10 examples of 'vue watch nested property' in JavaScript

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92public watchPath(path: string): void {
93 if (!CExample.all[path]) {
94 this.existed = false;
95
96 return;
97 }
98
99 this.existed = true;
100
101 const has: Record<string, boolean> = {};
102 const src: Record<string, string> = {};
103
104 defaultTypes.forEach(ext => {
105 has[ext] = false;
106 src[ext] = '';
107 });
108 CExample.all[path].forEach(ext => {
109 has[ext] = true;
110 src[ext] = '';
111 });
112
113 this.extensions = [...new Set<string>([...defaultTypes, ...CExample.all[path]])];
114 this.has = has;
115 this.src = src;
116
117 this.loadSourceCode();
118}
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116function watchProps (watchDepth, scope, watchExpressions, listener){
117 var supportsWatchCollection = angular.isFunction(scope.$watchCollection);
118 var supportsWatchGroup = angular.isFunction(scope.$watchGroup);
119
120 var watchGroupExpressions = [];
121 watchExpressions.forEach(function(expr){
122 var actualExpr = getPropExpression(expr);
123 var exprWatchDepth = getPropWatchDepth(watchDepth, expr);
124
125 if (exprWatchDepth === 'collection' && supportsWatchCollection) {
126 scope.$watchCollection(actualExpr, listener);
127 } else if (exprWatchDepth === 'reference' && supportsWatchGroup) {
128 watchGroupExpressions.push(actualExpr);
129 } else {
130 scope.$watch(actualExpr, listener, (exprWatchDepth !== 'reference'));
131 }
132 });
133
134 if (watchGroupExpressions.length) {
135 scope.$watchGroup(watchGroupExpressions, listener);
136 }
137}
42function watcher(prop, callback, next, prev) {
43 if (this.initial) return;
44 if (this.$listeners[`update:${prop}`]) {
45 if (this.propsIsUpdating[prop]) {
46 this._watcher.active = false;
47 this.$nextTick(() => {
48 this._watcher.active = true;
49 });
50 } else {
51 this._watcher.active = true;
52 callback(next, prev);
53 }
54 this.propsIsUpdating[prop] = false;
55 } else {
56 callback(next, prev);
57 }
58}
25function initWatch(vm) {
26 var watch = vm.$options.watch;
27 if (watch) {
28 for (const key in watch) {
29 const handler = watch[key]
30 if (Array.isArray(handler)) {
31 for (let i = 0; i < handler.length; i++) {
32 createWatcher(vm, key, handler[i])
33 }
34 } else {
35 createWatcher(vm, key, handler)
36 }
37 }
38 }
39}
33private w0() {
34 Schedule.multiSelect = this.display.multiSelect;
35 this.schedule.recomputeAll(false, 100);
36}
259anotherMethod() {
260 method2 = 2
261}
157function initWatch (vm, watch) {
158 for (const key in watch) {
159 const handler = watch[key]
160 if (Array.isArray(handler)) {
161 // 为什么这里会是数组
162 // Sub = Vue.extend({ watch: {a:funcA }}), subvm = new Sub({ watch: {a:funcB })
163 // 最终subvm的options.watch = { "a": [funcA, funcB] }
164 for (let i = 0; i < handler.length; i++) {
165 createWatcher(vm, key, handler[i])
166 }
167 } else {
168 createWatcher(vm, key, handler)
169 }
170 }
171}
181initWatch() {
182 for (const key in this.watch) {
183 new Watcher(this, key, this.watch[key])
184 }
185}
20private onChildChanged(to: Route, from: Route) {
21 if (to.params['stack-key-dir'] === 'forward') {
22 this.transitionName = 'forward';
23 } else {
24 this.transitionName = 'back';
25 }
26}
510registerComplexWatchers: function registerComplexWatchers() {
511 var _this4 = this;
512
513 var props = ['fixed'];
514 var aliases = {
515 realWidth: 'width',
516 realMinWidth: 'minWidth'
517 };
518 var allAliases = props.reduce(function (prev, cur) {
519 prev[cur] = cur;
520 return prev;
521 }, aliases);
522
523 Object.keys(allAliases).forEach(function (key) {
524 var columnKey = aliases[key];
525
526 _this4.$watch(key, function (newVal) {
527 _this4.columnConfig[columnKey] = newVal;
528 var updateColumns = columnKey === 'fixed';
529 _this4.owner.store.scheduleLayout(updateColumns);
530 });
531 });
532}

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