26 lines
578 B
JavaScript
26 lines
578 B
JavaScript
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const monster1 = { eyeCount: 4 };
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const handler1 = {
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set(obj, prop, value) {
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if ((prop === 'eyeCount') && ((value % 2) !== 0)) {
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console.log('Monsters must have an even number of eyes');
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} else {
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return Reflect.set(...arguments);
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}
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}
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};
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const proxy1 = new Proxy(monster1, handler1);
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proxy1.eyeCount = 1;
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// expected output: "Monsters must have an even number of eyes"
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console.log(proxy1.eyeCount);
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// expected output: 4
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proxy1.eyeCount = 2;
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console.log(proxy1.eyeCount);
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// expected output: 2
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console.log(proxy1.eyeCount);
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// expected output: 2
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