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<title>Object.defineProperty 監聽對象屬性變化</title>
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<script type="text/javascript"> let obj = {} let value = '' Object.defineProperty(obj, 'name', { get: () => { return value }, set: (newVal) => { console.log('檢測到變化', newVal); value = newVal; } }) console.log(obj.name, ' 1') obj.name = 'mfg' console.log(obj.name, ' 2') </script>
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