def.state) {
35 comps[ids[i]].state = lastComp.state
36 }
37 }
38 }
39 }
40
41 return comps
42}
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284setState(newState) {
285 if (typeof newState === 'object') {
286 const oldstate = Object(_utils_clone__WEBPACK_IMPORTED_MODULE_4__["default"])(this.state);
287 this.state = Object.assign(oldstate, newState);
288
289 Object(_utils_skipInProductionAndTest__WEBPACK_IMPORTED_MODULE_5__["default"])(() => Object.freeze(this.state));
290
291 if (this.$config.listen) {
292 this.$privateStore.setState(newState);
293 }
294 } else {
295 // console.error('[Radi.js] ERROR: Action did not return object to merge with state');
296 }
297
298 if (!this.$config.listen && typeof this.view === 'function' && this.html) {
299 _r_utils_fuseDom__WEBPACK_IMPORTED_MODULE_3__["default"].fuse(this.html, this.view());
300 }
301 this.trigger('update');
302 return this.state;
303}
121function _updateState(nextState) {
122 logger.log("[UPDATE]: nextState = " + nextState);
123 currentState = nextState || currentState;
124}

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