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35 lines
732 B
Markdown
35 lines
732 B
Markdown
---
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date: 2020-08-26
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id: fd131977-33f2-42cd-9a3b-46ffd58b9e43
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title: JavaScript Object Mutability
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---
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# Description
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With objects, there is a difference between having two references to the
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same object and having two different objects that contain the same
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properties.
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# Examples
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``` javascript
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let object1 = {value: 10};
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let object2 = object1;
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let object3 = {value: 10};
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console.log(object1 == object2); // true
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console.log(object1 == object3); // false
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object1.value = 15;
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console.log(object2.value); // 15
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console.log(object3.value); // 10
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```
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\`const\` objects can have their values changed
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``` javascript
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const score = { visitors: 0, home: 1 };
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score.visitors = 23;
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console.log(score); // { visitors: 23, home: 1 }
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```
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