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feat: meta.emit

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This commit is contained in:
cha0s 2019-03-18 19:57:31 -05:00
parent c1f18949e5
commit c240ee6337
1 changed files with 8 additions and 2 deletions
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10
packages/mixins/property.js
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@ -23,6 +23,12 @@ export function PropertyMixin(key, meta = {}) {
meta.transformProperty = (key) => `${key}_PRIVATE_PROPERTY`; meta.transformProperty = (key) => `${key}_PRIVATE_PROPERTY`;
} }
meta.emit = meta.emit || function(...args) {
if (this.emit) {
this.emit(...args);
}
}
meta.eq = meta.eq || function (l, r) { meta.eq = meta.eq || function (l, r) {
return l === r; return l === r;
} }
@ -65,8 +71,8 @@ export function PropertyMixin(key, meta = {}) {
set: function (value) { set: function (value) {
const old = meta.get.call(this); const old = meta.get.call(this);
meta.set.call(this, value); meta.set.call(this, value);
if (this.emit && !meta.eq.call(this, old, value)) { if (meta.track && meta.emit && !meta.eq.call(this, old, value)) {
this.emit(`${key}Changed`, old, value) meta.emit.call(this, `${key}Changed`, old, value);
} }
}, },
}); });